THE NEUTRALIZED BATTERY
AND OTHER CHESS IDEAS
86 Selected Problems
by Uri Avner
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Special publication of VARIANTIM
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September 1994
ISSN 0793-2456
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THE NEUTRALIZED BATTERY AND OTHER CHESS IDEAS
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Preface
This collection contains 86 of my problems, in which I managed to employ the untamed powers of
the chess pieces in service of strictly defined ideas. Behind each diagram in this booklet lies a
history of struggle with the pieces, their laws and limitations, and their capricious behavior - a
struggle characterized by moments of hope, excitement, joy and despair. The reconstruction of such
history, i.e. the creative process itself, could be of no less interest than the end product, even
granting it a further dimension. For this, however, a different kind of effort would be needed, and a
lot more space... Meanwhile, the reader is invited to try and sense something of that process by
studying the only testimony given here - the end positions.
The problems appear in chronological order, undivided into groups. The conventional subdivision
into types seemed too artificial, while my preferable division by main ideas (implied by the title) was
beyond the scope of this booklet. I hope the index could be helpful in this direction.
Some of the problems in this collection are co-productions, and I shall use the opportunity to thank
my composer-friends for the fascinating hours they granted me. Also I should like to thank Ram
Softer and Ofer Comay for valuable technical assistance in preparation of this material, and useful
suggestions.
Ramat-Gan, September 1994	Uri Avner
1
UriAvner: Selected Problems
Probleemblad 1955
4th Hon. Mention
10+10
1
Set: 1...R:e4 2.Qg5#
1...B:e4 2.c4#
Sol: 1.Re1!(2.Sf7#)
1...R:e4 2.Sc4#
1...B:e4 2.Rd5#
1...R:d6 2.Qg5#
1...S:d6 2.c4#
(1...K:d6,Ra7,f3 2.e5,Re6,Qg3#)
Ruchlis, Give and take key, self-pins, self-
blocks on flight squares, dual avoidance.
2
Israel Ring Ту (Al-Hamishmar) 1955-56
1st Prize
3#	11+11
2
1.Sc5! (2.Rd3+ e:d3 3.Qe3#)
1...R:a3 2.Qd5+ c:d5 3.Se6#
1...Rh3 2.Qe5+te5 3.Se6#
1...Be2 2.Q:e4+f:e4 3.Se6#
1...Qg5 2.Qd6+ e:d6 3.Se6#
(1...f4 2.R:e4+K:c5 3.d4#).
Raumungsopfer (vacating-sacrifice), flight-
giving key, neutralization of ambush by
withdrawal.
3
To Mat (Greece) TT 1956
1st Hon. Mention
2#
8+7
3
Set: 1...d6 2.Sc6#
1...d5 2.Bd4#.
Sol: 1.Sf6! (2.Bd6#)
1...d6 2.Bd4#
1...d5 2.Sc6#
(1...R:f6, Rc8,S:f5 2.Qg3,S:d7,Q:f5#)
Reciprocal changes; reciprocal change of
function ЬР/wS, bivalve key (guard-unguard
key),self-block, selfdnterference.
2
UriAvner: Selected Problems
4
Israel Problemists Association
4
Set: 1...S:b6 2.B:e5+ K:e5#
1...Sd:b8 2.R:e6+ K:e6#
Sol: 1.Qd6! (2.Qe7+ B:e7#)
1...S:b6 2.Q:e6+ K:e6#
1.,.Sd:b8 2.Q:e5+K:e5#.
Changes after "self-Novotny" key, reciprocal
change of mates, anniMation of back-
support, Black royal battery.
10th Jub. Ту 1956-57
3rd Prize
S2#
7+13
5
Set: 1...S:e3 2.c4+ S:c4#
1...R:e3 2.Bf7+ Re6#
1...Sf4 2.Qe6+ S:e6#
1...Rf4 2.Qd4+ R:d4#.
Sol: 1.Qf4! (2.R:f5+ Q:f5#)
1...Se3 2.Qo4+S:c4#
1...Re3 2.Qe5+R:e5#
1...S:f4 2.Bf7+ Se6#
1„.R:f4 2.c4+ R:c4#.
Avner mechanism, ideal Ruchlis, battery
creation, masked battery creation: "dentist",
pendulum key.
5
Problem 1957
1st Prize
S2#	13+11
6
1.Bg1!
1,..Sg6 2.Se4+! Kd3 2.Sc5+ Kc2 4.Rb2+
1...Se6 2.Sg4+! Kd3 3.Se5+ Kc2 4.Rb2+
1...Sd7 2.Sh3+! Kd3 3.Sf4+ Kc2 4.Rb2+.
Fleck, Siers-battery, triple avoidance.
Israel Ring Ту (Al-Hamishmar) 1957
1st Prize
3
UriAvner: Selected Problems
7
FIDE tourney 1957-58
3rd Prize
2#	10+11
7
Set: 1...Rc:d3 2.Qg4#
1...Rd:d3 2,Qe8#
1...S:d3 2.Sg3#
Sol: 1.R:f7! (2.Q:h7#)
1..,Rc:d3 2.Rf4#
1...Rd:d3 2.Re7#
1...S:d3 2.Bc6#
(1...Bf5,Bg6 2.B:f5,Q:g6#)
Stocchi with changed mates, indirect battery
forming key, unguard key.
8
Match Israel-Switzerland 1960
8
Set: 1...Sc1 2,S:c1
1...Sf4 2.S:f4
1...Sd4 2.S:d4
1...Sg1 2.S:g1
(1...b3 2.b:c3)
Sol: 1.b3! (Zugzwang)
1...Sc1 2.Sf4
1...Sf4 2.Sc1
1...Sd4 2.Sg1
1...Sg1 2.Sd4
Double reciprocal change in mutate form,
Grab in set, Zugzwang in solution with
avoidance of stalemate.
9
1st try: 1.Bb6+? c:b6 2,Sc7 S:c5!
Sol: 1.Sf3! (2.Sd4) d:c5
2nd try:2.Bb6+? c:b6 3.Sc7 Sd6!!
2.Se5! (3.S:c6#) Rd6
3rd try: 3.Bb6+? c:b6 4.S:c7 Sd8!!!
3.Bb8! (4,B:c7#) Bd8
4,S:c7! - 5.R:a6#.
Successive manoeuvers for incarceration of
bSb7, "deja vun refutations, Sequential
planning, obstructing-vacating chain, logical
tries in each step.
4
UriAvner: Selected Problems
10
10
Set: 1...R:f4 2.Sb6+ K:e5 3.Sc4+ R:c4#
1...S:f4 2.Sc5+ K:e5 3.Sd3+ S:d3#
Sol: 1.B:d6! (2.Re8+ K:d6 3.S:f7+ S:f7#)
1...R:f4 2.Sc5+ K:f6 3.Se4+ R:e4#
1...S:f4 2.Sb6+ K:f6 3.Sd5+ S:d5#
(1...K:d6 2.Re8~3.S:f7+)
Reciprocal changes, Siers battery, pendulum
key, flight-giving key, Black battery creation.
Die Schwalbe 1979
1st-2nd Prize e.a.
S3#	12+10
11
1.a5! (Zugzwang)
1...	Kc8 2.R:c7+ S:c7 3.Sd6+ S:d6#
1,..Sd~ 2.Sd6+ S:d6 3.a6+ K~#
1...Se~ 2.a6+ Kc8 3.R:c7+ S:c7#
Cycle AB-BC-CA of White's 2nd and 3rd
moves, royal 1/3 battery.
11
Szachy 1979 (version)
3rd Prize
12
1.Qb1! (Zugzwang)
1...	KC4 2.S:e3+ S:e3 3.B:b3+ R:b3+ 4.Qe4+
1...R- 2.Qf5+ Kc4 3.S:e3+ S:e3 4.Qe4+
1...Sg~ 2.B:b3+ R:b3 3.Qf5+ Kc4 4.Qe4+
Cycle AB-BC-CA of White's 2-3 moves, royal
1/3 battery, White to play, flight-giving key.
S4#	10+11
5
UriAvner: Selected Problems
13
Canadian Chess Chat 1980
3rd Prize
13
Tries: 1.B:g3+? K:e3 3.Bf4+ Ke4 3.Sf2+ B:f2!
1.B:h6+? K:e5 2,Bf4+ Ke4 3.Sg5+
R:g5!
Sol: 1.Ba2!l (2.Bg5+ K:e5 3.Qf4+ Кеб 4.c5#)
1...Rc5 2.B:g3+! K:e3 3.Bf4+ Ke4 4.Sf2#
1...Bc5 2.B:h6+! K:e5 3.Bf4+ Ke4
4.Sg5#
Logical tries, anticipatory Grimshaw
interferences, neutralization of (dynamically
created) Black royal ambush, White battery,
switchback, anticipatory battery forming key.
14
The Problemist 1980
1st Prize
S4#	11+12
14
1.Ka5!l (Zugzwang)
1...Kc4 2.Rd:d4+ S:d4 3.Se3+ B:e3 4.Qb5+
1...S- 2.Se3+ B:e3 3.Qb7+ Kc4 4.Qb5+
1...B- 2.Qb7+ Kc4 3.Rd:d4+ S:d4 4.Qb5+
(1...Be3 (or 1...B:f6) 2.Se3+ etc.; 1...Se7
2.f:e7! Kc4 3.Se3+ B:e3 4.Qb5+ or 2...B-
3.Qb7+ Kc4 4.Qb5+).
Cycle AB-BC-CA of White's 2-3 moves, 1/3
royal battery, flight-giving royal key.
15
Yochanan Afek & UA
The Problemist 1981
2nd Hon. Mention
Mil/ 11
a
Ф11 Ф1
3#	11+8
15
Set: 1...h6 2.R:d7 ~ 3.Rf7#
1...Rh5 2.Sc8~3.Se7#
Sol: 1.Be7! (2.Q:d5+ Kg4 3.Q:g5#)
1...h6 2.Sc8~3.Sd6#
1...Rh5 2.R:d7 ~ 3.R:d5#
Reciprocal changes, pendulum key,
anticipatory valve key, obstructing & vacating
key, Black withdrawal & obstructing.
6
UriAvner: Selected Problems
16
Yochanan Afek & UA
Die Schwalbe 1981
16
Set:	2.Sf7 Bc3 3.B:c6#
1,..Bf2 2.Sg8 Bc5 3.B:c6#.
Tries: 1,Sg8? B:g5
1.Sf7? B:g5
[1.B:a4? (same play as in set) Bf5l]
Sol: 1.Bd3! (2,a8S (3.S:c7#) R:a8 3.Be4#)
1...Be1 2.Sg8 Bb4 3.B:e4#
1...Bf2 2.Sf7 Bd4 3.B:e4#
(1 ...Bf5 2,R:e5+ K:e5 3.R:f5#)
Reciprocal changes, interference-Roman,
pendulum key.
2nd Prize
3#	8+11
17
Set: 1...R:b3 2.Rd6+ Kf5 3.Se3+ R:e3#
1...RC2 2.Qc3+ b:c3 3.f8Q+ B:f8#
1...S:b3 2.Se4+ Кеб 3.Sc5+ S:c5#
1...Sc2 2.Ra6+ Ke7 3.Q:b4+ ~:b4#
Sol: 1.Qc2! (Zugzwang)
1...Rb3 2.Qc3+ b:c3 3.f8Q+ B:f8#
1...R:c2 2,Se4+ Кеб 3.Sc5+ R:c5#
1...Sb3 2.Ra6+ Ke7 3.Qc5+ S:c5#
1...S:c2 2.Rd6+ Kf5 3.Se3+ S:e3#
4-fold Lacny, Avner-mechanism, direct and
masked battery creation, dentist, pendulum
key.
17
Israel Ring Ту (Shahmat) 1981
1st Prize
S3#	14+11
18
a)	Try: 1,Rh1? Ke3 2.Rh6 Sf4??
Sol: 1.Qg7! Ke3 2.Qh6+ Sf4#
b)	Try: 1.Qa5? Kd4 2.Qh5 Sde5??
Sol: 1.Rh1! Kd5 2.Rh5+ Sde5#
Anticipatory unpinning, half royal battery,
cross-checks, thematic tries, Meredith.
18
The Problemist 1981
Commended
H2# b) Bf7 to h6 5+5
7
UriAvner: Selected Problems
19
Sinfonie Scacchistiche 10 TT 1981
1st Prize
' J И
£6
1
A a
; я	A
H2# b) b4 to e5	4+8
19
a)	1.Rg2! Kb7 2.Kc5 Rf5#
b)	1.Bd2! Kd8 2. Кеб Bc4#
Anticipatory self-interference, neutralisation
of a future masked royal battery, Meredith.
20
Die Schwalbe 1981
20
Black to move: 1.S:f4+ Sd5+ 2.Kd3 S:f4#;
White to move: 1,S:d7+ S16+ 2.Ke5 S:d7#.
"Knight-chase”, Umnov, annihilation, cross-
checks, royal unpin, diagonal-orthogonal
correspondence.
21
Israel Ring Ту (Shahmat) 1982
Commended
21
1.Qb1!(2.Qe1#)
1...S:e3 2.d3!# (2,d4?)
1,..Ke2 2.d4l# (2.d3?)
(1...Sf3 2.Qf1#)
Schiffmann dual-avoidance, flight-giving key,
bi-valve, White battery.
8
UriAvner: Selected Problems
22
Tries: 1.Q:c6? Q:e1! (2.Ke4+ Kg2!)
1.Qg8? B:e1!(2.Kg5+Kg2l).
Sol: 1.Qa2! (2.Qg2#)
1...Q:e1 2,Ke4#
1...B:e1 2,Kg5#
White tine combination with K/Q interfemce
(in tries), White royal battery, bi-valve.
23
a)
b)
22
UA & Yochanan Afek
UA & Yochanan Afek
Die Schwalbe 1982
3rd Prize
1.d3! (Zugzwang)
1,..K:b6 2.QC5+ K:c5#
1...a:b6 2.B:a6 b5#
1...R:b6 2.Qb5+ R:b5#
1.d4! (Zugzwang)
1 ...K:b6 2,Q:b5+K:b5#
1...a:b6 2.Qc5+ b:c5#
1...R:b6 2.Ba6R~#
Lacny, Black battery creation.
1 fii
НЙО4
1
1
S2# Zeroposition 10+9
a)+wPa4 b)+bPb5
24
Try: 1.Sg7? (Zugzwang)
1...Sc~ 2.Qa4+ Kc3 3.Qc4+ S:c4#
1...Se~ 2.Qb2+ Ka5 3.Qb5+ S:b5#
(1...SC4 2.d:c4)
but 1...S:d3!
Sol: 1.Sd6!l (Zugzwang)
1...SC- 2.Qb2+ Ka5 3.Sc4+ S:c4#
1...Se~2.Qa4+ Kc3 3.Sb5+ S:b5#
Reciprocal changes with half-battery in try
and masked half-battery in solution,
paradoxical masking key.
24
Magyar Sakkelet 1982
4th Prize
a
• fi IS
1Ф
S3#
11+8
9
UriAvner: Selected Problems
25
UA & Yochanan Afek
Schweizerische Schachzeitung 1982
1st Prize
25
1.Qc5! (2.Q:c6+ B:c6 3.d:c8Q(R)+ R:c8#)
1...f:e5 2.b8S+ S:a7 3.Q:c6+ B(S):c6#
1...S:d7 2.b8R+ S:a7 3.Q:b6+ S:b6#
1...b:c5 2.b:c8Q+ Kb6 3.Ra6+ R:a6#
(1...B:c5 2.R:c6+ B:c6 3.d:c8Q(R)+ R:c8#)
Same unit (wPb7) pinned as 4 different
pieces, Phoenix theme.
S3#	8+12

26
The Problemist 1982
1st Prize	
11 1 X# & 1 a 11	
S3#	14+11
26
1.Sf6! (2.Kc3+ Ka5 3.b4+ Q:b4#)
1...Qa5 (Qc5,Qc6) 2.Qc4+ Kb6 3.Sd5+
Q:d5#
1...	Q:c7 2.Ke4+ Qc4 3.R:e5+ R:e5#.
wQ pinned on 3 different lines, mobile kings,
Black and White royal batteries.
27
Festival Colonelli (Brazil) 1982
1st Prize
27
a)	1.Qf5!l 0-0-0 2.Qe4 Qd6#
b)	1,Qa4l! 0-0 2.Qe4 Qf6#
Shortest/longest suspending moves by bQ,
castling.
10
UriAvner: Selected Problems
28
1.B:c6+ Ke7+ 2,Bd7 Rb5#
1.R:b7+ Ke8 2,Rd7 Sce7#
Visserman idea, annihilation, cross-checks,
Grimshaw unpins, selfpins, White royal
battery and indirect half-battery, change of
function bBa4/bR and wRb7/wSc6, Zilahi
theme.
28
Mordechay Shorek & UA
The Problemist 1982
29
1.Sa5 Bc5 2.B:g3(Ra1)+ b:a5(Sb8)#
1.Bc4 Rc3 2.B:d6(Bc1)+ b:c4(Bc8)#
Cross-checks, Circe-specific selfpins, change
of function wRg3/wBd6, Zilahi.
Themes-64 1982
2nd Hon. Mention
H2# Circe 11+8
2 Solutions
30
1.Bg7! (2.Sc3+ d:c3 3.R:e3+S:e3#)
1...R:h5 2.Sd6+ Kd5 3.Sd:e3+ S:e3#
1...R:c1 2.Bf5+ Kd5 3.Sc:e3 S:e3#
1...S:c2 2.R:d4+ S:d4 3.Q:e3+ S:e3#
1...Sb1 2.S:f2+ e:f2 3.Sd2+ S:d2#
1,..Sg~ 2.Sd2+ e:d2 3.S:f2+.
5 double pins including all 4 combinations of
double pins from two pairs of half pinned
pieces - task.
30
2nd WCCT 1980-83 (Section F)
1st Place
S3#
12+15
11
Uri Avner: Selected Problems
31
2nd WCCT 1980-83 (Section E)
3rd Place
H2# b)Qa2toh5 7+14
31
a)	1.Be3! Ke1 2.Bc5+ Sce3#
b)	1,Re3! Kg1 2.Re6+ Sfe3#
Black Grimshaw, Umnov, cross-checks,
unpins, self-blocks.
32
The Problemist 1983
S3* b) after the key 11+10
32
a)	1.Se8! (Zugzwang)
1...	Rd4 2,Sb3+ Kd5 3.Sc7+
1...	R:d3 2.b4+ Kd5 3.Sc7+.
b)	1.Sf6! (Zugzwang)
1...	Rd4 2.b4+ R:b4 3.B:d6+
1...	R:d3 2.Sb3+ R:b3 3.B:d6+.
Reciprocal changes, mutate, "perpetuum
mobile" form, guard/unguard keys.
33
Bat Yam Congress 1983
2nd Prize
S2# Circe 10+10
33
1.c:d3(Bc8)l (Zugzwang)
1...e:d3(Pd2) 2.B:f4(Rh8)+ K:f4(Bc1)#
1...B:e6(Pe2) 2.Q:h5+(Ra8) K:h5(Qd1)#
1...Bd7 2,Qg6+ K:g6(Qd1)#.
Anticipatory self-interference by rebirth of
reborn piece, Black royal battery.
12
UriAvner: Selected Problems
34
34
a)1.c:d2(Bc1) Rc6! 2,Q:c6(Rh1)+
B:d2(Pd7)#
b)1.d:e3(Bc1) Re6! 2.Q:e6(Rh1)+
B:e3(Pe7)#
c)1.e:f4(Bc1) Rh5! 2.Q:h5(Rh1)+
B:f4(Pf7)#
d)1.B:g5(Bc1) R:g8! 2,Q:g8(Rh1)+
B:g5(Bf8)#
e)1.S:h6(Bc1) Ra8! 2.Q:a8(Rh1)+
B:h6(Sb8)#
Task - all possible Queen checks with rebirth
blockings, cross-checks, capture of the
capturing piece, Circe-specific battery
creation.
Israel Ring Tourney 1983
1st Prize
H2# Circe 12+9
b-e) Bd2 to e3.f4.g5.h6
35
Thessaloniki Olympic Tourney 1984
2nd Prize
35
Tries: 1.Ra7? (2.Q:e4(Ra8)#) Ba6!
1.Re7? (2.B:d2(Bf8)#) Rd6!
Sol: 1 Bd3! (2.Rg1#)
1...Ba6 2.Q:e4(Ra8)!#
1...Rd6 2.B:d2(Bf8)!#.
Dombrovskis, anticipatory Novotny-key,
anticipatory interfemece & self-interference of
reborn piece.
2# Circe 10+6
36
Thessaloniki Olympic Tourney 1984
2nd Hon. Mention
36
Tries: 1.f4? (2.B:g5#) R:d8(Bc1)l
1.Bf3? (2.Qh5#) R:e8(Qd1)l.
Sol: 1.Bh3! (2.Sf3#)
1...R:d8(Bc1)2.B:g5l#
1...R:e8(Qd1) 2.Qh5!#.
Dombrovskis, anticipatory self-interference of
captured units in tries, anticipatory line-
clearance by Black.
2# Circe 8+7
13
UriAvner: Selected Problems
37
UA & Kjell Widlert
Andernach TT 1984
3rd-5th Prize e.a.
R2# Circe 6+10
37
1.R:e2(Ra8)! (2.Rc2 R:d8(Qd1)#)
1...Sd2 2.Q:d2(Sb8)! Sd7#
1...Bd3 2,Q:d3(Bc8)! Be6#
1,..Bc2 2.Qf8 R:f8(Qd1)#
1...B:b2 2.Sc2 R:d8(Qd1)#
1...Sg~ 2.b4 Q:g7(Pg2)#
1...Sf6+ 2.Kh8 Sf7#
Pinned piece play, Circe-specific battery
creation.
38
Kiel 1984
3rd Prize
в
S 442
1 a
аФйА
38
1,Sc4! (2.R:f2+ B:f2#)
1...B:c4 2.Bg2+ Kg4 3.Se3+ S:e3#
1,..e3 2.Se5+ Ke4 3.Q:e3+ S:e3#
1...R:h4 2.Qf4+ R:f4 2.Re3+ S:e3#
(1 ...S:h3 2.Sd2+ Kg4 3.Se3+ S:e3#)
3 unpins of Sf5 with 3 double-pin mates, 2
half-pin lines.
* ФЛЖ
S3#	9+13
39
The Problemist 1985
39
1,Sf1! (Zugzwang)
1...g5 2.Qe5+ Rd4 3.Qc7+ Rc4
4.Qg3+ Bd3 5.Bb4+ R:b4#
1...Bg8 2.Qc1+ Rc2 3.Qa3+ Bb3
4,Qb2+ R:b2 5.Rc4+ B:c4#
Reciprocal R/B,B/R Black battery creation.
14
UriAvner: Selected Problems
40
Set: 1..Л6 2.Gh6 Ga4#
1...f5 2.Gh3 Ga4#.
Tries: 1.Gh6? f6! 2.?
1.Gh3?f5! 2.?
Sol: 1.c6! (Zugzwang)
1..J6 2.Gh3+! Gb6#
1...f5 2.Gh6+! Gb6#.
Reciprocal changes, Vladimirov & Banny tries,
mutate, White half-battery, valves, dual
avoidance.
40
Andernach TT 1986
1st Hon. Mention
S2# Madrasi Rl 9+10
grasshoppers d1,e3,e6,g8
41
Tries: 1.Sb7? b:c1S!
1.Sf7? b:c1B!
Sol: 1.Qf8! (Zugzwang)
1...b:c1S 2.Sf7+! Kc4 3.Bd3+ S:d3#
1...b:c1B 2.Sb7+! Kc4 3.Sa3+ B:a3#
Ambush neutralization by anticipatory self-
interferences, Banny tries, White and Black
battery creation, minor promotions.
41
The Problemist 1986
3rd-4th Prize e.a.
S3#
13+7
42
1.Qh8! (2.Se8+ Ke4 3.Sd6+ Kf4 4.Rf8+ K:g4
5.Rg1+R:g1#)
1...c:d1S 2.Se5+ Kc5 3.Sfd7+ Kd4 4.Sd3+
Ke4 5.SI2+ S:f2#
1...c:d1B 2.Sd5+ Ke4 3.S7f6+ Kd4 4.Sc3+
Kc5 5.Sa4+ B:a4#
Mutual battery transformation, Black battery
creation, reciprocal bi-valves, minor
promotions.
42
The Problemist 1987
1st Prize
S5#	15+9
15
UriAvner: Selected Problems
43
3rd WCCT 1984-88 (Section F)
1st Place
S3#
14+11
43
Set: 1...Q:g2 2.Bd5+ Q:d5 3.Sb2+.
Sol: 1.Bh7!! (Zugzwang)
1...h:g2 2.Rg6~3.Sb2+
1...c:d6 2.Qe4+ Q:e4 3.Sb2+
1...g6 2.Qd5+ Q:d5 3.Sb2+
1...Sf3 2.Sg6+ Sd4 3.Sb2+
1...Q:g2 2.Sd5+ Qe4 3.Sb2+
(1...e1Q(B) 2.Q:b2+ - 3.Qb3+; 1...e1S
2.Q:c2+ S:c2 3.Rd4+)
Neutralization of White double ambush in 3
pairs of variations by: a) withdrawal &
(sacrificial) interfence by White; b) annihilation
or interference by Black & sacrificial
interference by White; c) White & Black
interference.
44
3rd WCCT 1984-88 (Section F)
1st Place - version (Vm 1988)
44
1.Bh7!! (Zugzwang)
1...Bd2 2.Qe4+ Q:e4 3.Sb2+
1...g6 2.Qd5+Q:d5 3.Sb2+
1...B:c3 2.Sg6+Bd4 3.Sb2+
1...Q:g2 2.Sd5+ Qe4 3.Sb2+
1...Bf2 2.Rg6~3.Sb2+
(1...Q- 2.Qb7 ~ 3.Qb5+)
A version of No. 43 where Rd6 is interfered,
not captured, without setplay.
S3#
14+11
45
3rd WCCT 1984-88 (Section G1)
3rd Place
SIS
&
н
t IS
3# Circe 10+14
45
Tries:
1.Ka7? f2! 2.Q:a2+ B:a2(Qd1)
3.Q:g4(Ra8)??
1.Kc7? Bf2! 2.Q:c3+ b:c3(Qd1)
3.Q:f1(Qd8)??
(1.Ka6? Rg6!).
Sol:
1.Ka5! (2.S:d6(Pd7)+ S:d6 3.R:c5 (Pc7)#)
1 ...12 2.Q:a2(Pa7)+! B:a2(Qd1) 3.Q:g4(Ra8)#
1...Bf2 2.Q:c3(Pc7)+! b:c3(Qd1)
3.Q:f1(Qd8)#
Circe-specific dual-avoidance with
introductory tries, anticipatory self-
interference of reborn piece by rebirth,
bi-valves, royal key.
16
Uri Avner: Selected Problems
46
Tries: 1.Re2+? Rhe3! 2.Sf3+ Kd5
1.Qe1+? Rae3! 2.Sd3+ Kd5.
Sol: 1.Kb7! (2.Sd7+ S:d7 3.Bd4#)
1...Raf3 2.Re2+! Re3 3.Sd3#
2...Kd5 З.ВЬЗ#
1...Rhd3 2.Qe1+! Re3 3.Sf3#
2...Kd5 3.Bf3#
(1...Rad3 2.Re2+; 1...Rhf3 2.Qe1+)
Holzhausen interferences, selfpins on varied
lines, royal key.
46
Hannelius 70th Jub. Ту 1988
4th Hon. Mention
3#	8+12
47
Tries: 1.S:b3(Ra8)+? R:h8(Bc1)+!
1.S:d3(Qd8)+? Q:h8(Bc1)+!
1.Q:f3(Pf7)+? f:g6(Pg2)+
Sol: 1.g7! (2.Q:f3(Pf7)#)
1...Se8 2.S:b3(Ra8)#!
(2.S:d3(Qd8)+? Q:b6(Sg1)l)
1...Bf8 2.S:d3(Qd8)#!
(2.S:b3(Ra8)+? R:a2(Bf1)l).
Dual avoidance by anticipatory valves (of
reborn piece), neutralization of White battery
by rebirth self-interferences.
47
Match Israel-USA 1988-89
5th Place
2# Circe 13+11
48
Set: 1...e:f4 2.Bg7+ Sh6#
or 2.Sd3+ Sf2#.
Sol: 1.Rb4! (2.Bf4+ Sh6#)
1...Ra8 2.Se4+ Sf2#
1...e4 2.Bg7+ Sh6#
1...d4 2.Sd3+ Sf2#.
4 unpins of bSg4, 4x Umnov, critical key.
48
Baruch Lender 75th Jub. TT 1989
1st Prize
S2#	8+13
17
UriAvner: Selected Problems
49
Theodor Tauber, Yossi Raz & UA
Bournemouth Congress 1989
1st Prize
1Ф1&1
as
49
Tries:
1.K-? (2.Rb5#)a6!
1.Ka6l? B:e3! (2.S:e3??)
1.K:a7l? B:b3! (2.e4??)
Sol: 1.K:c7! (2.Rb5+)
1...B:e3 2.S:e3#
1...B:b3 2.e4#
1...a6 2.Scb6#.
White corrections, selfpins,
royal pinning key.
2#	10+11
50
UA & Shlomo Seider
Probleemblad 1990
2nd Hon. Mention
3# Circe 5+13
50
1,Rf8! (2.СИ7+ S:f7(Qd1) 3.Qg4#)
1...Se5 2.Qe6+! K:e6(Qd1)+ 3.Q:d5(Pd7)#
1...Sf4 2.B:c6(Ra8)+! K:c6(Bf1)+
3.B:b5(Pb7)#.
Cross-checks, dual avoidance, anticipatory
line-clearance, neutralization of Black royal
battery by rebirth self-interfemce, self-blocks
(by rebirth).
51
Tries: 1.d:e3(Bf8)+? B:d6(Pd2)l
1.S:e3(Bf8)+? B:h6(Bc1)l
1.S:b2(Rh8)+? R:h6(Bc1)!
1.Rg1+? S:h5(Bf1)l
Sol: 1.Bg6! (2.Rg1#)
1...Se7 2.d:e3(Bf8)#
1,..Rg7 2.S:e3(Bf8)#
1...Bh7 2.S:b2(Rh8)#
(1...e:d1~2.R:d1#; 1...B:f2 2.Se3#)
Anticipatory self-interference of reborn piece,
neutralization of White battery by rebirth self-
interference.
2# Circe 14+13
18
Uri Avner: Selected Problems
52
Probleemblad 1991
2nd Hon. Mention
52
a)1.Bb1+! Rd3 2.Rc2! Rd5#
b) 1.Ra4+! Sc4 2.Sd4! Sa3#
Tempo-checks which determine an exact
second move by Black (and are determined
by it), mutual unpins, masked battery
creation.
H2# b) e2=bS 8+9
53
1.R:e6! (2.R:d6+Ke5 3.Qf6#)
1... S:b5 2.Bc3+! (2.Be3(Bf4)+? Bd4!)
2...Qd4 3.Se3#
2...Rd4 3.Sf4#
2...Sd4 3.Qa5#
1...S:f5 2.Be3+! (2.Bc3(Bf4)+? Qd4!)
2...Rd4 3.Sf4#
2...Bd4 3.Sc3#
2...Sd4 3.Qg5#
1...S:e6 2.Bf4+! (2.Bc3(Be3)+? Rd4!)
2...Bd4 3.Sc3#
2...Qd4 3.Se3#
2...Sd4 3.Qg8#
Pin mates, selfpins, anticipatory line-
clearance by annihilation, switchback, triple
avoidance by chioce of interference, White
masked battery.
53
Hans-Peter Rehm & UA
Israel Ring Ty(Variantim) 1991
1st Prize
3#	13+9
54
Shlomo Seider & UA
Dutch Problem Society 60th Jub. 1991
1st Hon. Mention
54
1.Sd4! (2.Q:h7+ g6 3.Q:g6#)
1 ...Rf:f6 2.S:b3 (3.Sc5#) Ba3 3.Sd2#
1...R:g8 2.S:f3 (3.Sd2#) R:f6 3.R:e5#
1.,.g6 2.S:e6 (3.R:e5#) Sbd4 3.Sc5#
(1...g:f6 2.R:g4+ B:g4 3.Q:g4#)
3-fold cyclic pseudo-le-Grand,
Black withdrawal.
3#
15+12
19
UriAvner: Selected Problems
55
Israel Ring Ту (Variantim) 1991
1st Prize
55
Tries: 1.c3? Rg5! 2.Bd1 Rg2!
1.Sd2? Rf5! 2.Bd1 R:f3l.
Sol: 1.Bd11 (Zugzwang)
1...R- 2.Qd4 ~ 3.SC4+ S:a6#
1...Rf5! 2.c3! R:f3 3.Sd4+ Sc2#
1...Rg5! 2.Sd2! Rg2 3.c4+ Sc2#.
Half battery forming key, change of function
Sb3/Pc2 (interference/unpin), Black
correction, Banny tries, dual avoidance.
56
Rene Jean Millour & UA
Andernach TT 1991
Special Prize
56
Tries: 1.g8R? f1R! 2.S:f1(Ra8)+ K:g4!
1,g8Q? f1Q! 2.S:f1(Qd8)+ K:g4l.
Sol: 1.Bb4! (2.Se4+ R:e4(Sb1) 3,Bd6#)
1...SC8 2.g8R! f1R(Ra8) 3,S:f1(Ra8)#
1...Se8 2.g8Q! f1Q 3.S:f1(Qd8)#
2...Sg7 3.Qb8#
(1...f1S 2.g8Q(R) ~ 3.Be1#)
Parallel promotion for paralysing after rebirth,
anticipatory self-interference of reborn /лесе.
3# Circe + Madrasi 8+11
57
Probleemblad 1991
2nd Hon. Mention
57
Set:
1...Sb4 2.Q:c7+ Sc6 3.Re5+ Sd5#
1...RC6 2,Re5+ Kb6 3.Sd5+ S:d5#
Sol:
1.Sa3! (2.Rc4+ S:c4#)
1...Sb4 2.Sd5+! (2.Sf5#?) Kd4 3.Sc2+ S:c2#;
1...RC6 2.Sf5+! (2.Sd5#?) Kb6 3.Sc4+ S:c4#;
(1...R:a4 2.Sg8+! Kd4 3.Sc2+ S:c2#)
Anticipatory Black & White selfpin, Black royal
battery, change of continuation, neutralization
of ambush, unmasking key.
S3#
11+12
20
Uri Avner: Selected Problems
58
1.Sd5! (2.Sd6+ ~ 3.Re4+ B:e4#)
1...Sf4 2.Qc3+! (2.Bd4+?) Ke4 3.d3+ B:d3#
1...B:h4! 2.Qc7+! (2.Qc3+?) Ke4 3.d3+ B:d3#
1...Sg5 2.Bd4+! (2.Qc3+?) K:f5 3.e4+ B:e4#
1 ...Bg5! 2.Bd6+! (2.Bd4+?) K:f5 3.e4+ B:e4#
(1...Sf2 2.S:h6+ Bg5 3.R:g5+ Bf5#)
Neutralization of ambush (Black royal battery
& 2 White indirect batteries), dual avoidance,
Black correction, Black & White anticipatory
selfpin, Black & White withdrawal.
58
Die Schwalbe 1991
	A
£	A *
& A	Й
	S
it	& a
1	aft ±
	HH
11+11
Try: 1.Qc8? (2.d4+)
1...Ra:d3 2.Sa5+ Kd4 3.Sb3#
1...B:d3 2.S:b4+Kd4 3.Sc2#
1,..Rg:d3 2.Se5+ Kd4 3.Sf3#
1...Q:d3 2.Se7+ Kd4 3.Sf5#
(1...Se6,Qh3 2,Sd8+,Se5+)
but 1 ...Qf5l.
(1.Qc7? Se6!)
Sol: 1 Sd4H (2.Qc6+;2.Qc7+)
1„.Ra:d3 2.Sb3+ ~ 3.Qc6#
1...B:d3 2.Sc2 ~ 3.Qc6#
1...Rg:d3 2.Sf3~3.Qc6#
1...Q:d3 2.Sf5 ~ 3.Qc6#.
Siers battery, anticipatory Black selfpin, line
clearance by annihilation, White ambush,
change of continuation, flight-giving key, task.
59
(After Bron & Davidenko 1979)
Die Schwalbe 1991
2nd Comm.
3#
13+11
60
The Problemist 1991
2nd Prize
60
1.Qe11! (2.h8Q+ e5 3.Bc5+ S:c5#)
1...Rd3 2.SC5+! (2.Sb6#?) K:c4 3.Qc3+
S:c3#
1...Qe3 2.Sb6+! (2.Sc5#?) Ke4 3.Sc3+ S:c3#
1...Q:f1 2.Qe4+! K:e4 3.Sc5+ S:c5#
Neutralization of a Black royal battery, Black
& White anticipatory selfpin, dual avoidance.
ла в л
ф tat ft
ft ®
aftfte ftft
S3#
14+12
21
UriAvner: Selected Problems
61
UA & Kjell Widlert
Probleemblad 1991
1st-4th Prize e.a.
R3# Madrasi 10+13
62
61
Tries: 1.R:b3? S:b3? 2,S:c5(Sd4)
(paralysing)
1.S:c2? R:c2? 2.Rc3(Rd2)
(paralysing).
Sol: 1.Q:c5! (2.Rd2!! - 3.Sd1 c:d1Q#)
1...Qf3 2.Qa7+! (2.Qa5+? Qd5!) Q:e3
3.R:b3! S:b3# (4.Sc5??,Sd4??)
(2...Sa3 3.Rd2 Rb1#)
1...Q:g3 2.Qa5+! (2.Qa7+? Qg7!) Q:e1
3.S:c2! R:c2# (4.Rc3??,Rd2??)
(2...Sa3 3.Rd2 Rb1#)
lllegalization of White's paralysing moves by
unparalysing self-checks, dual avoidance.
Schach Aktiv 1991
3rd Prize
S3#
9+8
62
1 Bg7! (2.Rdg6! - 3.Sb2+ R:b2#)
1...Sd2 2.Sd5+! Se4 3.Sb2+ R:b2#
1...Sf5 2.Sg6+! Sd4 3.Sb2+ R:b2#
Paradoxical self-interference on interfered
lines, Neutralizing a double White ambush by
White & Black anticipatory interference,
reciprocal bi-valve.
63
Michel Caillaud & UA
Andernach TT 1992
2nd Prize
63
1.Ra2!! (2.Kb2~3.R:a6)
1 ...h:g1 B! 2.Kb2? Bb6! 3.R:a6 stalemate!
2.e3! (Zugzwang)
2...Bh2 3.R:h2
2...Bf2 3.R:f2
2...B:e3 3.Re2!
1 ...hiB! 2.Kb2? Bc6! 3.R:a6 stalemate!
2.e4! (Zugzwang)
2...Bg2 3.R:g2
2...Bf3 3.S:f3
2...B:e4 3.Re2!
Stalemate trap, bishop promotion
on adjacent squares.
22
UriAvner: Selected Problems
64
Match Israel-Czechoslovakia T
64
a)1.K:b4 Be7+ 2.Sd6 R:b6#
b)1.K:d3 Q:h7+ 2,Qe4 Rf3#
Reciprocal pin transformation,
double pin mates, self-interference.
1st Place
H2# b)a6=wB 7+14
65
Match Israel-Czechoslovakia 1
2nd Place
65
a) 1.Kd4 Qh8 2.S:e5 Ra4#
b)1.K:e4 Bc6 2.S:d5 Re2#
Reciprocal pin transformation,
selfpins, double pin mates.
H2# b)Ra3toa4 11+6
66
1.Rc4! (2.Ra4+ S:a4 3.Sc4+ S:c4#)
1...Bd3 2.Qc5+ Qb5 3,S:b3+ S:b3#
1...Rc8 2.Rd5+ Rc5 2.S:b3+ S:b3#
1...Sa4(Sd3) 2.Rc5+ S:c5 3.Sc4+ S:c4#.
Reciprocal neutralization of White double
ambush by selfpin and Black interference.
66
Die Schwalbe 1992
S3#
12+11
23
UriAvner: Selected Problems
67
Variantim 1992
2#	8+10
67
Set: 1...Kd5 2.Q:e6#
1,..Ke3 2.Q:f3#
Sol: 1.Sc6! (2.Qd4#)
1...Kd5 2.Q:f3#
1...Ke3 2.Q:e6#
Reciprocal changes, flights, selfpins,
unmasking key (of anticipatory pin lines).
68
UA & Josef Retter
Bonn Congress 1992
1st Prize - version
2#	10+2
b) Ra1 to h2 c) Qg5 to h5
68
a)	1.Qf6!
1...Kb3,Kd3 2.Qc3#
1...Kb5.K:d5 2.Qc6#
b)	1.Qe7!
1...Kb3,Kb5 2.Qb4#
1...Kd3,K:d5 2.Qe4#
c)	1.Qh2!
1...Kb3,K:d5 2.Qa2#
1...Kb5,Kd3 2.Qe2#
Same mate to pairs of moves for all possible
pairs of a king star in 3 phases, task,
Zagorujko, Meredith.
69
The Problemist 1992
S6#	10+11
69
1.Qc8! (2.Q:c5+ K:c5 3.Rc8+ Kd4 4.Sc6+
Kc5 5.Scb4+ Kd4 8.Sc2+ R:c2#)
1...B:e7 2.R:d5+ K:d5 3.Qf5+ Kd4 4.Be5+
Kd5 5,B:g3+ Kd4 6.B12+ R:f2#
1...Sf6 2,Be5+ K:e5 3.R:g5+ Kd4 4.Sf5+
Ke5 5.S:g3+! (5.Se3+?) Kd4 6.Se2+ R:e2#
(1...Sa3 2.Be5+ K:e5 3.Qb8+ Kd4 4.Qb2+;
1...C4 2.Sf5+ K:d3 3.Q:c4+ Kd2 4.Qe2+)
И/Л/fe Siers batteries, battery creation with
introductory sacrifices.
24
UriAvner: Selected Problems
70
70
1.Qe5! (2.Rc5+ Kb6 3.R:a5+ S:d4#)
1...Q:a3 2.Qb8+ Ka4 3.S:c3+ S:c3#
1...Q:b4 2.B:b3+ Qc5 3.S:c3+ S:c3#
Reciprocal neutralization of double White
ambush by withdrawal and selfpin,
anticipatory half-pin.
Variantim 1992
71
Probleemblad 1992
71
1.Bc6! (2.Be5+ K:e5 3.Qc3+ S:c3#)
1...Q:c6 2.S:c5+ Qe4 3.S:e3+ S:e3#
1...Qg6 2,S:d6+ K:e6 3.Q:e3+ S:e3#
(1...B:f4 2,Rf6+ Ke5 3.Qc3+ S:c3#)
Disguised formation of short and long White
half-pin, Black selfpins.
72
72
1.Re3! (Zugzwang)
1...	e4 2.Qh4+ Ke5 3.S:f3+ S:f3#
1...	Bg5 2.Se6+ Kf5 3.R:f3+ S:f3#
(1...g6 2.Q:h6+ g5 3.Bd6Se2#; 1...g5 2.Q:h6
e4 3.Bd4 Se2#)
Royally masked White half-pin, anticipatory
Black selfpins.
Wola Gulowska 1992
3rd Comm.
S3#
9+11
25
Uri Avner: Selected Problems
73
UA & Yuri Bereznoj
Die Schwalbe 1992
S3#	12+11
73
1.Bb2! (2,Sa3+ Q:a3 3.c:d3+ Q:d3#)
1...B:c6+ 2.Ke3+ Be4 3.Qd5+ S:d5#
1...R:e5+ 2.Kf3+ Re4 3.Se5+ S:e5#
(1...S:d6+ 2.Ke3+ Se4 3.Qd5+ S:d5#
2...Rf4 3.Bd5+ S:d5#
1...S:e5 2.Ke3+ Rf4 3.Bd5+ S:d5#)
Cross-checks, Black Grimshaw unpins, Black
self pins, change of function Sc6/Qd5 and
BaQ/ReQ, White royal battery, adaptation of
HU idea (Visserman).
74
UA & Yuri Bereznoj
Phenix 1992
S3#	10+14
74
1.Ke6!l (2.Sb6+ B:b6 3.Qd5+ Q:d5#)
1...B:f5+ 2.Kd6+ Веб 3.Se5+ B:e5
1...R:g6+ 2.Kd7+ Re6 3.Rc5+ B:c5#
(1...SC8 2.R:c6+ Bc5 3.Qd5+; 1 ...Bf1 (Bg2)
2,Rc5+ B:c5 3.Qd5+)
Cross-checks, Black Grimshaw unpins,
change of function Sf5/Rg6 and Bh3/Rh6,
White royal battery, thematic key.
75
L'Echiquier Beige 1992
Prize
3#
11+10
75
Set: 1,..K:f6 2.h8Q+ Kg5 3.Qh4#.
Sol: 1.Rg4! (2.Sc4+ K:f6 3.h8Q#
2...B:c4 3.Kc2#)
1...Rb8 2.Bb7+!d5 3.Kb4#
1...B:h7 2.Be4+! d5 3.Kc2#
1...Qh3 2.Bf3+!d5 3.K:d3#
1...Rh2 2.Bg2+! d5 3.K:d2#
(1...e:d5 2.Q:d5+ K:f6 3.Sg8#; 1...Rf4
2.K:d2+ Rd4 3.B:d4#)
White royal battery, critical and pericritical
Black moves, mousetrap, bi-valve, task.
26
UriAvner: Selected Problems
76
Tries: 1.e:f8B? (2.Rh7#) Rb1! 2.Se6+ Sf4!
1.e:f8Q? (2.Rh7#) g:h5! 2.Se6+ Sc5!
Sol: 1.Se6! (2.Rh7#)
1...Rb12.e:f8Q!#(2...Sc5??,Sf4??)
1...g:h5 2.e:f8B!# (2...Sc5??,Sf4??)
Banny tries, dual avoidance, //legalization of
Black paralysing defenses.
76
Wola Gulowska 1993
77
Tries: 1.Sd6+?Sb5!
1.Se3+? Sc2l.
Sol: 1.Qb1! (2.Sd6!# (2...Sb5??))
1...e4 2.K:g8i# (2...Sc6??)
1...Be4 2.Se3!# (2...Sc2??)
(1...Ke4 2.B:b7#!)
Illegalization of Black's paralysing defenses,
bi-valves, flight-giving key.
77
Wola Gulowska 1993
2nd Prize
2# Madrasi 10+11
78
78
1.Se5! (2.Qg1+ h:g1B 3.e3+ B:e3#
2...h:g1S 3.Sf3+ S:f3#)
1...ЫВ 2.Sc6+ Kc4 3.Q:c2+ B:c2#
1...MS 2.Bc7+ Kc5 3.Qa3+ S:a3#
1...b:c1B 2.Ba3+ K:e5 3.Bb2+ B:b2#
1...b:c1S 2.Rc3 - 3.Rd3+ S:d3#.
3 pairs of minor promotions - task, battery
creation, masked battery creation - "dentist".
UA & Leonid Makaronez
Lindgren Jub. Ту 1993
1st Hon. Mention
S3#	13+8
27
Uri Avner: Selected Problems
79
Hava Kost Mem. TT 1993
1st Prize
79
Tries: 1.Ke1? (2.S:f4) B:b5! 2.Sg3#
1.Kf1?(2.S:f4) Qe4!2.Sd4#
1.R:f4+? Кеб! 2.g8Q(B)#.
Sol: 1.Rg2! (2.Rg3 ~ 3.B:a2(Rd3) Q:e2#)
1...Bd6 2.Ke1! (2,Kf1? Qe4! 3.Sd4#)
1...Be5 2.Kf1! (2,Ke1? B:b5! 3.Sg3#)
(1...B:b5 2.R:f4+! g:f4 3.B:a2; 1...Ke4
2.Kf1)
Dual avoidance, reflex-specific tries,
unpinning-repinning mechanism.
R3#	13+13
80
2#
11+7
80
Set: 1...K:e6 2.Qd7#
1...Q:e6 2.Se3#
Try: 1.Qa2?(2.Sd6#)
1...K:e6 2.Se3!#
1...Q:e6 2.Qf2#
but 1...Q:g7!.
Sol: 1.Sf4! (2.Se3#)
1...K:f4 2.Sd6!#
1...Q:f4 2.Qd7#.
Diagonal-orthogonal transformation, pseudo-
le-Grand, changed mates, transferred mates.
81
Diagrammes 11thTT 1993
4th Prize
&

1
1
±
4
81
Tries: 1.Sb4+? S:b2(Sb8)!
1.Sd4+? B:b2(Bf8)<
1.Se3+? Q:b2(Qd8)!
(1.Se1+? Kb4!; 1.S:a1(Sg1)+ Kc2!)
Sol: 1.S:h4(Sg1)!(2.S:h3(Sb1)#)
1...h:g1S(Sb8) 2.Sb4!# (2...S:b2??)
1...h:g1B(Bf8) 2.Sd4!# (2...B:b2??)
1...h:g1Q(Qd8) 2.Se3!# (2...Q:b2??)
Black unpins, White battery with Pb2 as the
rear piece, IBegaliztion of capture by unpinned
piece, promotions.
2# Anticirce 10+12
28
UriAvner: Selected Problems
82
Try: 1.Be1+? Kg2+ 2.Qe8!.
Sol: 1.Qd4! (2.Be1+! Kg2#)
1...Rge8! 2.KT2+! (2.Kg2+?) Re1#!
1...Rbe8! 2.Kg2+! (2.Kf2??) Re1#L
Royal bi-valve with kings as rear pieces,
illegalization of king captures, dual avoidance,
Meredith.
82
Diagrammes 11th TT 1993
5th Hon. Mention
83
1.C8S! (2,Qd5+ Qc5 3.Sc3+ S:c3#)
1...Sa4 2.Rd5+ Sc5 3.Sc3+ S:c3#
1...c1Q(R) 2.e8B+ Qc(R)c6 3.Sc3+ S:c3#
1..Л5 2.Qd7+ Qc6 3.Sc3+ S:c3#
1...SC4 2.Qc6+ Q:c6 3.Sc3+ S:c3#
Task - all 5 possible ways to neutralize an
ambush (pin, White & Black interference,
withdrawal, annihilation).
83
The Problemist 1993
13+10
84
UA & Kjell Widlert
Andernach TT 1993
84
1.Ra4! (2.Qc2 - 3.S:a2(=bS)+ Sb4#)
1...Qf1 2.B:e2(=bB) - 3.S:d3(=bS)+ Sb4#
1...Qh6 2.R:f6(=bR) - 3.S:c6(=bS)+ Sb4#
Anticipatory battery reinforcement by bQ,
Black battery creation, switchback,
White battery play.
2nd Prize - version
a
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it it
SB4A
S3# Andernach-chess 13+15
29
UriAvner: Selected Problems
85
Acheres 1993
1st Prize
S4#	11+11
86
UA & Mark Erenburg
Phenix 1994
S3#
10+12
85
1.Sce4! (2.Qe1 + B:e1 3,Bd2+ B:d2#)
1...S:d3 2.Sc4+ b:c4 3.Sd6+ Se5 4.S:c4+
S:c4#
1...S:f3 2.Sf5+ g:f5 3.Sd6+ Se5 4,S:f5+
Q:f5#; 1...B:b4 2,Qc1+ Bd2 3.S:d2 - 4.Sde4+
R:c1#.
Popandopulo-like mechanism, line clearance
by annihilation, switchback, unpinning key.
86
1.Rf2! (2.Sf5+ R:f5 3.Qd3+ S:d3#
2...B:f5 3. S:d5+ S:d5)
1...Be4 2.Sg4+ Q:g4 3.Qd3+S:d3#
1...Re5 2.Qh3+ Q:h3 3.S:d5+ S:d5#
(1...Bc2 2.B:c2 (3.Qd3+) b:c2 3.S:c2+;
1...B:b1 2.Sg4+ Ke4 3,Q:b1+)
Pin substitution (unpin-pin mechanism),
change of function wQ/wSf6, Novotny threat,
anti-critical defenses.
DEFINITION OF FAIRY CONDITIONS
Reflexmate - Selfmate where each side is obliged to mate in one whenever possible.
Circe - The captured piece is reborn on its initial game array square. For bishops, rooks and
knights - the square of same color as the capture square; for pawns - the square on the file of
capture. If the rebirth square is occupied, the captured piece disappears.
Anticirce - The capturing piece is reborn according to the above rules, and the captured piece
disappears. If the rebirth square is occupied, the capture is illegal. The capture on the rebirth square
itself is illegal.
Madrasi - A unit (except king) "attacked" by an identical unit of opposite color is paralysed (cannot
move, capture, check etc.).
Madrasi Rl - Same as above, but the kings also obey the Madrasi rule.
Andernach Chess - A unit (except king) capturing an enemy unit changes color.
Grasshopper - A fairy piece which moves along ranks, files and diagonals by jumping one square
beyond the nearest piece on the line.
30
UriAvner: Selected Problems
INDEX OF THEMES, MOTIFS AND EFFECTS
Annihilation 4,13,20,28,43
(see also: line clearance by
annihilation)
Anti-critical moves 86
Avner-mechanism 5,17
Banny 40,41,55,76
Battery (see also: battery creation,
neutralization of ambush)
...White 6,18,21,22,28,34,40,43,44,47,48,51,
52,53,55,59,62,63,66,70,75,81
...Black 2,4,5,11,12,14,17,19,23,24,33,37,39,
50,78, 82,86
...White & Black 7,10,13,20,26,29,31,41,42,
57,58, 60, 69,71,73,74,84
...indirect 2,4,7,13,28,41,43,44,58,59,62,63,
66,70
...masked 5,17,19,24,42,52,53,78
... royal 4,11,12,13,14,18,19,22,26,28,33,50,
57,58,60, 73,74,75,82
...Siers 6,10,20,42,59,69
...half-battery 18,24,28,40,55
...1/3-battery 11,12,14
...of anticirce type 81,82
Battery creation
...of front piece 5,7,10,13,17,23,31,41,42,52,
78,82, 84
...of rear piece 6,13,41,42,59,63
...of both 34,37,39,42,69,84
...masked battery creation - "dentist"
5,17,42,52,78
Battery reinforcement 84
Bi-valve 3,21,22,40,42,45,62,75,77,82
(see also: Valve)
Castling 27
Change
...of mates 7,80
...of continuation 57,59
(see also: Zagorujko)
Correction 49,55,58
Critical moves 48,75
Cross-checks 18,20,28,29,31,34,50,73,74
Cycle (of moves) 11,12,14
Diagonal-orthogonal transformation 20,80
Dombrovskis 35,36
Dual avoidance 1,21,40,45,47,50,
55,57,58,60,61,76,79,82
...3-fold 6,7,53
(see also: Stocchi, Fleck)
Fleck 6
Flights 67,68
Grimshaw 13,28,31,73,74
Holzhausen 46
((legalization (in fairy chess) 61,76,77,81,82
Incarceration 9
Interference 53,57,60,75,83
...anticipatory 35,43,44,62,66
...self-interference 3,16,22,64,83
...anticipatory self-interference
19,33,35,36,37,41,43,44,45,47,51,56,62
...self-interference by rebirth
29,33,34,45,47,50,51
(see also: Grimshaw, Holzhausen,
valve, bi-valve)
Key
...battery forming 6,7,13,41,42,55,63,84
...critical 48,60,75
...flight-giving 1,2,10,12,14,21,59,68,77
...guard/unguard 3,7,32
...masking 24
...Novotny 4,35
...obstructing/vacating 15
...paradoxical 4,13,24,59,63,74
...pendulum 5,10,15,16,17
pinning 49
...royal 14,45,49,74
...selfpinning 37,74
...unmasking 40,43,57,67
...unpinning 85
...valve/bivalve 3,15
Lacny 23
...4-fold 17
Line clearance
...by annihilation 28,53,59,85
...anticipatory 28,36,45,47,50
Line combination 22
Meredith 18,19,27,68,82
Mousetrap 75
Mutate 8,12,32,40
31
UriAvner: Selected Problems
Neutralization of ambush 29,47,50,51
...anticipatory 2,13,19,41,43,44,57,58,60,62,
66,70,83
...masked ambush 19,41
...double ambush 43,44,62,66,70
Novotny 4,35,86
Obstruction 9,15
Perpetuum mobile 32
Phoenix theme 25
Pin
...play by pinned piece 5,17,37
...double pin 30,38,64,65
...same piece pinned in different ways
25,26,46,64,65,79
...half-pin 30,38,71
...masked half-pin70,71,72
...selfpin
...White 18,49,66,70,79,83
...Black 1,21,28,29,46,53,59,64,65,67,71,
72,73,86
...White & Black 20,57,58,60
...anticipatory 57,58,59,60,70,71,72,79,86
...unpin 28,31,38,48,52,55,64,65,73,74,79,
81,86
...anticipatory 18
...royal 20
(see also: Schiffmann)
Popandopulo mechanism 85
Promotions 25,76,81
...minor 25,41,42,63,78
...parallel 56
...of same piece on different squares 63,78
(see also: Phoenix theme)
Pseudo le-Grand 80
...3-fold cyclic 54
Reciprocal change
...of mates 3,4,67
...of moves 8,10,15,16,24,32,40,42
...of function 3,20,28,29,31,39,42,55,64,65,
66,70,73,74,86
(see also: Zilahi)
Roman 16
Ruchlis 1
...ideal 5
Sacrifice 2,43,44,60,69,83,85
Schiffmann 21
Self-block 1,3,31,50
Setplay 1,3,4,5,7,8,10,15,16,17,40,57,67,80
(see also: Ruchlis, change, reciprocal
change, Lacny)
Stalemate trap 8,63
Star flights 68
Stocchi 7
Switchback 13,42,53,69,84,85
Task 30,34,59,68,75,78,83
Transfer (of mates) 80
Try/tries 18,22,24,35,36,40,41,45,46,47,49,
55,59,76,80,81
...logical 9,13,61
...reflex-specific 79
(see also: Banny, Dombrovskis,
Vladimirov)
Umnov 20,31,48
Vacation (of sqaure) 2,9
Valve 15,47
(see also: bi-valve)
Visserman idea 28,73,74
Vladimirov 40
Waiting moves 27,52
Withdrawal 2,15,22,43,44,54,58,70,83
White to play see : Mutate
Zagorujko 68
Zilahi 28,29
CO-AUTHORS
Afek, Yochanan 15,16,22,23,25
Bereznoj, Yuri 73,74
Caillaud, Michel 63
Erenburg, Mark 86
Makaronez, Leonid 78
Millour, Rene-Jean 56
Raz, Yossi 49
Rehm, Hans-Peter 53
Retter, Josef 68
Seider, Shlomo 50,54
Shorek, Mordechay 28
Tauber, Theodor 49
Widlert, Kjell 37,61,84
32
NOTATION
К = King
Q = Queen
R = Rook
В = Bishop
S = Knight
P = Pawn
G = Grasshopper
~ = Any move
+ = Check
# = Mate
S# = Selfinate
R# = Reflexmate
H# = Helpmate
TT = Theme-tourney
UA = Uri Avner
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