Section F: Selfmates

Judges: France, Germany, Israel, Russia, U.S.A.

Reserve Judges: Bulgaria

Theme:

Selfmates in 3 to 7 moves in which White – not on his last move – sacrifices a piece (not a pawn) to be captured, immediately or subsequently, by the black King. Arrival of the thematic piece on the sacrificial square during the solution is a requirement. A sacrifice on White’s last move will be regarded in the same way as any other non-thematic move, but the black capture of the piece thematically sacrificed may occur on any move.

Questions 1,2:
1. Can a white piece be sacrificed on a square protected by White, so that only after the protection is subsequently removed, the black King is able to capture it?
2. Can a white piece be sacrificed on a distant square, i.e. not at first adjacent to the black King, so that only later in play, after the black King approaches this square, the capture becomes possible?

Answer:
The answer to both questions is YES. These are special cases of anticipatory or delayed sacrifices which are allowed by the theme definition (the theme allows a non-immediate capture of the sacrificed pieces).

Questions 3:
1. Are multiple solutions allowed?
2. Are twins allowed? If so, zeropositions also?

Reply: Multiple solutions or twins are not allowed.

Question 4:
The theme calls for a piece (not a pawn) to be sacrificed and captured by the bK. Suppose there's a wP on e7 and it promotes, say e8=R, and subsequently black plays KxRe8, is that a thematic sacrifice?

Reply: Yes, this is a thematic sacrifice.


F01 - 1.Sc5+! d6 2.Da4+ K:c5 3.Tb5+! Kc6 4.Th5:+ Kb6 5.Da5+! Kc6 6.Dd8 Lb7#

F02 - 1.Tg7+ Kf6 2.f8T+ K:e6 3.c8D+ Kd6 4.De6+ K:e6 5.Tf6+ K::f6 6.Tg6+ K:g6 7.Dg7+ D:g7#, line clearance after pawn promotions and consecutive sacrifices of promoted men, Bristol, return of the king.

F03 - 1.De8 ,h5 2.Tb7+ K:b7 3.Td7+ Kc6 4.Tb7+ K:b7 5.Dc8+ K:c8#; 1.- Sc5 2.T:c5+ Kb6 3.Tc6+ K:c6 4.Tb7+ K:b7 5.Dc8+ K:c8#; 1.- Lb7 2.Tc7+ K:c7 3.Dd8+ Kc6 4.Tc5+ S:c5 5.Dc7+ K:c7#. (1.- Sb6 2.Dc8+ S:c8 3.T5d6+ S:d6 4.Tc7+ K:c7#)

F04 -  1.Lb3 D:c7 2.S:b4+ K:b4 3.Ta4+ K:b3 4.T:c3+ Kb2 5.Tb3+ K:b3 6.Dc2+ D:c2#

F05 - 1.Da4? Kb1 2.Ld1 Ka1!; 1.Lc6? 1.- f3 2.Da4 Kb1 3.Sc1 Kc1: 4.Da2 Kd1 5.Te1+ Ke1: 6.Tf1+ Kf1: 7.Dg2+ fg2#? 8.Lg2+!; 1.Ld1! f3 2.Da4 Kb1 3.Sc1 Kc1: 4.Da2 Kd1 5.Te1+ Ke1: 6.Tf1+ Kf1 7.Dg2+ fg2#.

F06 - 1.Tcc2 (zz) a3 2.Se1 K:e1 3.Td1+ K:d1 4.Sb3 K:c2 5.Dd2+ K:b3 6.Db2+ a:b2#. Four consecutive active thematic sacrifices, two of them with non immediate capture and three of them quiet.

F07 - 1.c:b8D+! Sc8 2.d8T+ Ke7 3.f8L+ K:d8 4.Le7+ K:e7 5.b:c8S+ K~+ 6.Se7+ K:e7 7.Df8+ K:f8#. Complete AUW offered to the Black King.

F08 - 1.Sd5+ Kc5 2.Tc4+ Kd5: 3.Lb7+ Ke6 4.Ld5+ Kd5: 5.Tc5+ Kc5: 6.Lb6+ Kb6: 7.Da7+ Ta7:#

F09 - 1.Ld7+!/i K:d7 2.c8L+/ii Kc6/Ke8 3.Ld7+ K:d7 4.De8+/iii K:e8 5.b8D+ Kd7 6.De8+ K:e8 7.Sf6+ T:f6#; i) 1.d7+? takes one move too many ii) dual-avoidance try: 2.De8+ K:e8 3.b8D+ Kd7 4.c8L+ Ke8 5.Ld7+ K:d7 6.De8+ etc., but 4.- Kc6! 5.Ld7+ Ta:d7! iii) try: 4.Dd8+ Ke6 5.Dc8+ Td7 6.f5+ K:f5 etc., but 4.- Kc6!. Phoenix Theme.

F10 - 1.Lc1! Kb4 2.Sd5+ Kc5 3.Dg4 K:d5 4.Te5+ K:e5 5.Lc4 e6 6.Ld2 e:f5 7.De2 f4#

F11 - 1.S1f2! Kc2 2.Le3+ Kc3: 3.Tc2 Kc2: 4.Dc6+ Kb1 5.Df3 Kc2 6.Dd1+ Kc3 7.Sb2: Lb2:#; 2.- Kb1 3.Te1+ Kc2 4.Tb1 Kb1: 5.Dh5 Kc2 6.Dd1+ Kc3: 7.Sb2: Lb2:#; 4.- Kc3: 5.Se5! Kc2 6.Dg6+ Kc3 7.Tb2: Lb2:#

F12 - Try: 1.Td1? Kf6: 2.Dh8+ (*) Ke6; 2.- Kg6?; 3.Tg1+ Kf7; 4.Dg8+ Kf6: 5.Tg6+ Kf5; 6.e4#; 2.- Kf7?; 3.Ta7+ Ke6 (Kg6 4.Tg1+ Kf5 5.Dh6) 4.Dh6+ Kf5 5.e4#; 3.De8+ Kf6! (and no mate in 6.- 3.- Kf5? 4.Df7+ Kg5 5.Dg7 Kf5 6.Dh6 e4#); (*) 2.Df8+ Kg6! (2.- Ke6? 3.De7+ Kf5 4.Df7+ Kg5 5.Dg7 Kf5 6.Dh6 e4#).After 2.- Kg6 no mate in 6: 3.Tg1+ Kh7: 4.Tg7+ Kh6; 5.Td7+ Kg6/g5; 6.Dg7+ Kf5; 7.Dh6 e4# (selfmate in 7), 1.S:e5! K:e5 (first thematic variation – 2.Ta5+ (2.Te2+? K:d6!) Kf6: 3.Tf5+ K:f5 (2nd thematic variation on another square) 4.Te2 Kf6 5.Te6+ Kf5 6.Dg4+ hg4#

F13 - 1.Le8! K:e8! 2.Tf6 Kd7 3.c8=T! Ke8 4.Lb6+ Kd7 5.b8=S+ K:c8! 6.T:d6 a:b6 7.S:a6 T:a6#.

F14 - 1.Sf7+ Kh7 2.Tg8+ K:g8 3.d:e8T+ K:f7 4.Td7+ K:e8 5.Td8+ K:d8 6.Dc8+ K:c8 7.a:b8D+ D:b8#

F15 - 1.Lh8! K:h8 2.Sg6+ Kh7 3.Te7 K:g6 4.Lf5+ K:f5 5.Sf4 K:f4 6.Tf3+ K:f3 7.Df2+ ef2#

F16 - 1.e8D+! K:c7 2.Dc8+ K:c8 3.Dd8+ K:d8 4.h8T+ Ke7! (4.- Kd7 f8T+ is shorter) 5.Te8+ Kd7 6.f8T+ Kc6 (bK rundlauf) 7.Tc8+ Lc7# (all White moves on top rank) 1.- Kc5 2.Dhe7+ Kc4 3.Dc5+ K:c5 4.f8D+ Kc4 5.Dc5+ K:c5 6.Dc6+ K:c6 (bK switchbacks) 7.c8T+ Lc7#

F17 - 1.Le3+ Kc3: 2.Tc2+ Kc2: 3.Dc5+ Kb1 4.Dh5: c5 5.Lc5: Kc2 6.Dd1+ Kc3 7.Sb2: Lb2:#; (4.- Kc2 5.Dd1+ Kc3 6.Sb2: c5 7.Lc5: Lb2:#), 1.- Kb1 2.Te1+ Kc2 3.Sb4+ Kc3: 4.Se4+ Kc4 5.Tb1! c5 6.Dd8!! h4 7.gh: cb:#; 5.- h4 6.gh: c5 7.Dd8 cb:#

F18 - 1.Sf6! K:f6 2.e8=S+ Kf5 3.Sf6 K:f6 4.g8=S+ Kf5 5.Sf6 K:f6 6.Dg7+ Kf5 7.De5+ d:e5#

F19 - 1.f8D! f4 2.Tb5! Kb5: 3.Sc5 Kc5: 4.Td5+ Kd5: 5.Le6+ Ke6: 6.Df5+ Kf5: 7.Sd4+ Sd4:# 5 sacrifices without capturing of black pieces, 2 without check.

F20 - 1.b8D! a3 2.Td7! K:d7 3.Lc6+! K:c6 4.Db5+! K:b5 5.Da4+! K:a4 6.Sa7 Kb3 7.Sb2 a:b2#

F21 - 1.a5 f3 2.Ld3! f2 3.Le2 f4 4.h5 f3 5.Ld3 K:d3 6.Dc5 b5 7.a:b6 ep Se3#, (5.- f2 6.Le2 Se3#) 2.- K:d3 3.Dc5 f2 4.h5 f4 5.h6 f3 6.h7 b5 7.a:b6 ep Se3#

F22 - 1.c3? L:c4!; 1.Lg2! Lb1 2.T:b1 bc 3.Lf1 c3 4.Td4+ K:d4 5.Df4+ Kd5 6.Td1+ Kd3#; (2.Lf1? L:c2 3.T:c2 bc 4.Tf2 c3 5.Tc4 c2 6.Df3+ K:f3#, no 2.- La2!), 1.- Lb3 2.Td4+ K:d4 3.c3+ K:c4 4.Df4+ Kd3 5.Dd2+ Kc4 6.Lf1+ Kd3#; (2.Te2? Kd4 3.c3+ K:c4 4.Ld5+ K:d5 5.Td2+ Kc4 6.Df1+ Kd3#, no 2.- K:c4!); 1.- L:c4 2.Td1+ Ld3 3.c4+ bc 4.Lf1 c3 5.Td4+ K:d4 6.Dd3+ K:d3#; 1.- bc 2.c3 Lb3 3.T:c4+ K:c4 4.Df4+ Kd3 5.Dd2+ Kc4 6.Lf1+ Kd3#, 2.- Lb1 3.Td1+ Ld3 4.b5 Kc5 5. f2+ Kd5 6.Tf4+ Kf3#.

F23 - 1.Lf7? f1-L!; 1.Df5? f1-L 2.Sb7+ d6 3.Ld5+ Kb5 4.Dd3+, 1.- f1-S!; 1.a6! f1-L 2.Tb6+ (2.Sb7? d6) 2.- K:b6 3.Sc8+ (i) Kb5 4.Dd3+ L:d3#, (i) 3.Sb5+? K:b5; 4.Dd3+. 3.- d6, 1.- f1-S 2.Ld5+ Kd5 3.Dg2+ Kd4 4.Dd2+ Sd2:#

F24 - 1.Kb4! a6 2.Da7 a:b5 3.d6 e:d6 4.T:e4+ K:e4 5.Sd5 K:d5 6.Lc6+ K:c6 7.Dc5+ d:c5#

F25 - 1.Dc6! - 2.Te5:+(A) Ke5: 3.Df6 Ke4 4.Lf5+(B) Tf5: 5.Sg3:+ Sg3:#; 1.- S- 2.Lf5+(B) Kf5: 3.De6+ Ke4 4.Td4(C) Td4 5.Sd2: D(T):d2#; 1.- Se3!? 2.Td4(C) Kd4: 3.Dc3 Ke4 4.Te5:+ Te5: 5.Dd3+ Ld3:#. Cyclic white 2nd & 4th moves. Cyclic arrivals of BK & BR on e5,f5 & d4. BS correction.

F26 - 1.Db5? ~ 2.Te4+ K:e4 3.Df5+ Kd4 4.Df4+ S:f4#, but 1.- fg1S!; 1.Se5! (2.D:a7+ Ke4/Kd5 3.Lb7/Lc4+ Kf4/Ke4 4.De3+ S:e3#); 1.- fg1S 2.De4+ K:e4 3.S:f3+ K:f3 4.Le2+ S:e2#; 1.- fg1L 2.Dd5+ K:d5 3.Sc6+ K:c6 4.Tc5+ L:c5#

F27 - 1.Td7!  (S:d7) 2.Le6+ ! K:e6 3.Sc5(Dg8)+ Kf5 4.Dg6+ hg6#; 1.- D:b4 2.T:f4+! K:f4 3.Lg5+ Kf5 4.Dg4+ D:g4#; 1.- Db5(a5) 2.Sd4+ Ke5 3.Lf6+ ! K:f6+ 4.Dg5+ D:g5#; 1.- Dc6 2.Lg6+ Ke6 3.Lf5+ ! K:f5 4.Dg6+ D:g6,hg#; 1.- D:d7 2.e4+ fe3 e.p. 3.Tf4+ ! K:f4 4.Dg4+ D:g4#; (1.- hg2 2.Te7 g1T! 3.S:g1 ~ 4.Lg6+ hg#)

F28 - 1.d4! zz e:d3 e.p. 2.T:d3 Ke4 3.Tf3+! K:f3! 4.La4 b3 5.Sc4 b2 6.Dh7! b1=D/T/b1=L/b1=S 7.Ld1+/Dd3+/Sd2+ D,T:d1#/L:d3#/S:d2#. e.p. & white AUW.

F29 - 1.Dg4? d5! 1.Dh7? d6! 1.De8? dc6!; 1.Tb7? 1.- d5 2.Td7 d4 3.Td4 Tf1#, 1.- dc6!; 1.Le8? 1.- d5 2.Sb5 d4 3.Sd4 Tf1#, 1.- dc6!; 1.Ld5? dc6!; 1.- d6 2.De8 Kd5 3.De3 Tf1#; 1.Dg7! 1.- dc6 2.Sc6: Kc6: 3.Dd4 Tf1#, 1.- d6 2.Sd6: Kd6: 3.Dg5 Tf1#, 1.- d5 2.Ld5: Kd5: 3.De7 Tf1#.

F30 - 1.Ta5! (2.Ld5+ K:f5 3.Le6+ K:e6 4.Te4+ L:e4#); 1.- b5/b:a5 2.Td6+ Ke5 3.Te6+ K:e6 4.Sd4+ L:d4#; 1.- S:g6 2.Sg7+ Ke7/Kf7 3.Se6+ K:e6 4.Lf5+ L:f5#; 3.- Ke8 4.L:g6+ L:g6#, (1.- Sf3 2.Ld5+ K:f5 3.g7+ Kg5 4.g8D/T+)

F31 - 1.Se8!(2.T:e6+ K:e6 3.Df5+ Ke7 4.d8D+ S:d8#); 1.- L:c7 2.De4+ K:e4 3.T:e6+ Le5 4.Sd6+ S:d6#; 1.- a5 2.L:d4+ K:d4 3.T6f4+ Ke5 4.D:b5+ Sc5#

F32 - 1.Th8! (zz) c:b5 2.T:d6+ K:d6 3.Se8+ Kc6 4.De6+ L:e6#; 1.- c5 2.T:e7+ K:e7 3.S:d5+ (3.Te8+!? Kf6!) Kf7 4.Dd7+ L:d7#

F33 - 1.Da7! Dh7 2.Le3:+ Ke3: 3.T5c3+ Kf4 4.Dd4+ De4 5.De5+ De5:#; 2.- Le3: 3.Td5:+ Kd5: 4.Lc6:+ Kd6 5.Dd4+ Ld4:#; 1.- Lf4 2.Td5:+ Kd5: 3.Da5+ Kd6 4.Dc7+ Kd5 5.De5+ Le5:#; 1.- Lh7 2.Td5:+ Kd5: 3.Lc6: Kd6 4.e8S+ De8: 5.De7+ De7:# 4 X 1 sacrifice.

F34 - 1.Dg7! (2.Tf4:+ Kf4: 3.Sd3+ Ke4 4.Lf5+ Kf5: 5.c8=D+ Ke4 6.Dg4+ Kd3: 7.Sb4+ ab4#); 1.- a4 2.Lf5+ Kf5: 3.Sd4+ Ke4 4.Tf4:+ Kf4: 5.Tf3:+ Ke4 6.d3+ Kd4: 7.Sb3+ ab3#. Two immediate (reciprocal) sacrifices and one delayed sacrifice.

F35 - 1.Sg4! (2.Th5! ~ 3.Da8! ~ 4.d8S+ ! Kf8 5.Da3+ Tb4 6.Lg7+ D:g7)#; 3.- Db1 4.Df8+! K:f8 5.Te8+ Kf7 6.Lg6+ D:g6#); 1.- Db1 2.Df8+! K:f8 3.Tg8+ Kf7 4.Tf8+ ! K:f8 5.Te8 Kf7 6.Lg6+ D:g6#; 1.- T ~ 2.Te7+! K:e7 3.Lc5+ Kf7 4.Le6+! K:e6 5.Dd6+ Kf7 6.h8S+ D:h8#; 1.- T:b5 2.Df8+! K:f8 3.Tg8+ Kf7 4.h8S+! K:g8 5.Lh7+ Kf8 6.Lg7+ D:g7#; 1.Th5 ? T:b5!

F36 - 1.g8D! Sc6 2.Te5+ Ke5: 3.Tf5+ Kf5: 4.Df6+ Kf6: 5.Sd7+ Kf5 6.Sd4+ Sd4:# 3 sacrifices.

F37 - 1.Se7 Se2 2.Ld4+ S:d4 3.Tb7+ K:b7 4.Tc7+ K:c7 5.Dc8+ Kd6 6.e5+ K:e7 7.Sf5+ S:f5#

F38 - 1.Lb8! K:b8! 2.Sc7! K:c7! 3.Tc6+! K:c6! 4.Sd5! K:d5! 5.Le4+! K:e4! 6.Df3+! K:f3! 7.T:g4 e2#. Six thematic moves - task like.

F39 - 1.Lc7 K:c7 2.Ld7 K:d7 3.Te7+ K:e7 4.Sf6 K:f6 5.Sf5 K:f5 6.T:f4+ K:f4 7.Dg4+ h:g4#

F40 - 1.c6! (2.Df6+! Kd5 3.D:e6+! Kc5 4.D:c4+ K:c4#); 1.- D:c6 2.Df4+! Kd5 3.D:e4+! Kc5 4.D:d4+ K:d4#

F41 - 1.Sg7! (2.T:e5+ K:e5 3.Dh2+ S:h2#); 1.- Se6 2.T:e3+ K:e3 3.T:e5+ S:e5#; 1.- b:c3 2.Td4+ K:d4 3.Sf5+ g:f5#

F42 - ** 1.- Ta~ 2.S:c6+ K:c6 3.S:b4+ D/L:b4#; 1.Dd7! (2.S:c4+ K:c4 3.D:c6+ S:c6#); 1.- Dc2 (d1,etc) 2.Dd6+ K:d6 3.S:c4+ T:c4#; 1.- Ld2 2.D:d4+ K:d4 3.S:c6+ S:c6#. 4 thematic sacrifices with battery play

F43 - 1.Db5!(2.S:e4+ K:e4 3.Sc5+ Kd5 4.Sb3+ Ke4 5.Sd2+ L:d2#); 1.- g5 2.S:e6+ K:e6 3.Sc5+ Kd5 4.Sd7+ Ke6 5.Sf8+ L:f8#; 1.- e3 2.T:d4+ K:d4 3.Db2+ Kd5,Kc4 4.Db3+ Kd4 5.f:e3+ L:e3#

F44 - 1.Ld3! zz bc1L 2.Dc8+! K:c8 (1) 3.e8D+ K:b7 4.c8S+ K ~ 5.Se7+ K ~ 6.Sc6+ Kb6 7.De3+ L:e3#; 1.- bc1S 2.De8+! K:e8(2) 3.c8T+ K:f7 4.e8L+ K ~ 5.Lf7+ Kg7 6.Tg8+ Kh7 7.f6+ S:d3#; 1.Tb6 !? bc1S! 1.- K:c7 2.e8D+! K:b6 (3) 3.D:d6+ Ka5 4.Da8+ K:b5 5.Tc7! bc1L 6.Dac6+ Ka5 7.Da3+ L:a3#; 1.- bc1L 2.c8L+ ! Kc7 3.e8D+ K:b6 (4) 4.Dc6+ Ka5 5.Ta7+ Kb4 6.D:d6+ Kb3 7.Da3+ L:a3#. Theme + AUW

F45 - 1.c6 (>[1.- b2] 2.Le6 ~ 3.Df8+ K:e6 4.Te7+ Kd6 5.Lh2+ K:c6 6.Tb6+ a:b6#); 1.- g5 2.Se5 g:h4 3.Dd8+ K:e5 4.Dg5+ Kd6 5.Td8+ K:c7 6.Lb6+ a:b6#; 1.- h5 2.Te7 ~ 3.D:g6+ K:e7 4.Dg5+ Kd6 5.Td8+ Kc7 6.Lb6+ a:b6#

F46 - 1.b7!(2.b8=D+ Sc7 3.Db6+ ab6: 4.e8=S+ Se8:#); 1.- Sc3 2.Tc5:+(Td5+?) Kc5: 3.Dc4+ Kd6 4.Dd4+ Sd5#; 1.- Sd4 2.Td5+(Tc5:+?) Kd5: 3.De4+ Kd6 4.Dc6+ Sc6:#

F47 - 1.Dg2! (2.Ld5+ K:d5 3.Dg8+ Kc6 4.Da8+ Tb7#); 1.- Sg3 2.S:c5+ Se4 3.Lb8+ K:c5 4.L:a7+ Tb6#, 1.- Sf4 2.L:c5+ Se6 3.Sd6+ K:c5 4.Sb7+ T:b7#. Two delayed sacrifices on the same square; play of batteries!

F48 - 1.De5+/Df6+? both fail to 8.Te4!; 1.Td2+! Td2: 2.De5+! Kc5 3.Sc6:+ (A) Kc6: (x) 4.Sb4+ Kc5 5.Sd5:+ (B) Kc6 6.Dc7+ Kd5: (y) 7.Dc4:+ Kc4:# (2.Df6+!? 7.Td7:!); 1.- cd2: 2.Df6+! Kc5 3.Sd5:+ (B) Kd5: (y) 4.Sb4+ Kc5 5.Sc6:+ (A) Kd5 6.Df7+ Kc6: (x) 7.Dd7:+ Kd7:# (2.De5+!? 7.Tc4:!)

F49 - 1.Sc7! (2.T:e4+ Ke4: 3.Lg6+ Ke3 4.De8 Le8:#); 1.- Ta1 2.T:e4+ K:e4 3.Lg6+ Ke3 4.De8+ L:e8#; 1.- d:c2 2.D:d4+ K:d4 3.Lc5+ Kd3 4.Td7+ L:d7#; 1.- g:h2 2.Lf4+ K:f4 3.Sd5+ Kf5 4.Dc8+ Ld7#

F50 - 1.Lf5? zz, a6!; 1.- c:d3 2.Td5+(A) Kc4 3.Se3+ L:e3#; 1.- g:f4 2.T:c4+(B) Kd5 3.Tb5+ Lc5#; 1.L:a7 zz, 1.- c:d3 2.Tc4+(B) K:c4 3.Se3+ L:e3# ; 1.- g:f4 2.Td5+(A) K:d5 3.Tb5+ Lc5#

F51 - 1.Tc1! (2.S4c3++ Kc4 3.S:b5+ K:b5 4.Dd5+ L:d5#); 1.- d:e2 2.Sc5+ K:d4 3.Sd3+ K:d3 4.Dd5+ L:d5#; 1.- g4 2.Sd6+ Ke6 3.Sf5+ K:f5 4.Dd5+ L:d5#. Three pull-in-sacrifices!

F52 - 1.Sf7!(2.Tf4:+ Kf4: 3.De4+ Le4:#); 1.- Le6 2.Df6+ Kf6: 3.Tf4:+ Sf4:#; 1.- Lf7: 2.Dg5+ Kg5: 3.Te5+ Se5:#; (1.- De7: 2.Te5+ De5: 3.Sd4:+ T/Dd4:#), 1.Sf3? De7:!

F53 - 1.Ld6+! Kd4 2.Db6+ Kc3 3.Lb4:+ Kb2 4.Lc3+ Kc3: 5.Sc4:+ Kc4: 6.Tc3+ Kc3: 7.Db4+ Db4:#; 2.- c5 3.Le5+ Ke5: 4.Dd6+ Kd6: 5.b8L+ Kc6 6.fe8:D+ Kb6 7.Db5+ ab5:#

F54 - 1.Db4! (2.D:c3+ K:c3 3.Lf6+ Ld4#); 1.- Sb5 2.Dc5+ K:c5 3.Le3+ Le3#; 1.- Se6 2.D:c4+ K:c4 3.Th4+ Ld4#; 1.- d5 2.Dc5+ Ke5 3.De3+ L:e3#

F55 - 1.Td3! (2.L:e4+ K:e4 3.Dg6+ Kf3 4.Dg4+ Ke4 5.f5+ K:d3 6.Sf2+ ef2#); 1.- Tc4 2.Sd4! L:d4 3.Le4+ K:e4 4.Dg2+ K:d3 5.Dd5 ~,e:d5 6.Sf2 ef2#; 2.- T:d4 3.T:e3+ K:e3 4.Dg1+ Kf3 5.Dg4+ Ke3 6.D:e2+ L:e2#, (1.- T:e5 2.L:e5 (~ 3.T:e3,L:e4) Ta1 3.T:e3 K:e3 4.Dg1+ Kf3 5.Dg4+ Ke3 6.D:e2+ L:e2#; 3.- L:e3 4.Sd4+ L:d4 5.Dg4+ Ke3 6.D:e2+ L:e2#), (1.- T:f4 2.Le4+ K:e4 3.Dg2+ Tf3 4.D:f3+ K:d3 5.Tf4~ 6.D:e2+ L:e2#), (1.- Td4 2.T:e3+ K:e3 3.Dg1+ Kf3 4.Dg4+ Ke3 5.D:e2+ L:e2#)

F56 - 1.Dd8! (2.Ld4+ (A) 2.K:d4 3.Df6+ (B) Le5#); 1.- c:d5 2.Df6+ (B) K:f6 3.Ld4+ (A) Le5#; 1.- c:d6 2.T:e4+ (C) K:e4 3.T:e6+ (D) Le5#; 1.- T:f7 2.T:e6+ (D) K:e6 3.T:e4+ (C) Le5#

F57 - 1.b8=L! (2.De6+! K:e6 3.c8=D+ Kf7 4.L:g6+ L:g6#); 1.- g:h5 2.Dc6+! K:c6 3.c8=T+ Kd7 4.Lf5+ L:f5#; 1.- Te4 2.Dd7+! K:d7 3.c8=L+ Kc6 4.L:e4+ L:e4#

F58 - 1.Db7! (2.Te5+ Te5: 3.Db4:+ Db4:#); 1.- Te3~ 2.Ld6+ Kd6: 3.Db6+ L/ab6:#; 1.- Td3 2.Te5+ Td5 3.Db4:+ Db4:#; 1.- Se6: 2.Tc4+ Kc4: 3.Db5+ Tb5:#; 1.- Da2: 2.Tc4+ Dc4: 3.Db4: Db4:#

F59 - 1.Td8? Tg8! (6.- T:e8!); 1.Td7! (2.T:e4+ L:e4 3.Sd5+ Kd4 4.S:b6+ Ke3 5.D:e4+! K:e4 6.Te7+ Kd4 7.L:f2+ Se3#) Lh5! 2.L:f2+! K:f2 3.S:e4+ Ke3 4.Sf2+!! K:f2 5.Dh4+ Ke3 6.Te4+! K:e4 7.De1+! Se3# (1.- Lh5 2.T:c3+? L:c3 3.Sd5+ 4.S:b6+ 5.D:e4+ 6.Te7+ Le5!!). Threat including four consecutive thematic sacrifices, sacrificial squares e4 (2x) and f2 (2x), thematic units Q,B,S,R.

F60 - 1.Ld3 (2.De6+ A K:e6 3.L:c4+ B Td5#); 1.- e4 2.L:c4+ B K:c4 3.De6+ A Td5#; 2.- Ke5 3.Dc7+ Td6#; 1.- Sc6 2.D:c6+ C K:c6 3.Le4+ D Td5#; 1.- S:b5 2.Le4+ D K:e4 3.Dc6+ C Td5#; 1.- c:d3 2.Td7+ Kc4,e4 3.c:d3+ T:d3#; 1.- Td8 2.D:d8+ Kc6/Ke6 3.Le4+/L:c4+ Td5#

F61 - 1.a5+ K:a5 2.Lb4+ Kb6 3.La5+ K:a5 4.D:a3+ Kb6 5.Da5+ K:a5 6.Sfd6 Kb6 7.Sc4+ T:c4#

F62 - 1.Dg1! (2.Tf5:+ Kf5: 3.Tf7+ Ke5 4.Lf6+ Kf5 5.Le7+ Ke5 6.Ld6+ Ld6:#); 1.- d2 2.Lf4:+ Kf4: 3.Dg4+ Ke5 4.Dg3+ f4 5.Dg5+ Lf5 6.Sd3+ Sd3:#; 1.- Sc4 2.Te6:+ Ke6: 3.d8S+ Ke5 4.De1+ Se3 5.Te7+ De6 6.Sc6:+ Tc6:#; Vacation of initial squares f7,g5,e7. Tries: 1.Dg2? Sc4! 1.Lh4? d2!

F63 - 1.De7! (2.Le3+ S:e3+ 3.D:e3 L:e3#); 1.- D:f3 2.Se6+(A1) Ke4 3.Sd4+(A2) K:d4 4.Le5+(B1) Ke4 5.Ld4+(B2) K:d4 6.De5+ K:e5#; 1.- h:g2 2.Le5+ (B1) Ke3 3.Ld4+(B2) K:d4 4.Se6+(A1) Ke5/Ke3 5.Sd4+(A2) K:d4 6.De5+/De3+ K:D#; 1.- Sd2 2.Sb3+ S:b3 3.D/Le3+; 1.- Dg5 2.L:g5 (3.Le3+ 4.D:e3+) 2.- f4 3.Se6+ Ke5 4.Sd8+ Kd4 5.c5+ Kd5 6.Sf4+, 4.- Kf5 5.g4+ Kg6 6.Sf4+, 1.- Dh6 2.L:h6 (3.Le3+ 4.D:e3+) 2.- h:g2 3.Se6+ Ke5 4.S:d8+/Sd4+. Reversed seqence of sacrifices

F64 - 1.Ta7! (2.D:b5+ Kb5: 3.Sd6+ Kb6 4.Tb7+ Tb7:#); 1.- Tb4 2.D:d5+ K:d5 3.Sb6+ Kd6 4.Td7+ T:d7#,1.- Kb4 2.D:b5+ K:b5 3.Sd6+ Kb5 4.Tb7+ Tb7:#; 1.- Sb2 2.D:c5+ K:c5 3.Sa6+ Kc6 4.Tc7+ Tc7:#

F65 - 1.Ld8! (2.Le6+ Kd6 3.Sf5+ Ke5 4.Sg3+ Kd6 5.S:e4+ T:e4#); 1.- Td3 2.L:e4+ K:e4 3.Te5+ K:e5 4.T:c6+ Ke4 5.Dd4+ T:d4#, 1.- c5 2.Td6+ K:d6 3.De5+ K:e5 4.Lg4+ Kd6 5.Td5+ L:d5#.

F66 - 1.Tc2! (2.L:d6+ K:d6 3.Sf5+ Kc7 4.T:c5+ L:c5#); 1.- S:e7 2.S:d5+ K:d5 3.De5+ K:e5 4.T:c5+ L:c5#; 1.- S:f6 2.S:d5+ K:d5 3.Te5+ K:e5 4.T:c5+ L:c5#

F67 - 1.Te8! (2.S:d6+! K:d6 3.Th6+ L:h6#); 1.- Lc6 2.S:d5+! K:d5 3.Th5+ Lg5#; 1.- T:h4 2.S:d4+! K:d4 3.T:h4+ Lf4#; 1.- T:f2 2.S:d4+! K:d4 3.e3+ L:e3#

F68 - 1.Lf8 (2.S:f6+ K:f6 3.Lg7+ K:g7 4.Dh6+ T:h6#); 1.- S:g4 2.Df4+ K:f4 3.Sg6+ Kf5 4.S:g3+ S:g3#

F69 - 1.Dg3!(zz) dc5 2.Td4+ K:d4 3.Tf4+ Ke5 4.Td4+ K:d4 5.De3+ L:e3#; 1.- cd3 2.Te4+ K:e4 3.Tf4+ Ke5 4.Te4+ K:e4 5.De3+ L:e3#; 1.- Lg4 2.L:d6+ K:d6 3.T:g4+ Kc5 4.Dd6+ K:d6 5.d4 L:f2#, (1.- L:f5 2.Ld4+ Ke6 3.Te4+ L:e4 4.de)

F70 - 1.d8=T! (2.Tf8 ~ 3.Tf5+ e:f5 4.Sg4+ h:g4,f:g4#); 1.- Lb7 2.Sc6+ L:c6 3.Ld5+ K:d5 4.Te5+ K:e5#, 1.- Ta7 2.Sf7+ T:f7+ 3.Lf5+ K:f5 4.Dg6+ K:g6#

F71 - 1.Lh6! (zz) Lc2 (Ld3) 2.Te4:+ Ke4: 3.De5+ Ke5: 4.Te6+ Kd4 5.Le3:+ Le3:#; 1.- Ld2 2.Td5:+ Kd5: 3.Dd4+ Kd4: 4.Tc4+ Ke5 5.Te4:+ Le4:#; (1.- Lb2: 2.Te4:+ Ke4: 3.Tc4+ Ld4 4.Tb4: L-#)

F72 - 1.Df8! (2.T:d4+ K:d4 3.Dg7+ Ke4 4.Te5+ Kd4 5.T:f5+ Ke4 6.T:f4+ K:f4 7.Dg4+ L:g4#); 1.- a:b5 2.L:f5+ K:f5 3.Dc8+ Ke4 4.Te6+ Kf5 5.Tf6+ Ke4 6.T:f4+ K:f4 7.Dg4+ L:g4#

F73 - 1.Se6! (zz) K:e3 2.S:c4+ Ke4 3.Se3! K:e3 4.Ta4 Lb2#; 1.- K:f5 2.S:g7+ Ke4 3.Sf5! K:f5 4.The7 Lb2#; 1.- K:d5 2.S:c7+ Ke4 3.Sd5! K:d5 4.Tae7 Lb2#

F74 - 1.Ld6? Tf8!; 1.Lf6?(2.Df4+ (A) Kf4: 3.Td4+ (B) Le4#); 1.- e5 (a) 2.Td4+ (B) Kd4: 3.Df4+ (A) Le4#,1.- Sc4 2.Dd5+ Kd5: 3.Lf3+ Le4#, 2.- Kf4 3.Dd4+ Le4#, 1.- ef2!; 1.Lb8! (2.Td4+ (B) Kd4: 3.Df4+ (A) Le4#); 1.- e5 (a) 2.Df4+(A) Kf4: 3.Td4+ (B) Le4#, 1.- Sc4 2.Dd5+ Kd5: 3.Lf3+ Le4#, 1.- ef2 2.De3+ Ke3: 3.Te6+ Le4#.

F75 - * 1.- c:d1L 2.Le5+ K:e5 3.Te7+ Kd4 4.Se6+ Ke5 5.S:f4+ Kd4 6.Se2+ L:e2#; 1.- c:d1S 2.T:d5+ K:d5 3.Tf5+ Kd4 4.Le5+ Kd5 5.L:f4+ Kd4 6.Le3+ S:e3#. 1.Dg1? (zz) 1.- Sg5!; 1.- f:g1L 2.T:d5+ K:d5 3.Tg5+ Kd4 4.Le5+ Kd5 5.L:f4+ Kd4 6.Le3+ L:e3#; 1.- f:g1S 2.Le5+ K:e5 3.Te7+ Kd4 4.Se6+ Ke5 5.S:f4+ Kd4 6.Se2+ S:e2#; (1.c6? thr. 2.Le5+ K:e5 3.Te7+ Kd4 4.Se6+ Ke5 5.Sc5+ Kd4 6.Sb3+ S:b3#, 1.- Sg5!), 1.Df1! (2.T:d5+ K:d5 3.Lb7+ Kd4 4.Sc6+ Kd5 5.Sa5+ Kd4 6.Sb3+ S:b3#); 1.- g:f1L 2.Le5+ K:e5 3.Te7+ Kd4 4.Se6+ Ke5 5.S:f4+ Kd4 6.Se2+ L:e2#; 1.- g:f1S 2.T:d5 K:d5 3.Tf5+ Kd4 4.Le5+ Kd5 5.L:f4+ Kd4 6.Le3+ S:e3#. 3 - phase change of 2 defence!

F76 - 1.Ld1!(2.Td4:+ Kd4:+ 3.Dd5+ Ld5:#); 1.- Sb3 2.Tc3:+ Kc3: 3.Sb7+ Sc5#; 1.- Tab3 2.Sb3:+ Kb3: 3.Da4+ Ka4:#; 1.- Tbb3 2.Sd3:+ Kd3: 3.Db5+ Tb5:#

F77 - 1.Lb6! Ld2 2.Da8+ K:a8 3.L:c6+ Kb8 4.La7+ Kc8 5.L:g2+ Kd8 6.Th8+ Kd7 7.Lh3+ L:h3#; 1.- L:e2 2.Dc8+ K:c8 3.T:c6+ Kb8 4.Th8+ Kb7 5.T:c3+ Ka6 6.Ta8+ Kb5 7.Tb3+ Lb4#.

F78 - Tries:!. La7? (2.Se5:+(A) Ke5: 3.Se6:+ Lf5#) Sb6:!(b); 1.Tb5? (2.Se6:+(B) Ke6: 3.Se5:+ Lf5#) Sc7! (a); 1.Td6? (2.Se5:+(A) Ke5: 3.Sg5~+ Lf5#) Sc7:!(a); 1.Ld6? (2.Se6:+(B) Ke6: 3.Se5:+ Lf5#) Sb6:!(b), Key: 1.Ta6! waiting 1.- Sc7(a) 2.Se5:+(A) Ke5: 3.Se6:+(B) Lf5#; 1.- Sb6(b) 2.Se6:+(B)+ Ke6: 3.Se5:+(A) Lf5#; 1.- b3 2.Ta8: waiting b2 3.Le5: Lb1~#; 1.- e4 2.fe4:+ Le4:#. Dombrovskis+ Hannelius, White Grimshaw,Reciprocal change

F79 - 1.Ld2! (2.Df6:+ Kf6: 3.f8T+ Ke7 4.Lb4+ Lb4:#); (2.- Sf6: 3.f8S++ K- 4.Lb4+ Lb4:#); 1.- f5 2.De7+ Ke7: 3.f8L+ Kf6 4.Lc3+ Lc3:#; 1.- ab6: 2.Dd7+ Kd7: 3.f8S+ Kd6(Ke7) 4.Lb4+ Lb4:#; 1.- fg5: 2.Dd6+ Kd6: 3.f8D+ Ke5 3.Lc3+ Lc3:#. 4 WQ sacrifices + AUW + BK cross

F80 - 1.Dd6 Sf6 (2.Tb3 S:d7 3.D:d7 ~ 4.Tc3+ Kb4 5.Td3+ Kc4 6.Td4+ cd#); 1.- D:h6 2.D:c5+ K:c5 3.Tb5+ Kc4 4.Tc5+ K:c5 5.b4+ Kc4 6.Sb6+ D:b6#; 1.- Lh5 2.D:d5+ K:d5 3.Lc6+ Kc4 4.Ld5+ K:d5 5.Tbd7+ Kc4 6.Td4+ cd#

F81 - 1.Dd6+? K:d6/Kd4! 2.L:f4+/?; 1.Sd1! (2.L:f4+! K:f4 3.De3+ S:e3#; but not 2.Dd6+ K:d6! 3.L:f4+? Le5!); 1.- L:c1 2.T:f5+! K:f5 3.D:d5+ L:d5#; 1.- Ld4 2.D:d4+! K:d4 Kd6 3.Lb2+/D:f4+! Sc3/S:f4#; 1.- T:e6 (3.- T:e3!) 2.T:e6+! K:e6 3.De7+ S:e7#; 1.- Sc4 (3.- Sc:e3+!) 2.D:d5+! K:d5 3.b:c4+! K -#. Threat including five thematic sacrifices, sacrificial squares f4,f5,d4,e6,d5 (including tries also d6)

F82 - 1.Sc8 (2.Dc5+ Ke5 3.Dd4+ K:d4 4.Lb2+ Sc3#); 1.- S:d7 2.S:e6+ L:e6 3.T:e4+ K:e4 4.Df4+ S:f4#; 1.- De5 2.D:e5+ K:e5 3.S:f7+ Kd4 4.Lb2+ Sc3#; 1.- Te5 2.D:d5+ K:d5 3.T:d3 ed 4.Td4+ K:d4#; 1.- e2 2.T:d3 K:d3 3.Da3+ Kd4 4.Lb2+ Sc3#

F83 - 1.Dd8 thr. 2.D:f6+ K:f6 3.Sd5+ Ke6 4.Te8+ Kd7 5.S:f6+ L:f6#; 1.- L:c4 2.L:f7+ K:f7 3.D:f8+ Ke6 4.Te8+ Kd7 5.Df7+ L:f7#; 1.- b:c5 2.L:f5+ K:f5 3.Se3+ Ke6 4.De8+ K:d6 5.Sf5+ D:f5#; 3 - times the theme followed by sacrifices on the same squares.

F84 - 1.L:e3! (2.Lf4+ S:f4#); 1.- Dd2 2.T:d5+ K:d5 3.L:e6+ Ke5 4.Ld5+ (Lf5+?) K:d5 5.Dh5+ Se5#; 1.- Ld2 2.L:d4+ K:d4 3.S:e6+ Ke5 4.Sd4+ (Sg7+?) K:d4 5.Dh8+ Se5#; (1.- d:e3 2.D:e6+ Kd4 3.Df6+ Se5#)

F85 - 1.Scd3! (2.Tc4:+ Kc4: 3.Sb2+ Kd4 4.Sf3+ Tf3:#); 1.- Sc5 2.Dd5:+ Kd5: 3.Sb4+ Kd4 4.Td6+ Sd6:#,1.- e4 2.Lc3:+ Kc3: 3.Db4+ Kd4 4.Te4:+ Le4:#. Cyclic sacrifices and unpins. Cyclic Zilahi in a selfmate.