Section G: Fairies

Judges: France, Great Britain, Slovakia, Slovenia, Yugoslavia

Reserve Judges: Switzerland

Theme:

Direct-mates in 3 or more moves with the condition "one set of chessmen": a pawn can promote only to a piece whose equivalent has already been removed from the board by capture. Either side may have 2 Bishops on squares of the same colour, but neither side can ever have 3 Bishops or 2 Queens at the same time. The way the condition is applied defines the type of problem:

Type 1: A pawn on the 7th/2nd rank cannot advance to the promotion square until a piece of its own side is captured.

Type 2: If a pawn reaches the promotion square before any piece of its own side is captured, it remains dormant until a piece is captured, whereupon it at once takes the power of that piece. In the case of more than one dormant pawn, the side making the capture decides which of the opponent's dormant pawns takes the power of the captured piece. A dormant pawn cannot move but may be captured.

Composers are free to choose between the two types.

Any legal diagram-position which complies with the rules of the chosen fairy condition is allowed (including positions with 2 Bishops on squares of the same colour)

Question 1:
The formulation "one and the only complete set of the chess pieces" can be treated as obligation that 8 pieces from both sides must be present on the chessboard. And only the bishops may be one-squared (one-colored) that is one of them may be promoted. In this case for the legality of the setting there must be not more than seven (7) pawns on the chessboard.
If there are seven (7) white pieces on the chess board then it is asked if the pawn on the seventh line can be promoted into the missing piece?
Must the concept "the only complete set of the chess pieces" be treated only as reflexial promotion of the pawn of the types (ordinary and sleeping) obligatory following after withdrawing of any piece, present on the diagram?

Answer:
It is not required that all 8 officers (pieces which are not pawns) are present on the board.
- If one officer is missing, then a pawn arriving at the promotion rank is immediately (and automatically) promoted to the missing officer.
- If more than one officer are missing, then a pawn arriving at the promotion rank is immediately promoted to one of missing officers (as chosen by the promoting side).
- If two bishops of the same color are on the board, one of them has obviously been promoted. Thus, 8 pawns on the board are illegal in this case.
- A pawn arriving at the promotion rank remains dormant ("sleeping") ONLY when all 8 officers of its color are on the board (NOTE: this refers to Type 2!).

Question 2:
The diagram positions - must they be legal beyond the rules which are pertinent to the Single Box condition? In other words, must there be a proof game - with normal orthodox rules applied - which shows, that the problem position can be reached from the normal initial game array?

Answer:
The history of the diagram position is irrelevant, and no theoretical or practical proof game is needed (only in the case of two Bishops of the same colour, no more than 7 pawns are allowed for the side who has them). The position must be "legal" only in the sense that it follows the definition of the chosen fairy type, e.g. for both types there should not exist on the board at any stage additional pieces to those contained in a "single box" etc. (see theme definition).

Question 3:
1. Are multiple solutions allowed?
2. Are twins allowed? If so, zeropositions also?
Reply: Multiple solutions or twins are not allowed.

Reply: Multiple solutions or twins are not allowed.

Question 4:
On the question submitted by Israel (Section G) and the reply, I am concerned.

Does this reply mean that entries where the logic of the play is dependant on retrograde analysis are not eligible?

Reply: [This must refer to the question asked by Germany (not Israel), appearing in circular letter no. 4]. True, a retrograde analysis cannot be taken in consideration as part of the problem's content, not only in the Fairies section but for all sections. This has been the case for any previous WCCT (problems with a central retro element seen as belonging to the distinct Retro genre).


G01 -- 1.b8S#?? illegal 1.Se7? (2.Sc6) Le4! 1.Se3? (2.Sc4 L:c4 3.b8S#) Lc4! 1.Sd2! (2.Sb3/Sc4) 1.- Lc4 2.Sb3 (3.Da5/Sc5#) L:b3 3.b8S# 1.- Lb5 2.Sc4 (3.Da5#) L:c4 3.b8S#

G02 -- 1.Te8? f1S! 1.Td8? c1S! 2.Te8 f1S! 1.Ta8! (2.Ta3#) 1.- b1S 2.Td8! c1S 3.Te8! f1D/f1T/S:d2 (f1S??) 4.Te3+ ~ 5.T:f3# (1.Tc8? c1D/c1T!) (1.Th2? f1D/f1T!)

G03 -- 1.b8T? (2.Td8+ or 3.Sc8+) L:f7! 1.- ed4 2.De7+ Kd5 3.Lb3# 1.Le2! (2.De7+ Kd5 3.D:e5#) 1.- ed4 2.b8L+ Kc5 3.Dc4# 1.- L:f7 2.b8D+ Ke6/Kd5 3.D:e5# 1.- T:g8 2.Sc8+ K:c6 3.b8S#

G04 -- 1.Sg5? g1 2.Sf7 stalemate 1.L:g2? f1 2.L:e4 stalemate 1.Sg1!? gf1 2.c8L fg1 3.La6# 1.- fg1 2.c8S gf1 3.Sb6# No solution in SingleBox. After 1. - g1/f1/gf1/fg1 must be promotion! Cook: 1.c8D/T/L/S

G05 -- 1.Ldb3 (2.L:d5#) 1.- h1L 2.Sd3 (3.f5#) f1T 3.Sf3! T:f3/L:f3 4.L:d5#/f5# (2.- D:c4 3.L:c4# 2.- Le4 3.f5/Ld5+) 1.- d1T 2.Sf3 (3.f5#) b1L 3.Sd3! T:d3/L:d3 4.f5#/L:d5# (2.- D:c4 3.L:c4+ Td5 4.L:d5#) Nowotny with promoted pieces

G06 -- 1.Kh8? c1L! 1.Kh7! (2.g8S/g8L/g8T) 1.- c1S 2.g8S (g8L?/g8T?) Sd3 3.Sf6# (2.- Dd8 3.Td8#) 1.- c1L 2.g8L (g8S?/g8T?) 3.Lf7# 1.- c1T 2.g8T (f8S?/g8L?) Tf1 3.Sg7# 1.- ab5 2.g8D Td6 3.Df7#

G07 -- 1.c6? f6 2.Tf5 fg5 3.b8L# 1.- fe6! 1.e7? f6! 1.Ke5! 1.- fe6 2.Td5 ed5 3.b8T# 1.- f6+ 2.Kf5 fg5 3.b8L# 1.- f5 2.Sg4 fg4 3.b8S# 1.- fg6 2.Dh5 gh5 3.b8D#

G08 -- 1.Db1+? 1.- ab1L!/T! 1.Db8! (2.Dh8#) h1T 2.Db6 (3.Df6#) f1T (2.- Th5/Dh2 3.Df6+ Te5/De5 4.D:e5#) (2.- de1L 3.Df6+ Lc3 4.D:c3#) 3.Db3 (4.Dc3#) de1L (3.- S:c4/Sd5 4.Sc2#) 4.Db1#!

G09 -- 1.Dh7! (2.d8T+ Ld7 3.D/T:d7# (2.- Td8 3.De7#)) 1.- D:e3 2.dc8S+ Kd5/T:c8 3.D:b7#/Dd7# 1.- D:d4 2.dc8S+ Kc6/K:e6/T:c8 3.D:b7#/De7#/Dd7# 1.- cb4 2.De7+ Kc7 3.d8L# 1.- Kc7 2.dc8T+ Kb6 3.D:b7# (2.- K:c8 3.D:b7#/Dd7#) (2.- Kd6 3.Dd7#/De7#) 1.- T:h7 2.d8D+ Td7/Ld7 Db6#/Db8# 1.- Td8 2.dc8T (3.T:d8#/De7#) 2.- Td7/Te8 3.Dd7#

G10 -- 1.f5! zz, 1.- T:b2 2.d8D T:d2+ 3.D:d2# 1.- ba4 2.d8T (3.Th8#) 1.- T:a3 2.d8L (3.Lg5#) 1.- T:a1 2.d8S (3.Sf7#)

G11 -- 1.Th5 1.- T:h5[d8=T] 2.Td5+ T:d5[e8=T] 3.Te5 T:e5[f8=T] 4.Tf5 T:f5[g8=T] 5.Tg5 T:g5[b8=T] 6.Tb8# and analogously in 4x3x2=24 variations, according to the order in which Black promotes Bd8/e8/f8/g8

G12 -- 1.Kf3? (2.Te4#) 1.- f1T+! 1.Kg3? (2.Te4#) 1.- f1S+! 1.Kh3? (2.Te4#) 1.- f1L+! 1.Ta1! (2.Ta5#) 1.- ba1T 2.Kf3 (3.Te4#) 1.- ba1S 2.Kg3 (3.Te4#) 1.- ba1L 2.Kh3 (3.Te4#) 1.- Sd7/Tc2 2.Ta5+ Sc5/Tc5 3.T:c5#

G13 -- 1.Se6! (2.T:f4[c1=S]#) 1.- Tg4 2.Db7+ Kf5 3.Dh7# (3.- K:e6?[d8=S+!] 3.- K:f6?[d8=L+!]) 2.- Sd5 3.D:d5[c1=S]# (3.- K:d5?[d8=D+!]) 1.- c4 2.T:f4[c1=S]+ Kd5 3.Td4# (3.- L:d4?[d8=T+!])

G14 -- 1.d8! (2.D:h8# K:h8?[d8=D+!]) Kg7 2.Dg8+ Kf6 (2.- K:g8?[d8=D+!]) 3.L:g5+ Ke6 (3.- K:g5? [d8=L+!]) 4.Sc5+ Kd5/Kd6 (4.- D:c5?[d8=S+!]) 5.Td4# (5.- K/T/P:d4?[d8=T+!])

G15 -- 1.D:g5! (2.D:f6+ K/S:f6 3.d8D#) 1.- D:d5 2.de8T+ Kd6 3.Lb8# 1.- hg6 2.d8L+ Kf7 3.D:g6# 1.- bc5 2.dc8S+ K:e6 3.D:f5# (1- L:d7 2.T:d7# 1.- fg5 2.d8D#)

G16 -- 1.Dc8? (2.Dc3) d1D/d1S! 1.Da8? (2.Df3#) d1D! 1.De8? (2.De3:#) d1S! 2.Da8/De7 Se5/a5! (2.h8D/S??) 1.Dg7? (2.D:g3+/D:h6+/Ld5) Ke4! 1.Dg8! (2.D:g3+ Ke4 3.D:e3#) 1.- d1S 2.Ld5 (3.D:g3#) 1.- h1S 2.De8 (3.D:e3#) (2.- Se5 3.D:e5#) 1.- Ke4 2.De8+ Kd4/Kf4/Se5 3.D:e3/D:e3/D:e5#

G17 -- 1.Ka3? Sc2+! 1.Kb3? a4+! 1.Kb2? S:d3+! 1.Ka1? Sc2+! 1.Kb1! (2.gf8D#?)(No SingleBox) 1.- fe3 (2.gf8L+? A Kf7!) 2.g8L+! B Kf5 and 3.Le4# 1.- gf3 (2.g8L+? B Kf5!) 2.gf8L+! A Kf7 3.Sd6# 1.- gh3! (2.gf8S+? Kf7!) 2.g8S+! Kf7 3.Sd6# (2.- Kg5 3.De5#? Kh4!!) No solution:1. - gh3!!

G18 -- 1.g7! 1.- a1L 2.Lb2 L:b2 3.gh8L# 1.- a1S 2.Sb3 S:b3 3.gh8S# 1.- a1T 2.Ta2 T:a2 3.gh8T# 1.- a1D 2.Sf2 hg1S 3.gh8D#

G19 -- 1.Lb1! (2.b8T ~ 3.Tb6#) 1.- ab1D 2.b8L ~ 3.Le5# 1.- ba1D 2.b8S ~ 3.Sd7# 1.- T:h4 2.b8D T:f4 3.Dd6# (1.- ba1S 2.b8S)

G20 -- 1.d8! (2.T:f5+ ef5[d8=T] 3.Te8#) 1.- D:d3 2.D:d4+ D:d4[d8=D] 3.D:f6# 1.- S:c5[d8=L] 2.L:f6+ K:d6 3.Db8# 1.- L:g2[d8=S] 2.Sf7+ Kf4 3.Th4#

G21 -- 1.f8! (2.Dd2+ cd2[f8=D] 3.Dc5#) 1.- Ta5 2.D:c3+ K:c3[f8=D] 3.Db4# 1.- T:a2[f8=L] 2.Lc5+ K:d5 3.Db3# 1.- T:a6[f8=S] 2.Se6+ Ke3 3.Sc4# 1.- T:h5[f8=T] 2.Dd1+ Ke3 3.S:g4# 1.- e3 2.Sf3+ gf3[f8=S] 3.Se6# 1.- Ke3 2.Sc4+ K:f4 3.Df2# (2.- Kd4 3.Dd1#) No solution. 1.f8!? must be 1.f8L,T (SingleBox)

G22 -- 1.ef7? bc6! 1.gf7! zz 1.- bc6 2.f8S ~ 3.Sfg6# 1.- ba6 2.f8L a5 3.Lh6# 1.- b6 2.Db5 bc5 3.f8T# 1.- b5 2.Tb4 ba4 3.f8D#

G23 -- 1.Da1! (2.De5/Df6/Dg7 ~ 3.D:g5#/D:g5#/D:h6#) 1.- fg2 2.De5 ~ 3.D:g5# (2.Dg7? g1 3.D:h6[g1=T+!]) (2.Df6? Sf3!) 1.- Le6 2.Df6 ~ 3.D:g5# (2.- S ~ 3.Dh4#) (2.De5? Lf5!; 2.Dg7? Sf7!) 1.- Se6 2.Df6 ~ 3.Dh4# (2.- g5/Sg5 3.D:h6#/D:g5# (2.De5+? g5!; 2.Dg7? S:g7!) 1.- f2 2.Dg7 ~ 3.D:h6# (2.De5? g1! 3.D:g5[g1=S+!]; 2.Df6? Sf3!) Themes: Fleck, antidual.

G24 -- 1.h7! (2.h8T! - 3.Th5+ - 4.T:f5#) (1.Sc8? f6! 2.Dg7 L:c4 3.Dg4 L:d3!) 1.- f5? 2.Sc8 S:c6 3.h8D# 1.- c2 2.L:d4+ cd4 3.h8L+ f6 4.L:f6# 1.- S:c6 2.S:c6+ dc6 3.h8S f5 4.Sf7# Dual: 1. - S:c6 2.Dg5

G25 -- 1.Df4? (2.ed6#) S:e4! 1.- Dc8/Dd8 2.ed6+ Ke8 3.T:c8#/T:d8# 1.- Ta6 2.Te8+ D:e8 3.de8T# 1.- T:d4 2.d8L+ D:d8 3.cd8L# 1.- L:f4 2.d8D+ D:d8 3.cd8D# 1.- de5 2.Lc5+ Td6 3.L:d6# (1.- D:f6 2.D:f6#) 1.D:h2? (2.ed6#) c1L+! Changed variations: 1.- D:f6 2.Te8+ T:e8 3.de8T# 1.- S:e4 2.c8S+ Ke8 3.D:h8# (2.- D:c8 3.dc8S#) (1.- D:h2 2.d8D#) 1.- T:d4/Ta6 are not real defences: 2.ed6+ T:d6 3.D:d6# After 1.- Dc8/Dd8 2.ed6+ Ke8, Dh8# mates as well. 1.D:h8? (2.Dd8/De8/Df8#) c1D+! 1.Dg3! (2.ed6#) 1.- Dc8/Dd8 2.ed6+ Ke8 3.T:c8#/T:d8# 1.- D:f6 2.Te8+ T:e8 3.de8T# 1.- Ta6 2.Te8+ D:e8 3.de8T# 1.- T:d4 2.d8L+ D:d8 3.cd8L# 1.- L:g3 2.d8D+ D:d8 3.cd8D# 1.- S:e4 2.c8S+ Ke8 3.Dg8# (2.- D:c8 3.dc8S#) 1.- de5 2.Lc5+ Td6 3.Ld6:#

G26 -- 1.d8? T:a4[d8=L]! 1.c8! zz 1.- T:c4[c8=D] 2.Dg8 ~ 3.Dh7# (2.- D:d5+ 3.D:d5#) 1.- T:b5[c8=T] 2.Te8 ~ 3.T:e5# 1.- T:a4[c8=L] 2.d8 ~ 3.Lf5# 1.- T:b3[c8=S] 2.Ke6 ~ 3.Sd6# 1.- D:c4[c8=D] 2.Dg8 ~ 3.Dh7# (2.- D:d5+ 3.D:d5#)

G27 -- 1.Dh4! (2.D:e4+ K:e4[g8=D] 3.Dg2#) 1.- D:b1[g8=L) 2.K:d7 (3.L:e6#) Lf5 3.Dd4# 1.- D:a2[g8=T] 2.Td8 (3.Td:d7#) d6 3.T:d6# 1.- D:b2[g8=S] 2.K:d7 (3.Se7#)

G28 -- 1.Lf6! (2.T:f4[c1=T] (3.Th4#) Tc4 3.Sg3#) 1.- Td3 2.T:f4[d1=T] (3.Th4#) Td4 3.Sg3# 1.- Te3 2.T:f4[e1=T] (3.Th4#) Te4 3.Sg3# 1.- Tcf3 2.T:f4[f1=T] (3.Th4#) T:f4 3.Sg3# 1.- T:e4 2.T:e4[c1=T] (3.Th4#) Tc4 3.Sg3# 1.- Tg4 2.T:g4[c1=T] (3.Th4#) Tc4 3.Sg3#

G29 -- Thematic tries: 1.T:g5+?[e1=L] D:g5[c8=T] (2.Sb4+? L:b4:!) 2.L:b3+[e1=T??] T:b3 [c8=L??] 1.L:b3+?[e1=T] T:b3[c8=L] (2.Le6+? T:e6!) 2.T:g5+[e1=L??] D:g5[c8=T??] Key: 1.T2h4! (2.T:g4 3.T:d4#[e1=S]) 1.- Dh8? 2.T:g5+[e1=L] De5+ 3.T:e5# Correction: 1.- Df8!? 2.T:g5+ A[e1=L] Df5+ 3.L:b3+ B[e1=T??] T:b3[c8=L] 4.Le6# pin mate 1.- Te2? 2.L:b3#[e1=T] Correction: 1.- Tc2!? 2.L:b3+ B[e1=T] Tc4 3.T:g5+ A[e1=L??] D:g5[c8=T] 4.Sb4# pin mate (3.- Te5 4.T:e5#) (1.- Lb7 2.L:b3+[e1=T] T:b3[c8=L] 3.L:b7# 1.- Sc3 2.T:g5+[e1=L] D:g5[h8=T] 3.Sb4/Tc5 Reciprocal change

G30 -- 1.Lc4! (2.T:d1+[e1=S] Sd3 3.T:d3#) 1.- Sc3 2.D:b4+[e1=D] c5 3.D:c5# 1.- Se3 2.Se8+ T:e8 3.de8S[e1=T] 1.- Sf2 2.L:g3+[e1=L] T:g3 3.Se8# 1.- S:b5 2.S:b5+[e1=S] cb5 3.D:b4# Try 1.L:b3? (2.Td1+...) 1.- c5! Black AUW, 3 x anticipatory interference

G31 -- 1.c8? A (2.S:b5+ C Kc6 3.De6# D) 1.- D:b2[c8=T] 2.De6+ D T:e6 3.d8D# B 1.- Sc7 2.T:b6+ Lc6/Kc5 3.Sb5#/Sb3# 1.- Se7 2.S:b5+ K:d7 3.De8# 1.- D:a2[c8=T]! 1.d8! B ( 2.De6+ D Kc5 3.S:b5# C) 1.- D:b1[d8=S] 2.S:b5+ C ab5 3.c8S# A 1.- S:d4[d8=S] 2.L:e5+ K:e5/Kc5 3.Lg3#/Lf:d4# 1.- Kc5 2.S:b5+ Kc6 3.Dd7#

G32 -- 1.Da4+? Kb7! 1.Da8+? Tb7! 1.T:c5[d1=D][f1=D]?? - self-check 1.Kf2! ~ 2.T:c5+[d1=D] K:c5 [d8T or e8=T] 3.Dc4# 1.- T:g4[d8=L] 2.Da8+ Kd7 3.Lf5# (3.- Lf5[e8=L]?? - s.f.) (2.- Kb5 3.Da4#) (3.- Ka4[e8=D]?? - s.f) 1.- S:e3[e8=S] 2.Da4+ Kb7 3.Sfd6# (3.- Dd6[d8=S]?? - s.f.) (2.- Kd5 3.Td4#) (3.- D/Kd4[d8=T]?? - s.f.) 1.- S:a6[d8=D] 2.D:d5+[f1=S] Kb5 3.D:c5[d1=D]# (3.- S/L:c5[e8=D]?? - s.f.) (2.- K:c7 3.Dd7#) 1.- D:c4[e8=T] 2.Te6+ K:c7/Kd7 3.Dc8# (3.- Tc8[d8=D]?? - s .f.) (2.- Kc5 3.Dc4[d1=D]# 1.- D:c4[d8=T] 2.Se5+ K:c7 3.Td7# (2.- Kc5 3.D:c4[d1=D]#) 1.- K:c7 2.T:c5+[e1=D] L:c5[e8=T] 3.Db6# (3.- K:b6[d8=D]??- s.f.) (2.- L:c5[d8=T] 3.Td7#) (2.- Sc6 3.Sd5[f1=S]#)

G33 -- 1.f8! (2.T:c6+[g1=L] K:c6[f8=T] 3.Tf6#) 1.- T:f4 2.D:f4[g1=T] (3.Dc7#) 2.- L:f4[f8=D] 3.Dc5# (2.S:f4[g1=T]? T:g5!), 1.- L:f4 2.S:f4[g1=L]! (3.Sd5#) 2.- T:f4[f8=S] 3.Sd7#, 2.- Se3 3.T:b4# (2.D:f4[g1=L]? Lh2!). Dual avoidance; distributed AUW; legal position!

G34 -- 1.e8? (2.Lc4+ A bc4[e8=L] 3.Le6#) 1.- Dd4 2.Sf6+ B D:f6[e8=S] 3.Tc5# (2. - L:f6 [e8=S] 3.Sc7#) 1.- Dh6 2.Te5+ C L:e5[e8=T] 3.T:e5# 1.- Tc2! 1.b8! (2.Sf6+ B L:f6[b8=S] 3.Le6#) 1.- Dd4 2.Te5+ C D:e5[b8=T] 3.T:b5# 1.- Dh6 2.Lc4+ A bc4[b8=L] 3.Tc5# Threat Lacny (Shedey).

G35 -- 1.Dc5+? S:c5! 1.Db4? Sc5! 1.D:b3? Da2! 1.D:b2? Sd4! 1.Da2! 1.- D:a2[a8=D] 2.Dc8! Sd4 3.Dg4# 1.- ba6[a8=L] 2.L:e4 Sd4 3.Dg8# 1.- D:c1[a8=S] 2.Sc7! Sd4 3.Dg8# 1.- ba5[a8=T] 2.Kc7 - 3.Tg8#

G36 -- 1.b5? D:a3! 2.d8D? 1.c5? D:b3! 2.d8T? 1.Se~ D:b2! 2.d8L! 1.Lc2? D:b1! 2.d8S? 1.Sd2? Db1! 1.D:a4? Da3! 1.D:a2? a3! 1.Te8! zz 1.- D:a3 2.d8D ~ 3.Df6/T:g8# 1.- D:b3/ab3 2.d8T ~ 3.T:g8# 1.- D:b2/ /L:b2 2.d8L ~3.Lf6# 1.- D:b1 2.d8S ~ 3.Sf7#

G37 -- 1.Td8! (2.L:b7+ K:b7 3.a6#) h1 2.gh4[h1=L] g1 3.hg5[g1=S] f1 4.gh6[f1=L] d1 5.hg7[d1=S] 6.L:b7+ K:b7 7.a6#

G38 -- 1.Te2? (2.Le6+ A fe6[g8=L] 3.L:e6#) 1. - Db3! 1.- Se4 2.Se3+ B de3[g8=S] 3.Se7# 1.- Sf4 2.Tg5+ C fg5[g8=T] 3.T:g5# 1.- Db3! (1.- Da2 2.D:d3+) 1.Ld2! (2.Tg5+ C fg5[g8=T] 3.T:g5#) 1.- Se4 2.Le6+ A fe6[g8=L] 3.Le6# 1.- Sf4 2.Se3+ B de3[g8=S] 3.Sh6# (1.- Se5 2.T:e5+ fe5[g8=T] 3.Df3#) (1.Dc3? (2.Se3+ B de3[g8=S] 3.D:f6#)) 1.- D:d1[g8=S]! Threat Lacny.

G39 -- 1.Dg4! (2.Df4! ~ 3.D:e5#) 2.- dc4/S:e1[e8=S] 3.Sc7# 1.- Lf4 2.Se3! ~ 3.D:f5# (2.- L:e3/ T:e3/ S:e1[e8=S] 3.Sc7#) 1.- Sdf4 2.Sd3! ~ 3.S:c5# (2.- dc4/S:d3[e8=S] 3.Sc7#) 1.- Shf4 2.Lh3! ~ 3.D:f5 (2.- S:h3[e8=L] 3.Ld7# 2.- dc4/S:e1[e8=S] 3.Sc7#) 1.- Tf4 2.Te4! ~ 3.T:e5# (2.- dc4/S:e1[e8=S] 3.Sc7#) (2.- T:f1[e8=L] 3.Ld7#) 1.- Df4 2.Dg5! ~ 3.D:f6# (1.Sg2? ~ 2.Sf4+ 1.- f4!)

G40 -- 1.Df3! (2.Sg5+ K:d6 3.Sf7# **)) 1.- Df7 2.S:f6+ K:d6 3.Se8# **) 1.- Tf7 2.Sc5+ K:d6 3.Sb7# **) 1.- Sc5 2.Sc3+**) K:d6 3.Sb5# **) 1.- Tg5 2.Sg3+ K:d6 3.Sf5# **) 1.- L:d6 2.S:f6+ Ke5 3.Sg4# **) 2.S:d2? K:d6? 3.Sc4# 2.-Se4! **)wPc8 guards wS; Siers-Rossel

G41 -- Thematical try: 1.Lg1+? Dd4! 2.L*d4??[a1/b1=D+] (not 1.- T:g1? 2.Sa6+ Kd5 3.L:f7#) 1.Se4+! Kc4 2.L:f7+ Te6 3.L*e6+[b1=T] de6 4.Sd2+ Kc5 5.Sa6+ Kd5 6.Th5+ 6.- Le/Lhg5 7.T*g5+[a1=L] L:g5 8.Sc7+ Kc5 9.Lg1+ Dd4 10.L:d4# (7.- e5/De5 8.Sc7+ Kc5 9.Lg1#) (6.- e5/De5 7.Sc7+ Kc5 8.Lg1#) Notes:These are thematical tries etc. The lines are only given to illustrate why certain moves are good or bad. In these lines, there may be other refutations, to. 1.Lg1+? Dd4! 2.Se4+ Kc4 and if 3./4./5. Sd2+ then D:d2; 2.Sa6+ Kd5 3.Th5+ Ke6 4.Sc7+ Kf6 etc. (5.L*d4??); 3.L:f7+ Te6 5.Th5+ Le/Lhg5 6.T*g5+[a1=L] L:g5 7.Sc7+ Kc5 8.L*e6[b1=T] threat 9.L:d4/Sa6#) Tb2+/T:b5/d5! 1.Th5+? Lex

G42 -- 1.- S4e5 2.Se3+ Kf6 3.Lg5# 1.- S:d6[c8=T] 2.Tf8+ Sf7 3.T:f7[d1=S]# 1.Lg5? Lf2! 1.Le3! (2.Sd4+ S:d4[c8=S] 3.Se7#) 1.- T:b1[c8=D] 2.Df8+ D:f8[g8=D] 3.D:f8[d1=D]# (2.Sd4+? S:d4[g8=S] 3.Se7#, but 2.- T:d4!) 1.- D:a7[c8=T] 2.Tf8+ T:f8[g8=T] 3.T:f8[d1=T]# (2.Sd4+? S:d4[g8=S] 3.Se7#, but 2.- D:d4!) 1.- S:e3[c8=L] 2.L:e6+ L:e6[g8=L] 3.L:e6[d1=L]# 1.- fe2[c8=S] 2.Se7+ S:e7[g8=S] 3.S:e7[d1=S]#

G43 -- 1.Kg3? (2.Th4#) D/T:d4! 1.L:c4! (2.Le2#) 1.- Da6 2.Kg3 (2.g3? D:a2+!) 2.- T:d4 3.D:g6+[h1=T] A (3.T:g5??) 3.- L:g6[h8=D] 4.T:g5 B 1.- Db5 2.g3 (2.Kg3? D:e5+!) 2.- T:d4 3.T:g5+[h1=S] B (3.D:g6??) 3.- L:g5[h8=T] 4.D:g6# A halfpin, dual avoidance on g3, AB - BA

G44 -- 1.g8! (2.Dg4+ hg4[e8=D] 3.Lf5# A 2.- hg4[g8=D] 3.Tg6# B 2.- Df5/Sf5 3.D:f5#) 1.- Tb1 2.Lf5+ A S:f5[e8=L] 3.L:d7# 2.- S:f5[g8=L] 3.Tg6# 2.- D:f5[e8=L] 3.L:d7# 1.- d4 2.Tg6+ B D:g6[g8=T] 3.T:g6# 2.- D:g6[e8=T] 3.Db3# 2.- S:g6[g8=T] 3.Db3# 2.- Df6 3.T:f6# (1.- de4[e8/g8=L] 2.L:f7 S:f7[g8/e8=L] 3.Lf7# 1.- L:e5 2.T:e5+ Kf6 3.Sg4# 1.- Df5 2.L:f5+ S:f5[e8=L] 3.Tg6# 1.- Sf5 2.Tg6+ D:g6[g8=T]/Df6 3.T:g6#/T:f6#

G45 -- 1.- Da3: 2.T:d4 Ke5 3.e8T# (2.- T:d4 3.D:d4#) 1.- T:f2 2.Sc7 Kd6 3.e8S# (2.- K:e4 3.e8T#) 1.- D:c1 2.Le6+ K:c6 3.e8L# (1.- D:b2 2.Le6+ K:c6 3.e8D#) 1.f8! (2.Dd4[f8=D] D(T)d4: 3.Df7# 1.- D:a3[f8=T] 2.Le6+ K:c6 3.Tc8# 1.- T:f2[f8=S] 2.T:d4+ Ke5 3.Sh6# 1.- D:c1[f8=L] 2.Sc7+ Kd6 3.e8S# (3.- K:c7? [e8=S!] 1.- f5 2.Te5 K:e5[f8=T] 3.Tf5# Lacny, all changed mates, 13 promotions 1.e8? T:f2:![e8=S] 2.Sc7 Ke4! 3.e8T? 1.Te6? Lf4! 1.Dc2? Tg5! 2.Te6 d3! Legal position

G46 -- 1.Lg3? (2.Df2! zz 2.- L:e2[d8=S] 3.Sc6# 2.- S:f2[d8=D] 3.D:b6# 2.- S:g3[d8=L] 3.L:b6# 1.- Sf2! And other variations (1.- f2 2.d5/D:f1) 1.Sg3 (2.De2! zz 2.- L:e2[d8=D] 3.D:b6# 2.- S:f2[d8=L] 3.L:b6# 2.- S:g3[d8=S] 3.Sc6# and other variations 1.- Le2 2.Df1! zz etc. Theme Lacny

G47 -- 1.f8? (2.D:e3+ T:e3[f8=D] 3.Dd6#) Dg8! 1.- Sc3 2.Lf6+ A S:f6[f8=L] 3.Lf8-c5# 1.- ef2 2.Sf5+ B gf5[f8=S] 3.Sf8-e6# 1.- T:b3[f8=L] 2.Ta4+ Tb4 3.fe3# 1.- D:h6[f8=S] 2.Sf8-e6+ K:e4 3.f3# 1.b8! (2.D:e3+ T:e3[b8=D] 3.Db8-d6#) 1.- Sc3 2.Sf5+ B gf5[b8=S] 3.Sb8-c6# 1.- ef2 2.Lf6+ A S:f6[b8=L] 3.Lb8-e5# 1.- T:b3[b8=L] 2.Lb8-e5+ K:e4 3.f3# 1.- D:h6[b8=S] 2.Sb8-c6+ T:c6 3.Td5#

G48 -- 1.f8! (2.fe4+ K:e4/Ke6 3.Df3#/Df7# (3.- K:f3?/K:e7?) 1.- Tf5 2.T:f5+ Ke6 3.Sc5# (3.- T:c5? /K:f5?) 1.- Db1 2.T:d4+ Ke6 3.Sg7# (3.- L:g7?) 1.- Ke6 2.S:c7+ Kd6/Kf5 (2.- T:c7?/K:d7?) 3.Le7# /T:g5# (3.- K:e7? /K:d7?/L:g5?) ( 1.- ef3 2.D:f3+ Ke6 3.Df7# 1.- L:f8 2.T:g5+ Ke6 3.S:f8#)

G49 -- 1.Df1! ~ /e4/Lf7 2.Td7+ Kc5/Ke5/K:e6 3.Td5/Td5/L:f7# 1.- T:d8 2.Tc6+! A S:c6[f8=T] 3.Se4# B (2.- S:c6[e8=T] 3.Lb4# C) 1.- L:e8 2.Se4+! B fe4[d8=S] 3.Lb4# C (2.- fe4[f8=S] 3.Tc6# A) 1.- S:f8 2.Lb4+! C D:b4[e8=L] 3.Tc6# A (2.- D:b4[d8=L] 3.Se4# B) (1.- S:b5 2.Lb4+! D:b4[e8=L] 3.Tc6# 2.- D:b4[d8=L] 3.Tb6# 1.- Dc3 2.c5+ D:c5 3.Td7# 2.- Kd5 3.S:c3#)

G50 -- Thematic Try 1.Kc3? zz g4! Threat tries: 2.Ta5? e1! 2.Ta6? b1! 1.- b1 2.Taa5! (2.- e1) 3.T:d5[b1=L!]# 1.- e1 2.Ta6! (2.- b1) 3.L:d6[e1=S!]# 1.- S~ 2.S:d7# 1.Kd3! zz. (Threat tries: 2.Ta5? b1! 2.Ta6? e1!) 1.- e1 2.Ta5! (2.- b1) 3.T:d5[e1=L!]# 1.- b1 2.Ta6! (2.- e1) 3.L:d6[b1=S!]# 1.- g4 2.fg4~ 3.Sf3# 1.- S~ 2.S:d7# Themes: Reciprocal changes, Hannelius

G51 -- 1.fg8S? g1T+! 1.fe8S? e1L+! 1.Tc3! (2.e4+ Kd4 3.Sf3#) 1.- g1S 2.fg8S (3.Sf6#/Se7#) 2.- Sh7 3.Se7# 1.- e1S 2.fe8S (3.Sf6#/Sc7#) 2.- Sh7 3.Sc7#

G52 -- 1.Dd3! (2.Dd4#) 1.- D:g2/T:g2/Se:g2/Sh:g2/L:g2/hg2[e8=S?] 2.Dd:d6# 1.- D:g2/T:g2/Se:g2/Sh:g2/ L:g2/hg2[b8=S]/Dg1/Sc2/Sef3/Shf3/Lb6 2.Dd:d6+ K:d6[e8=D] 3.De:e6# 2.- Kf6 3.Dd:e6# 1.- Se:d3/ L:d3/ed3[e8=D?] 2.De:e6# 1.- Se:d3/L:d3/[b8=D] 2.Db:d6+ K:d6[e8=D] 3.De:e6# (2.- Kf6 3.Dd:e6#) 1.- ed3[b8=D] 2.Db:d6+ K:d6[e8=D] 3.De:e6# (2.- Kf6 3.Dd:e6# 2.- Ke4 3.Ddd5#) 1.- Kf6 2.Ddd4+ e5 3.Dd:d6# (2.- Kg6 3.Ddg7#) 1.- f4 2.Dd:d6+ Kf5 3.Dd:e6 (2.- K:d6[e8D] 3.De:e6 2.- Kf6 3.Dd:e6#) 1.- d5 2.Dd:d5 + Kf6 3.Dd:e6#

G53 -- 1.Lb7+! Kb8 2.Ld5+ Kc8 3.Tc4+ Kb8 4.Tb2+ 4.- cb2[g8=T]! 5.Tb4+ Kc8 6.Dc1+ 6.- bc1 [h8=D] 7.Lb7+! Kb8 8.Lc6+! Kc8 9.Tb8+ K:b8[f8=T] 10.T:e8+[c1=T] S:e8 11.T:e8[f1=S]# (not 7.Tb8+? K:b8[f8=T] 8.T:e8+[c1=T] Tc8! 9.T:c8??[f1=T]) 6.- bc1[f8=D]? 7.D:e8+[c1=T] S:e8[h8=D] 8.T:e8 [f1=S]# 4.- cb2[h8=T]? 5.Tb4+ Kc8 6.Dc1+ 6.- bc1[g8=D] 7.Lb7+! Kb8 8.L:e4+! Kc8 9.Dc4# 6.- bc1 [f8=D]? 7.D:e8+[c1=T] S:e8[g8=D] 8.D:e8[f1=S]# 4.- cb2[f8=]? 5.Tb4+ Kc8 6.Dc1+ 6.- bc1[h8=D] 7.T:e8+[c1=T] S:e8[g8=T] 8.T:e8[f1=S]# 6.- bc1[g8=D] 7.T:e8+[c1=T] S:e8[h8=T] 8.D:e8[f1=S]# Opening and closing the c-fil (and the b-file, too); white sacrifices in order to activate the dummy pawns f8,g8 and h8; switchbacks of the white bishop; choices by black how to order the rebirths.

G54 -- 1.- S:b3 2.h8T! A ~ 3.Te8# 1.- S:e2 2.ef7! C ~ 3.f8L# 1.- Sd3 2.c8! B ~ 3.Sb:c6# (2.- K:d8[c8=S] 3.D:b6# 2.- fe6 3.Sd:c6#) 1.Ld3 ?! (2.T:f6! ~ 3.T:f7#) 1.- Db2! 2.T:f6 Df2! 1.- S:b3 2.h8T! A ~ 3.Te8# 1.- Se2 2.c8! B ~ 3.Sb:c6 (2.- K:d8[c8=S] 3.D:b6# 2.- fe6 3.Sd:c6#) 1.- S:d3 2.ef7! C ~ 3.f8L# 1.Td3! (2.T:f6! ~ 3.T:f7#) 1.- Sb3 2.c8! B ~ 3.Sb:c6# (2.- K:d8[c8=S] 3.D:b6# 2.- fe6 3.Sd:c6#) 1.- S:e2 2.ef7! C ~ 3.f8L# 1.- S:d3 2.h8T! A ~ 3.Te8# G55 -- 1.Db4! (2.Kc5 ~ 3.D:d4#) 1.- a1T 2.Tg3! ~ [e1=T??] 3.Te3# 1.- a1L 2.Tg4! ~ [e1=L??] 3.Sg3# 1.- a1S 2.Tg5! ~ [e1=S??] 3.Lg2#

G56 -- 1.c8? (2.Tg5+ A hg5/L:g5[c8=T] 3.Sb4#) 1.- Sc6 2.L:c4+ B bc4[c8=L] 3.L:c6# 1.- Le7 2.Sc3+ C dc3[c8=S] 3.S:e7# 1.- T:b1[c8=S] 2.Td6+ Ke5 3.f4# 1.- S:b3[c8=L] 2.Lb7+ Tc6 3.D:b3# (1.- Le5 2.Sc3+ dc3[c8=S] 3.Se7# 1.- de3! 1.f8! (2.L:c4+ B S:c4/bc4[f8=L] 3.Sb4#) 1.- Sc6 2.Sc3+ C dc3[f8=S] 3.Lc6# 1.- Le7 2.Tg5+ A hg5/L:g5[f8=T] 3.Tf5# 1.- T:b1[f8=S] 2.Lc6+ S:c6 3.Td7# 1.- Sb3[f8=L] 2.Td6+ Ke5 3.f4# (1.- de3 2.Dd2+ ed2[f8=D] 3.Dd6# 1.- L:g7[f8=T] 2.Tf5+ Le5 3.T:e5#)

G57 -- 1.d8? (2.D:g2+ T:g2[c8=D] 3.D:c2#) Ta5! 1.- ab3 a [d8=S] 2.Lf3:+ A Kf5/K:f3 3.Tg5/Sg5# 1.- L:f8 b [d8=L] 2.f3+ B Ke3 3.Lg5# 1.- L:g8 c [d8=T] 2.Sg5+ C K:e5 3.Lg7# (1.- d4 2.Td4:+ S:d4[d8=T] 3.Td4# 1.- Ld6 2.Sg5+ K:e5 3.Lg7#) 1.c8! - 2.Dg2:+ T:g2[c8=D] 3.D:c2# 1.- ab3 a [c8=S] 2.Sg5:+ C K:e5 3.Lg7# 1.- L:f8 b [c8=L] 2.Lf3+ A Kf5,K:f3 3.d8/Sg5# 1.- L:g8 c [c8=T] 2.f3+ B Ke3 3.Tc3# 1.- d4 2.D:g2+ T:g2[c8=D] 3.Dc6#, 1.- Ld6 2.Sg5+ Ke5: 3.Lg7# Lacny theme; legal position

G58 -- 1.D:d6#?[b1=D] 1.Dc7?/De8? - 2.D:e7# 1.- d4! 1.Lb6! - 2.D:d5+ K:d5[c8=D] 3.Dc4# (3.- K:c4? [g8=D] 2.- Kd7 3.Sf6# 1.- Tf7! 2.Sf6+ K:f6[c8=S] 3.S:e4# (3.- de4? [g8=S] 3.- K:g7?[g8=T] 1.- L:g8! 2.T:g6+[b1=S] Kf7 3.De8# (3.- K:e8? [c8=D]) 2.- Tf6 3.Sh6# 1.- hg3![g8=S] 2.S4h6 - (Tf3) 3.L:f5#[b1=T] (3.- T:f5? [g8=L/c8=L] 2.- L:g8![c8=S] 3.T:g6#[b1=S] 1.- T:g3![g8=S] 2.Dd7+ D:d7[c8=D] 3.L:a7#[b1=S] Thematic mates + pin-mates, thematic black strategy; legal position

G59 -- 1.Dg1! (2.Te3+ fe3[b8,e8=T] 3.D:e3#) 1.- hg1[b8=D] 2.T:e2+! S:e2[e8=T] 3.T:e6[g1=D]# Try: 2.D:d6+[g1=T]? L:d6[e8=D] 3.f7+ T:g7! 1.- hg1[e8=D] 2.f7+ L:g7[b8=L] 3.L:d6[g1=T]# Try: 2.D:e6+ [g1=D]? S:e6[b8=D] 3.T:e2+ De3!

G60 -- 1.Th5! (2.D:c4+[e1=D] bc4[c8=D] 3.D:d7#) 1.- Sd2 2.T:f5+[e1=L] S:f5[c8=T] 3.Sb6+ cb6 4.Sc3# pinmate (2.Sb6+? cb6[c8=S] 3.T:f5+[e1=L] S:f5[c8=T??]) 1.- Se3 2.Lc3 (3.Te5#) 2.- d6 3.L:f3+[e1=T] T:f3[c8=L] 4.Le6# pinmate (2.L:f3+[e1=T]? T:f3[c8=L] 4.Lc3 Se~!) 1.- d6 2.D:c4+[e1=D] bc4[c8=D] 3.Sb6+ (3.De6+? D:D!) cb6 4.Dc6# (4.Sc3+ D:c3!) 1.- S:h1[c8=L] 2.L:d7! Lf6 3.L:f6![e1=L] ba4 4.D:c4# Anticipatory interferences to the "reborn black T,L and line openings to the "reborn" white T,L,D with dual avoidance play.

G61 -- 1.h8! (2.L:d6+ S:d6[h8=L] 3.L:g7#) 1.- Sb4/Sc5 2.Sd3+ S:d3[h8=S] 3.S:f7[c1=S]# 1.- Lh6/Lg5/Lc5 2.T:e3+ L:e3[h8=T] 3.Te8# bPc1 guards bBe3 and bSd3 in a circe-like manner

G62 -- 1.f8! (2.Sf7+ S:f7[f8=S] 3.T:e6[a1=L]#) 1.- cb4[f8=D] 2.e8+ L:f8[e8=D] 3.D:f8# 1.- D:h2[f8=L] 2.Sf7+ S:f7 3.e8S# 1.- Sf7 2.L:g3+[a1=D] and 3.S:f7# 1.- L:f8 2.Sf7+ S:f7 3.e8S#

G63 -- 1.S:f7+? K:f7! 1.Se6+? K:f6! 1.Dc6! (2.Sd5+ K:h5/f6 3.S:f4#) (1.- c1D,T?) 1.- Tb6 2.d8! (3. S:f7# A) 2.- D:e2[d8=L] x 3.Se6# B 2. - S:f3/T:c6[d8=D] 3.S:f3/Se6#) 1.- Te8 2.de8! (3.Se6# B) 2.- D:e2[e8=L] x 3.S:f7# A (2.- S:f3 3.S:f3#); furthermore: 1.- Sg2 2.Kh2! (3.Sh3#) 1.- Da3/Dc3/Dc4 2.e5! (3.Sg~/De4#) (2.- Kf5 3.De4#) 1.- D:e4? 2.Sg:e4# Le Grand; legal position!

G64 -- 1.b8! (2.Le5+ L:e5[b8=L] 3.L:e5#) 1.- Dh2 2.Dh4+ D:h4[b8=D] 3.D:b4# 1.- T:f5 2.Tf4+ T:f4 [b8=T] 3.T:b4# 1.- Sf7 2.S:f3+ S:f3[b8=S] 3.S:c6# 1.- ef2[b8=T] 2.T:b4+ Ke3 3.Sg2# 1.- T:d7[b8=S] 2.D:f6+ K:c5 3.Sa6#

G65 -- 1.e8? (2.D:e6# A) 1.- e1! B; 1.f8? (2.T:f6 B) 1.- a1! a. 1.Tg6! (2.T:f4+ gf4 3.L:g4#) 1.- a1 a 2.e8! (3.D:e6[a1=T]# A) 2.- gh1[e8=S] x 3.T:f6[h1=L] B), 1.- e1 b 2.f8! (3.T:f6[e1=L]# B) 2.- gh1[f8=S] X 3.D:e6[h1=T]# A, 2.- Lf~ 3.D:e6[e1=T]# (3.- T:e6[f8=D]??) Hannelius, Le Grand, Beugung; legal position

G66 -- 1.Sg3? (2.Se4#/Sh5#) h1D! 1.a6?,Kb5? tempo a1=D! (1.b5?,Kd5?,Da3/b2/c2/d1? a1=D!) 1.d8T? (2.Td7 ~ 3.Tf7#/Lg7#) ab1D,L,S! 1.c8=T! tempo 1.- a1D 2.Sg3 (3.Se4#/3.Sh5#) D:c3+ 3.D:c3# 1.- a1T 2.Da2 T:b1/T:a2 3.d8L#/d8D# 1.- a1L 2.Db2 L:b2 3.d8D# (1.- ab1 ~ 2.d8=L#)

G67 -- 1.Lb6! (2.T:e2+ f:e2 3.f3#) (not 2.a8? g1! or 2.e8? c1!) 1.- c1 2.a8! & 3.L:d5[c1=T]# (2.T:e2[c1=S]+??) (3.- K:d5[a8=L]??) 1.- g1 2.e8! & 3.T:e5[g1=L]# (2.T:e2[c1=S]+??) (3.- K:e5[e8=T]??) Banny, Fairy mates

G68 -- 1.- Td4 2.Se3# 1.- Ld4 2.Sd2# 1.Sc3! (2.Ld3+ T:d3[c8=L] 3.La6#) 1.- Td4 2.Se3+ K:c3[c8=S] 3.S:d1+ Kc4 4.S:b6[g1=L]# (4.- L:b6??) 1.- Ld4 2.Sd2+ K:c3[c8=S] 3.Sb1+ Kc4 4.S:d6[d1=T]# (4.- T:d6??) Grimshaw on d4 in setplay, 2x Grimshaw on d4 solution