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2011 & 2012 Tourney: T71-80

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Last updated: 09.10.2013
# Problem Solution
T80 Dan Meinking
USA
T80 ChessProblems.ca (v), 21.02.2012
dedicated to Nicolas Dupont
bq6/3K4/4R3/8/8/8/p5N1/k5r1
aser-s# 25 (3+5) C?



Solution: 

1.Rg6!! 5.Kh3 6.Sf4! 7.Kh2 8.Kh1** Rg2 9.Sd3! 10.Kh2** Rg3 11.Kg2** Rf3 12.Kg3** Rf4 13.Kf3** Re4 14.Kf4** Re5 15.Ke4** Rd5 16.Ke5** Rd6 17.Kd5** Rc6 18.Kd6** Rc7 19.Kc6**! Rb7 24.Kh1 25.Rg1+ Rb1 #

  • Systematic "collapsing" of eleven bR double-check batteries! White must force the Rook to climb the full "staircase", all the way to b7, from where it closes the Queen's guard of b1 (and the Bishop's guard of h1). The key-move looks a bit 'mysterious': the wR immediately unblocks e6, but doesn't move again till the very end. The wS serves to control auto-checks during the introduction, closing the g1-g4 and b8-h2 lines and opening the a8-h1 and b8-h2 lines in a precise manner.
  • aser-s#25 means "anti-parry-series self-mate in 25": white plays the series and is permitted to auto-check; when anti-parrying, black will resist white's plan; white's 25th move forces black to deliver checkmate.
  • Anti-Parry Series (APS) is a new fairy condition invented by Nicolas Dupont. The official definition and other details can be seen here (document revised 13-Mar-2012).
  • Version 04.03.2012.
T79 Dan Meinking
USA
T79 ChessProblems.ca, 13.02.2012
dedicated to George P. Sphicas 6bq/7p/6kb/8/1K6/n7/N7/8
aser-# 19 (2+6) C?


Solution: 

1.Ka4!! 4.Sd8! 5.Kb3* Sc4 6.Kc2 7.Kd2** Se3 8.Kd3 9.Kc4** Sd5 10.Kd3 11.Ke3** Sf4 12.Ke4 13.Kd5** Se6 14.Ke4! (Ke5*? Sg7!) 15.Kf4** Sg5 16.Ke5*! Kg7 17.Ke6** Sf7 18.Kf5 19.Se6 # (ideal)

  • Systematic "collapsing" of six bS double-check batteries, with lots of strategy throughout! White's first task is to force bS=>c4, but 1.Kb3*? allows 1...Kf7! and too much time is lost. The move 4.Sd8! guards f7 (to prevent ...Kf7) and eyes e6 (the mate-delivery square). White must avoid Kc3*?/Kd4*? always because black can reply ...Kf6! Even 14.Ke5*? Sg7! is too soon. Only 16.Ke5! can force ...Kg7.
  • aser-#19 means "anti-parry-series direct-mate in 19": white plays the series and is permitted to auto-check; when anti-parrying, black will resist white's plan; white forces mate on his 19th move.
  • Anti-Parry Series (APS) is a new fairy condition invented by Nicolas Dupont. The official definition and other details can be seen here (document revised 21-Feb-2012).
T78 Harald Grubert
Germany
T78 ChessProblems.ca, 11.02.2012

ser-h# 8* (9+2) C+
Nightrider a4, a5, b4, b6
2 variants


Solutions: 

1...Nb6-f4 #

1.a7*b6 2.b6-b5 3.b5*a4 4.Kh8-g7 5.Kg7-f7 6.Kf7-e6 7.Ke6-d6 8.Kd6-c5 Na5-b7 #

1.a7*b6 2.b6-b5 3.b5*c4 4.c4*d3 5.d3*e2 6.e2-e1=B 7.Be1*c3 8.Bc3-g7 Na4-e2 #
T77 Alberto Armeni
Italy
T77 ChessProblems.ca, 10.02.2012
8/5p1b/5b1n/8/4k3/8/2K3pr/8
ser-h# 6 (1+7) C+
Einstein Chess, AntiAndernach Chess



Solution: 


1.Sh6-g4=wP 2.Rh2-h6=wB 3.Bf6-h4=wS 4.f7-f5=wP 5.Bh7*f5=R 6.Rf5-f6=wB Sh4*g2=B #

  • All non-royal units change their color (black on diagram, white at the end of the solution).
T76 Ivan Skoba
Czech Republic
T76 ChessProblems.ca, 26.01.2012
2r5/4r3/3K4/7R/4NkNb/7P/8/1bB4R
ser-h# 215 (7+5) C+
Holes



Solution: 


7.Kd8 9.Rg8 11.Kf8 13.Re7 23.Ka1 24.Ba2 26.K*c1 28.Ka1 29.Bb1 39.Kf8 41.Rc8 43.Kd8 45.Re7 52.Kf4 55.Bg1 62.Kd8 64.Rg8 66.Kf8 68.Re7 78.Ka1 79.Ba2 86.K*h1 93.Ka1 94.Bb1 104.Kf8 106.Rc8 108.Kd8 110.Re7 117.Kf4 120.Bh4 127.Kd8 129.Rg8 131.Kf8 133.Re7 143.Ka1 144.Ba2 151.K*h3 158.Ka1 159.Bb1 169.Kf8 171.Rc8 173.Kd8 175.Re7 182.Kf4 185.Bg1 192.Kd8 194.Rg8 196.Kf8 198.Re7 208.Ka1 209.Ba2 215.Kg2 Se3 #

  • Pendulum of black King passing Zeller and Bishop traps. The entry tries to introduce basic series-mover manoeuvres that allow composing long problems. By using holes, the construction becomes very simple and light. We should also notice that the solution has three times 60 or more moves without capture!
T75 Alberto Armeni
Italy
T75 ChessProblems.ca, 26.01.2012
r5b1/8/4rP2/5P2/2P1N3/bpnP1p2/1np1pP2/1k2K3
ser-h== 12 (7+11) C?
Einstein Chess


Solution: 


1.R*f6=Q 2.B*c4=R 3.Rc-c8=B 4.B*f5=R 5.Rb5=B 6.B*d3=R 7.Rd1=B 8.Sd3=P 9.Bc1=S 10.Ra1=B 11.S3-a2=P 12.Qb2=R Sd2=P ==

  • Nice double-stalemate finale!
T74 Paul Răican
Romania
T74 ChessProblems.ca, 26.01.2012
8/1pp2r2/3b4/1pnk2rp/2pp4/Pp3nPp/1P3K2/5N2
ser-xz 41 (5+14) C+
Isardam


Solution: 


5.Kb4*b5 7.a4-a5 14.Ke8*f7 26.Ke2*f3 29.Sg4-e5 31.Kf4*g5 32.Kg5*h5 37.g7-g8=R 39.Rg3*b3 40.Rb3-c3 41.b2-b4 c4*b3 ep. x

  • Isardam ("Madrasi" spelled backwards) is a variant of Madrasi in which only moves that do not lead to a Madrasi paralysis are legal.
  • C+ Popeye v4.55 only.
T73 Mečislovas Rimkus
Lithuania
T73 ChessProblems.ca, 07.01.2012
k5K1/1r6/P7/8/8/1p6/7P/r7
ser-s# 14 (3+4) C+
GhostChess



Solution: 


5.h7-h8=R 7.Rh7*b7 12.Kc4*b3 13.Kb3-b2[+buPb3] 14.Kb2*a1 uPb3-b2 #


T72 Arno Tüngler
Germany
T72 ChessProblems.ca, 26.12.2011
8/pp5p/P7/kB6/P7/2KQ4/PNP5/bR5B
ser-h!= 30 (10+5) C+
VerticalMirrorCirce



Solution: 


4.h3-h2 5.b7*a6 6.a6*b5 [+wBc1] 7.b5*a4 9.a3*b2 12.Ka3*a2 16.Ka5-b6 21.a2*b1=B 22.Bb1*c2 [+wPf2] 23.Bc2*d3 [+wQe1] 25.Be4*h1 26.Bh1-f3 27.h2-h1=R 28.Rh1*e1 29.Re1-f1 30.b2*c1=Q + Kc3-d3 !=

  • Excelsior x 3 (BQR)!
T71 Ján Golha & Cornel Pacurar
Slovakia & Canada
T71 ChessProblems.ca, 19.12.2011
8/8/8/8/8/2Nk4/8/3B4
ser-h= 8 (2+1) C+
EquipollentsCirce
b) bKc4-->h1
c) bKc4-->d7
d) wBd6-->g3


Solutions: 

a)
1.Kc4-d3 2.Kd3*e4 [+wSf5] 3.Ke4*f5 [+wSg6] 4.Kf5-g5 5.Kg5-h6 6.Kh6*g6 [+wSf6] 7.Kg6-g7 8.Kg7-h8 Bd6-f8 =

b) bKc4->h1
1.Kh1-g2 2.Kg2-f3 3.Kf3*e4 [+wSd5] 4.Ke4*d5 [+wSc6] 5.Kd5*d6 [+wBd7] 6.Kd6-c7 7.Kc7-b7 8.Kb7-a8 Bd7-c8 =

c) bKc4->d7
1.Kd7-e6 2.Ke6-f5 3.Kf5*e4 [+wSd3] 4.Ke4-e3 5.Ke3*d3 [+wSc3] 6.Kd3-c2 7.Kc2-b2 8.Kb2-a1 Bd6-a3 =

d) wBd6->g3
1.Kc4-d4 2.Kd4*e4 [+wSf4] 3.Ke4-f3 4.Kf3*g3 [+wBh3] 5.Kg3*f4 [+wSe5] 6.Kf4-g3 7.Kg3-h2 8.Kh2-h1 Se5-f3 =

  • Wenigsteiner, 4-corner echoes.
  • No white King.
  • Version 20.12.2011.