MESON Chess Problem Database

Problem Display
PID: 11721 (1n4B1/2ppp2b/P1P1Pk1P/R1N1pPpK/8/8/8/1Q6 w g5 0 1)

Maleika, Gerhard

Main-Post, 1971

1n4B1/2ppp2b/P1P1Pk1P/R1N1pPpK/8/8/8/1Q6

#2

10 + 8

3335 Cyclone 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Sxa6
      • 2.Sxd7#
    • 1...Sxc6
      • 2.Sxd7#
    • 1...e4
      • 2.Sxe4#
  • Tries
    • 1.Kg4?
      • threat
        • 2.Se4#
      • 1...Bxf5+
        • 2.Qxf5#
      • 1...e4
        • 2.Sxe4#
        • 2.Qa1#
        • 2.Qb2#
      • 1...d5!
    • 1.Qc1?
      • threat
        • 2.Qxg5#
      • 1...Kxf5
        • 2.Qxg5#
        • 2.Qf1#
      • 1...e4
        • 2.Sxe4#
      • 1...g4
        • 2.Qg5#
      • 1...Bg6+!
    • 1.Qf1?
      • threat
        • 2.Se4#
      • 1...Bg6+
        • 2.fxg6#
      • 1...e4
        • 2.Sxe4#
      • 1...d5!
  • Keys
    • 1.fxg5 ep!
      • threat
        • 2.Qf1#
      • 1...Bxg6+
        • 2.Qxg6#
      • 1...e4
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(h);N_GUARD,XP(F)::S(C),XP(e)
    • S(h);N_GUARD,XP(G)::S(C),XP(e)
    • P(a);::S(C),XP(a)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • S(C)
      • Vars
        • B(g);CHECK,OGATE,XP(D)::QAR1(A),XB(g)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(b)
      • Vars
        • P(a);::S(C),XP(a)
        • P(b);::QAB1(A)
      • Refutation
        • B(g);CHECK
    • Try
      • Q(A);
      • Threat
        • S(C)
      • Vars
        • B(g);CHECK,OGATE::QAR(A)+P(D),XB(g)
        • P(a);::S(C),XP(a)
      • Refutation
        • P(e);
  • Actual
    • P(D);EP,XP(b)
    • Threat
      • QAR(A)
    • Vars
      • B(g);CHECK,OGATE,XP(D)::QAR1(A),XB(g)
      • P(a);::S(C),XP(a)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).