MESON Chess Problem Database

Problem Display
PID: 176432 (1nQ5/BP3K2/3p4/1RNkP1pR/2q5/1Bp2N2/1nP5/8 w - - 0 1)

Gab, Wolfgang

Schach-Echo, 1981

1nQ5/BP3K2/3p4/1RNkP1pR/2q5/1Bp2N2/1nP5/8

#2

11 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qe6#
    • 1...g4
      • 2.e6#
    • 1...dxe5
      • 2.Qe6#
  • Tries
    • 1.Qg4?
      • threat
        • 2.Qe4#
      • 1...dxc5
        • 2.Rxc5#
      • 1...dxe5
        • 2.Qe6#
      • 1...Kc6+!
    • 1.Qf5?
      • threat
        • 2.Qe4#
      • 1...dxc5
        • 2.Rxc5#
      • 1...dxe5
        • 2.Qe6#
      • 1...Kc6+!
  • Keys
    • 1.Sxg5!
      • threat
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sce4#
        • 2.Sa6#
        • 2.Sce6#
        • 2.Sd7#
      • 1...Kd4+
        • 2.Sce6#
      • 1...Kxe5+
        • 2.Sge6#
      • 1...Qxb3
        • 2.Sxb3#
      • 1...dxc5
        • 2.Qxc5#
      • 1...dxe5
        • 2.Sce4#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sa4
        • 2.Sxa4#
      • 1...Sa6
        • 2.Sxa6#
      • 1...Sd7
        • 2.Sxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • S(g);SBLOCK::QAB1(K)
    • P(e);::R(G)+P(F)
    • P(f);XP(F)::QAB1(K)
  • Tries
    • Try
      • Q(K);
      • Threat
        • QAB1(K)
      • Vars
        • P(f);OGATE,P_SPINP(f),XS(E)::R1(D),XP(f)
        • P(f);XP(F)::QAB1(K)
      • Refutation
        • K(d);CHECK,N_SPINQ(c),S_FLIGHT
    • Try
      • Q(K);
      • Threat
        • QAB1(K)
      • Vars
        • P(f);OGATE,P_SPINP(f),XS(E)::R1(D),XP(f)
        • P(f);P_SPINP(f),XP(F)::QAB1(K)
      • Refutation
        • K(d);CHECK,N_SPINQ(c),S_FLIGHT
  • Actual
    • S(C);XP(e)
    • Threat
      • DUALS(6)
    • Vars
      • K(d);CHECK,N_SPINQ(c),P-FLIGHT::B(H)+S(E),DCHECK
      • K(d);CHECK,N_SPINQ(c),P-FLIGHT,XP(F)::R(G)+S(C)
      • Q(c);N_SPINQ(c),XB(B)::R(D)+S(E),XQ(c)
      • P(f);OGATE,P_SPINP(f),XS(E)::QAR1(K),XP(f)
      • P(f);SBLOCK,XP(F)::R(D)+S(E)
      • S(a);::R(D)+S(E),XS(a)
      • S(g);::R(D)+S(E),XS(g)
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Developed and maintained by Brian Stephenson.
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