MESON Chess Problem Database

Problem Display
PID: 102968 (1b2R2B/2pK3B/2Q1N1P1/3N3p/2P1k1qR/5p2/3rpP2/8 w - - 0 1)

Gavrilov, Constantin Grigorievich

Kofman, Rafael Moiseevich

64 Shakhmatnoe obozrenie, 1931

1b2R2B/2pK3B/2Q1N1P1/3N3p/2P1k1qR/5p2/3rpP2/8

#2

11 + 8

6490 yacpdb 2009
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sb4#
    • 1...Rxd5+
      • 2.Qxd5#
  • Tries
    • 1.Bd4?
      • threat
        • 2.g7#
      • 1...Kd3
        • 2.Sb4#
      • 1...Kf5
        • 2.Se3#
        • 2.Se7#
      • 1...Rxd4!
    • 1.Rxg4+?
      • 1...Kd3
        • 2.Sb4#
        • 2.g7#
      • 1...Kf5
        • 2.Rf4#
      • 1...hxg4!
  • Keys
    • 1.Bf6!
      • threat
        • 2.g7#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Kd3
        • 2.Sb4#
      • 1...Kf5
        • 2.Sg7#

This anticipates 90575(1949)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);N_PINS(D),N_SPINQ(e),P_PINS(F),S_FLIGHT::S(D)
    • R(a);CHECK,OGATE,P_PINS(F),P_SPINR(a),XS(D)::QAB1(E),XR(a)
  • Tries
    • Try
      • B(K);N_SPINS(D),P_SPINS(F)
      • Threat
        • B(I)+P(G)
      • Vars
        • K(d);N_SPINQ(e),S_FLIGHT::S(D)
      • Refutation
        • R(a);N_PINS(F),P_PINS(D),XB(K)
    • Try
      • R(C);CHECK,XQ(e)
      • Vars
        • K(d);S_FLIGHT::R1(C)
      • Refutation
        • P(f);XR(C)
  • Actual
    • B(K);
    • Threat
      • B(I)+P(G)
    • Vars
      • R(a);CHECK,OGATE,P_PINS(F),P_SPINR(a),XS(D)::QAB1(E),XR(a)
      • K(d);N_PINS(D),N_SPINQ(e),P_PINS(F),S_FLIGHT::S(D)
      • K(d);N_SPINQ(e),S_FLIGHT::S(F)
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