MESON Chess Problem Database

Problem Display
PID: 227087 (5B2/1p6/2ppP3/2p4R/3pp3/k7/NNP2P2/1K1R2Q1 w - - 0 1)

Gamma, Alex

Schweizerische Schachzeitung, 1985

5B2/1p6/2ppP3/2p4R/3pp3/k7/NNP2P2/1K1R2Q1

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Rd3#
    • 1...c4
      • 2.Ra5#
    • 1...d5
      • 2.Bxc5#
  • Tries
    • 1.Rxd4?
      • threat
        • 2.Ra4#
      • 1...cxd4
        • 2.Ra5#
      • 1...c4
        • 2.Ra5#
      • 1...b5!
    • 1.Rh3+?
      • 1...e3
        • 2.Rd3#
      • 1...d3!
    • 1.Qg3+?
      • 1...e3
        • 2.Rd3#
      • 1...d3!
  • Keys
    • 1.Qg7!
      • 1...d3
        • 2.Qc3#
      • 1...e3
        • 2.Rd3#
      • 1...c4
        • 2.Ra5#
      • 1...d5
        • 2.Bxc5#
      • 1...b5
        • 2.Qa7#
      • 1...b6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::R(B)
    • P(d);OGATE,P_SPINP(f)::R(H)
    • P(f);OGATE,P_SPINP(d)::B(J),XP(d)
  • Tries
    • Try
      • R(B);XP(b)
      • Threat
        • R1(B)
      • Vars
        • P(d);OGATE,P_SPINP(f),XR(B)::R(H)
        • P(d);OGATE,P_SPINP(f)::R(H)
      • Refutation
        • P(g);
    • Try
      • R(H);CHECK
      • Vars
        • P(c);N_GUARD,P_SPINP(c)::R(B)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(C);CHECK
      • Vars
        • P(c);N_GUARD,P_SPINP(c)::R(B)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • Q(C);
    • Vars
      • P(b);OGATE::QAR2(C)
      • P(c);N_GUARD::R(B)
      • P(d);OGATE,P_SPINP(f)::R(H)
      • P(f);OGATE,P_SPINP(d)::B(J),XP(d)
      • P(g);OGATE::QAR(C)
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