MESON Chess Problem Database

Problem Display
PID: 42047 (3b1B1n/1QNkpp1R/1P1p2P1/3PpK2/4N3/7B/8/8 w - - 0 1)

Barnes, Barry Peter

3rd HM., The Problemist, 1969

3b1B1n/1QNkpp1R/1P1p2P1/3PpK2/4N3/7B/8/8

#2

10 + 7

3751 FIDE Album (1968-1970) 1977
4199 Barnes about Chess Problems 2001
5373 Conquering Kings 2004

SOLUTION

  • SOUND
  • Sets
    • 1...e6+
      • 2.dxe6#
    • 1...fxg6+
      • 2.Kg5#
    • 1...f6
      • 2.Sxf6#
  • Tries
    • 1.Kg5+?
      • 1...f5
        • 2.Sf6#
        • 2.Bxf5#
      • 1...e6+!
    • 1.Se6+?
      • 1...Ke8
        • 2.Qc6#
      • 1...Bc7!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Qc6#
      • 1...e6+
        • 2.dxe6#
      • 1...fxg6+
        • 2.Kxe5#
      • 1...Kxd6
        • 2.Qc6#
      • 1...Bxc7
        • 2.Qxc7#
      • 1...exd6
        • 2.Ke4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(d);CHECK,OGATE,P_SPINP(e)::P(C),XP(d)
    • P(e);CHECK,N_GUARD,P_SPINP(d),XP(F)::B(A)+K(D)
    • P(e);P_SPINP(d)::S(B),XP(e)
  • Tries
    • Try
      • K(D);CHECK,P-FLIGHT
      • Refutation
        • P(d);CHECK,P_SPINP(d)
    • Try
      • S(H);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(G)
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • S(B);XP(b)
    • Threat
      • QAB1(G)
    • Vars
      • P(d);CHECK,OGATE,P_SPINP(e)::P(C),XP(d)
      • P(e);CHECK,N_GUARD,P_SPINP(d),XP(F)::B(A)+K(D),XP(a)
      • K(c);P-FLIGHT,P_SPINP(d),XS(B)::QAR1(G)
      • B(f);OGATE,P_SPINB(f),XS(H)::QAR1(G),XB(f)
      • P(d);N_GUARD,P_SPINP(e),XS(B)::B(A)+K(D)
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