MESON Chess Problem Database

Problem Display
PID: 75090 (5BB1/8/K3N2r/Rp1kbQ2/3N1p2/1pPb1P2/1P6/2nR4 w - - 0 1)

Gamage, Frederick

Hassberg, Eric Manfred

1st Prize, British Chess Magazine, 1945

5BB1/8/K3N2r/Rp1kbQ2/3N1p2/1pPb1P2/1P6/2nR4

#2

11 + 8

5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Sxf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sc7#
      • 2.Sg7#
      • 2.Sd8#
    • 1...Rh2
      • 2.Sxf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sc7#
      • 2.Sg7#
      • 2.Sd8#
    • 1...Rh3
      • 2.Sxf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sc7#
      • 2.Sg7#
      • 2.Sd8#
    • 1...Rh4
      • 2.Sxf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sc7#
      • 2.Sg7#
      • 2.Sd8#
    • 1...Rh5
      • 2.Sxf4#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sc7#
      • 2.Sg7#
      • 2.Sd8#
    • 1...Rxe6+
      • 2.Bxe6#
      • 2.Qxe6#
    • 1...Rh7
      • 2.Sxf4#
      • 2.Sc7#
      • 2.Sg7#
    • 1...Rh8
      • 2.Sxf4#
      • 2.Sc7#
    • 1...Bc4
      • 2.Qe4#
  • Tries
    • 1.Ka7?
      • threat
        • 2.Sxf4#
        • 2.Sc7#
      • 1...Rh7+
        • 2.Sc7#
        • 2.Sg7#
      • 1...Rxe6
        • 2.Bxe6#
        • 2.Qxe6#
      • 1...Kc4!
    • 1.Kb7?
      • threat
        • 2.Sxf4#
        • 2.Sc7#
      • 1...Rh7+
        • 2.Sc7#
        • 2.Sg7#
      • 1...Rxe6
        • 2.Bxe6#
        • 2.Qxe6#
      • 1...Kc4!
    • 1.Rxb5+?
      • 1...Kc4
        • 2.Rc5#
      • 1...Bxb5+!
    • 1.Qe4+?
      • 1...Kc4
        • 2.Qc6#
      • 1...Bxe4!
    • 1.Qxe5+?
      • 1...Kc4
        • 2.Qxb5#
        • 2.Qc5#
      • 1...Kxe5!
    • 1.c4+?
      • 1...Bxc4
        • 2.Qe4#
      • 1...Kxc4!
  • Keys
    • 1.Sxb5!
      • threat
        • 2.Qe4#
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Kc4
        • 2.Sa3#
      • 1...Kc6
        • 2.Sd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD,SBLOCK::QAB1(G)
  • Tries
    • Try
      • K(H);N_SPINS(I),P-FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(f);N_SPINB(g),N_SPINP(e),S_FLIGHT
    • Try
      • K(H);N_SPINS(I),S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(f);N_SPINB(g),N_SPINP(e),S_FLIGHT
    • Try
      • R(F);CHECK,P_SPINR(F),XP(e)
      • Vars
        • K(f);N_PINR(F),N_SPINB(g),S_FLIGHT::R1(F)
      • Refutation
        • B(c);CHECK,XR(F)
    • Try
      • Q(G);CHECK,N_PINB(g)
      • Vars
        • K(f);N_SPINP(e),OGATE,S_FLIGHT::QAR2(G)
      • Refutation
        • B(c);XQ(G)
    • Try
      • Q(G);CHECK,XB(g)
      • Refutation
        • K(f);P-FLIGHT,XQ(G)
    • Try
      • P(C);CHECK
      • Vars
        • B(c);SBLOCK,XP(C)::QAB1(G)
      • Refutation
        • K(f);N_SPINB(g),N_SPINP(e),S_FLIGHT,XP(C)
  • Actual
    • S(E);N_PINB(g),N_SPINS(I),P_PINB(c),P_SPINS(E),XP(e)
    • Threat
      • QAB1(G)
    • Vars
      • R(h);CHECK,OGATE,P_SPINR(h),XS(I)::QAB1(G),XR(h)
      • K(f);N_PINS(E),N_SPINB(c),P_PINS(I),S_FLIGHT::S(E)
      • K(f);N_SPINB(c),S_FLIGHT::S(I)
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