MESON Chess Problem Database

Problem Display
PID: 45307 (B1b5/8/2n2BQp/3n1R2/3rkN2/3RN3/6P1/7K w - - 0 1)

Silberman, Giora

Al Hamishmar, 1960

B1b5/8/2n2BQp/3n1R2/3rkN2/3RN3/6P1/7K

#2

9 + 6

3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf5
      • 2.Qxf5#
    • 1...Sxe3
      • 2.Rxd4#
    • 1...Sxf4
      • 2.Re5#
  • Tries
    • 1.Rxd4+?
      • 1...Kxe3
        • 2.Qg3#
      • 1...Sxd4!
    • 1.Rxd5+?
      • 1...Bf5
        • 2.R5xd4#
        • 2.Qxf5#
      • 1...Kxf4!
    • 1.Rg5+?
      • 1...Bf5
        • 2.Qxf5#
      • 1...Kxf4!
    • 1.Rh5+?
      • 1...Bf5
        • 2.Qxf5#
      • 1...Kxf4!
    • 1.Qg4?
      • threat
        • 2.Qf3#
      • 1...Sxe3
        • 2.Rxd4#
        • 2.Re5#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sxf4!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qf3#
      • 1...Sxe3
        • 2.Re5#
      • 1...Sxf4
        • 2.Rxd4#
      • 1...Se5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(f);OGATE,P_SPINB(f),XR(F)::QAB1(H),XB(f)
    • S(c);P_SPINS(d),SBLOCK,XS(D)::R1(C),XR(a)
    • S(c);P_SPINS(d),SBLOCK,XS(E)::QAB(H)+R(F),DCHECK
  • Tries
    • Try
      • R(C);CHECK,XR(a)
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR2(H)
      • Refutation
        • S(d);P_SPINS(c),XR(C)
    • Try
      • R(F);CHECK,XS(c)
      • Refutation
        • K(b);P-FLIGHT,XS(E)
    • Try
      • R(F);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAB1(H),XB(f)
      • Refutation
        • K(b);P-FLIGHT,XS(E)
    • Try
      • R(F);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAB1(H),XB(f)
      • Refutation
        • K(b);P-FLIGHT,XS(E)
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • S(d);N_GUARD,P_SPINS(c)::R1(F),XS(d)
      • Refutation
        • S(c);P_SPINS(c),XS(E)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H)
    • Vars
      • S(c);P_SPINS(d),XS(D)::R1(F)
      • S(c);P_SPINS(d),XS(E)::R1(C),XR(a)
      • S(d);N_GUARD,P_SPINS(c)::R1(F),XS(d)
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