MESON Chess Problem Database

Problem Display
PID: 203805 (3n1nR1/1p1k1bQr/2pP4/3NRP1p/B3N2B/8/K7/8 w - - 0 1)

Montgomerie, John

The Problemist, 1954

3n1nR1/1p1k1bQr/2pP4/3NRP1p/B3N2B/8/K7/8

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Sb6#
    • 1...Sg6
      • 2.Rxd8#
  • Tries
    • 1.Sc5+?
      • 1...Kxd6
        • 2.Be7#
      • 1...Kc8!
    • 1.Rxf8?
      • threat
        • 2.Rxd8#
      • 1...Kc8
        • 2.Rxd8#
      • 1...Se6
        • 2.Sb6#
        • 2.Sdf6#
        • 2.fxe6#
      • 1...Rh8!
    • 1.Qxf8?
      • threat
        • 2.Qxd8#
      • 1...Kc8
        • 2.Qxd8#
      • 1...Be8
        • 2.Sb6#
      • 1...Se6
        • 2.Sef6#
        • 2.Sb6#
        • 2.Sdf6#
        • 2.Qe7#
        • 2.Qc8#
      • 1...Bxd5+!
    • 1.Qxf7+?
      • 1...Rxf7
        • 2.Sb6#
      • 1...Sxf7
        • 2.Sb6#
      • 1...Kc8!
  • Keys
    • 1.Re8!
      • threat
        • 2.Rxd8#
      • 1...Kc8
        • 2.Rxd8#
      • 1...Kxe8
        • 2.Sf6#
      • 1...Sde6
        • 2.Sdf6#
      • 1...Sfe6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(h);N_PINS(E)::S(E)
    • S(h);OGATE::R1(J),XS(g)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(d);N_SPINB(e),N_SPINP(b),P-FLIGHT,XP(H)::B(D)
      • Refutation
        • K(d);N_SPINB(e),N_SPINP(b),S_FLIGHT
    • Try
      • R(J);XS(h)
      • Threat
        • R1(J),XS(g)
      • Vars
        • K(d);N_SPINB(e),N_SPINP(b),P_SPINS(g),S_FLIGHT::R1(J),XS(g)
      • Refutation
        • R(f);
    • Try
      • Q(I);N_PINB(e),XS(h)
      • Threat
        • QAR1(I),XS(g)
      • Vars
        • K(d);N_SPINP(b),P_SPINS(g),S_FLIGHT::QAR1(I),XS(g)
        • B(e);N_PINS(E)::S(E)
      • Refutation
        • B(e);CHECK,XS(E)
    • Try
      • Q(I);CHECK,N_SPINS(E),XB(e)
      • Vars
        • R(f);XQ(I)::S(E)
        • S(g);XQ(I)::S(E)
      • Refutation
        • K(d);N_SPINP(b),S_FLIGHT
  • Actual
    • R(F);
    • Threat
      • R1(F),XS(g)
    • Vars
      • K(d);N_SPINB(e),N_SPINP(b),P_SPINS(g),S_FLIGHT::R1(F),XS(g)
      • K(d);N_SPINB(e),P_SPINS(h),S_FLIGHT,XR(F)::S(C)
      • S(g);N_PINS(E)::S(E)
      • S(h);N_PINS(E)::S(E)
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