MESON Chess Problem Database

Problem Display
PID: 139905 (2bR4/Q2pr3/2P1R1pp/2bN2kN/3pPp2/3p1B1K/6n1/2B5 w - - 0 1)

Westbury, Eric Ernest

The Problemist, 1938

2bR4/Q2pr3/2P1R1pp/2bN2kN/3pPp2/3p1B1K/6n1/2B5

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rg7
      • 2.Re5#
    • 1...Rh7
      • 2.Re5#
    • 1...Se1
      • 2.Bxf4#
    • 1...Sh4
      • 2.Bxf4#
    • 1...d6
      • 2.Qxe7#
  • Tries
    • 1.Shxf4?
      • threat
        • 2.Rxg6#
      • 1...Sxf4+
        • 2.Bxf4#
      • 1...Rxe6
        • 2.Sxe6#
      • 1...dxe6
        • 2.Sxe6#
      • 1...Rg7
        • 2.Re5#
      • 1...Sh4
        • 2.Sxd3#
      • 1...d6
        • 2.Qxe7#
      • 1...dxc6!
  • Keys
    • 1.Sdxf4!
      • threat
        • 2.Rxg6#
      • 1...Sxf4+
        • 2.Bxf4#
      • 1...Rxe6
        • 2.Sxe6#
      • 1...gxh5
        • 2.Rg6#
      • 1...dxc6
        • 2.Qxc5#
      • 1...dxe6
        • 2.Sxe6#
      • 1...Rg7
        • 2.Re5#
      • 1...Sh4
        • 2.Sxd3#
      • 1...d5
        • 2.Rxd5#
      • 1...d6
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(j);N_GUARD::R(H)
    • S(a);N_GUARD::B(A),XP(d)
    • P(i);OGATE,P_PINR(H)::QAB(I),XR(j)
  • Tries
    • Try
      • S(F);XP(d)
      • Threat
        • R1(H),XP(g)
      • Vars
        • S(a);CHECK,OGATE,P_SPINS(a),XS(F)::B(A),XS(a)
        • R(j);XR(H)::B(A)+S(F),DCHECK,XR(j)
        • P(i);XR(H)::B(A)+S(F),DCHECK,XP(i)
        • R(j);N_GUARD::R(H)
        • S(a);N_GUARD::B(A)+S(F),XP(b)
        • P(i);OGATE,P_PINR(H)::QAB(I),XR(j)
      • Refutation
        • P(i);P_PINR(H),XP(G)
  • Actual
    • S(E);XP(d)
    • Threat
      • R1(H),XP(g)
    • Vars
      • S(a);CHECK,OGATE,P_SPINS(a),XS(E)::B(A),XS(a)
      • R(j);XR(H)::B(A)+S(E),DCHECK,XR(j)
      • P(g);XS(F)::R1(H)
      • P(i);N_GUARD,P_PINR(H),XP(G)::QAR(I),XB(e)
      • P(i);XR(H)::B(A)+S(E),DCHECK,XP(i)
      • R(j);N_GUARD::R(H)
      • S(a);N_GUARD::B(A)+S(E),XP(b)
      • P(i);OGATE,P_PINR(H)::R(J),XP(i)
      • P(i);OGATE,P_PINR(H)::QAB(I),XR(j)
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