MESON Chess Problem Database

Problem Display
PID: 43911 (8/3pNp2/2P1P1P1/1K2k1BR/Q3P3/1B4P1/8/4R3 w - - 0 1)

White, Alain Campbell

Norwich Mercury, 1906

8/3pNp2/2P1P1P1/1K2k1BR/Q3P3/1B4P1/8/4R3

#2

12 + 3

20 De Problemist 1931

SOLUTION

  • SOUND
  • Sets
    • 1...d6
      • 2.Qa1#
    • 1...f6
      • 2.Bf4#
  • Tries
    • 1.Kc5?
      • threat
        • 2.Qa1#
        • 2.Qd4#
      • 1...d5
        • 2.exd5#
      • 1...d6+!
    • 1.Rd1?
      • threat
        • 2.Qd4#
      • 1...dxc6+
        • 2.Sxc6#
      • 1...d5!
  • Keys
    • 1.Qb4!
      • 1...dxc6+
        • 2.Sxc6#
      • 1...dxe6
        • 2.Qc5#
      • 1...fxe6
        • 2.Bh4#
      • 1...fxg6
        • 2.Sxg6#
      • 1...d5
        • 2.exd5#
      • 1...d6
        • 2.Qc3#
      • 1...f5
        • 2.exf5#
      • 1...f6
        • 2.Bf4#

There are these versions: 109695

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAB(D)
    • P(c);SBLOCK::R(H)+B(G),DCHECK
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATE::R(A)+P(E),XP(b)
      • Refutation
        • P(b);CHECK
    • Try
      • R(A);
      • Threat
        • QAB1(D)
      • Vars
        • P(b);CHECK,XP(I)::S(L),XP(b)
      • Refutation
        • P(b);
  • Actual
    • Q(D);
    • Vars
      • P(b);CHECK,XP(I)::S(L),XP(b)
      • P(b);N_GUARD,XP(J)::QAR2(D)
      • P(c);N_GUARD,XP(J)::R(H)+B(G)
      • P(c);XP(K)::S(L),XP(c)
      • P(b);OGATE::R(A)+P(E),XP(b)
      • P(b);SBLOCK::QAB(D)
      • P(c);OGATE::R(A)+P(E),XP(c)
      • P(c);SBLOCK::R(H)+B(G),DCHECK
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