MESON Chess Problem Database

Problem Display
PID: 109695 (8/2pNp3/1P1P1P2/RB1k2K1/3P3Q/1P4B1/3R4/8 w - - 0 1)

White, Alain Campbell

Norwich Mercury, 1906

8/2pNp3/1P1P1P2/RB1k2K1/3P3Q/1P4B1/3R4/8

#2

12 + 3

2634 Good Companions (November) 1916
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.Bc4#
    • 1...e6
      • 2.Qh1#
  • Tries
    • 1.Kf5?
      • threat
        • 2.Qh1#
        • 2.Qe4#
      • 1...e5
        • 2.dxe5#
      • 1...e6+!
    • 1.Re2?
      • threat
        • 2.Qe4#
      • 1...exf6+
        • 2.Sxf6#
      • 1...e5!
  • Keys
    • 1.Qg4!
      • 1...exf6+
        • 2.Sxf6#
      • 1...cxb6
        • 2.Sxb6#
      • 1...cxd6
        • 2.Ba4#
      • 1...exd6
        • 2.Qf5#
      • 1...e5
        • 2.dxe5#
      • 1...c5
        • 2.dxc5#
      • 1...c6
        • 2.Bc4#
      • 1...e6
        • 2.Qf3#

This is a version of 43911

FEATURES

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