MESON Chess Problem Database

Problem Display
PID: 188541 (Q1bB4/prp5/kP1R4/bpP3R1/1p6/1N1B4/8/1K6 w - - 0 1)

Keeney, Palmer Gunkel

To Alain White, 1945

Q1bB4/prp5/kP1R4/bpP3R1/1p6/1N1B4/8/1K6

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb6
      • 2.Qxc8#
    • 1...Rb8
      • 2.Qxa7#
  • Tries
    • 1.bxc7+?
      • 1...Rb6
        • 2.Qxc8#
      • 1...Bb6!
  • Keys
    • 1.c6!
      • 1...Kxb6
        • 2.cxb7#
      • 1...Rxb6
        • 2.Sc5#
      • 1...Bxb6
        • 2.Bxb5#
      • 1...cxb6
        • 2.Bxb5#
      • 1...cxd6
        • 2.Bxb5#
      • 1...Rb8
        • 2.Qxa7#
      • 1...Bh3
        • 2.Qxb7#
      • 1...Bg4
        • 2.Qxb7#
      • 1...Bf5
        • 2.Qxb7#
      • 1...Be6
        • 2.Qxb7#
      • 1...Bd7
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(f);OGATEB,P_SPINR(f),XP(F)::QAB(H),XB(h)
    • R(f);N_GUARD::QAR1(H),XP(e)
  • Tries
    • Try
      • P(F);CHECK,XP(g)
      • Vars
        • R(f);P_SPINR(f),S_CUTB(b)::QAB(H),XB(h)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • P(D);
    • Vars
      • K(d);N_SPINP(c),P-FLIGHT,P_SPINP(g),XP(F)::R(G)+P(D),XR(f)
      • R(f);SBLOCK,XP(F)::S(B)
      • B(b);SBLOCK,XP(F)::B(C),XP(c)
      • P(g);XP(F)::B(C),XP(c)
      • P(g);XR(G)::B(C),XP(c)
      • R(f);N_GUARD::QAR1(H),XP(e)
      • B(h);N_GUARD::QAB1(H),XR(f)
      • B(h);N_GUARD,P_PINB(C)::QAB1(H),XR(f)
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Developed and maintained by Brian Stephenson.
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