MESON Chess Problem Database

Problem Display
PID: 150376 (3B4/1pr5/2p5/kPQ5/8/8/2PK4/8 w - - 0 1)

Ahlheim, Karl-Heinz

Source?, 1999

3B4/1pr5/2p5/kPQ5/8/8/2PK4/8

#2

5 + 4

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Kc3?
      • 1...Ka4
        • 2.Qb4#
      • 1...b6
        • 2.Qb4#
      • 1...cxb5!
    • 1.c4?
      • 1...cxb5
        • 2.Qxb5#
      • 1...b6
        • 2.Qa3#
      • 1...Ka4!
  • Keys
    • 1.c3!
      • 1...Ka4
        • 2.Qb4#
      • 1...cxb5
        • 2.Qa7#
      • 1...b6
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);N_SPINR(d),P-FLIGHT::QAR1(D)
        • P(c);N_SPINR(d),SBLOCK::QAB1(D)
      • Refutation
        • P(b);P_PINQ(D),P_SPINP(b),XP(C)
    • Try
      • P(A);
      • Vars
        • P(b);OGATE,P_SPINP(b),XP(C)::QAR1(D),XP(b)
        • P(c);N_SPINR(d),SBLOCK::QAR2(D)
      • Refutation
        • K(a);N_SPINR(d),P-FLIGHT
  • Actual
    • P(A);
    • Vars
      • K(a);N_SPINR(d),P-FLIGHT::QAR1(D)
      • P(b);P_SPINP(b),SBLOCK,XP(C)::QAR2(D)
      • P(c);N_SPINR(d),SBLOCK::QAB1(D)
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