MESON Chess Problem Database

Problem Display
PID: 183496 (8/1pp5/kPP5/8/1K1Q4/8/8/8 w - - 0 1)

Lincoln, Robert A

Problem Observer, 2016

8/1pp5/kPP5/8/1K1Q4/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...cxb6
      • 2.Qa1#
  • Tries
    • 1.Qg1?
      • 1...cxb6
        • 2.Qa1#
      • 1...bxc6!
    • 1.Qf2?
      • 1...cxb6
        • 2.Qa2#
      • 1...bxc6!
    • 1.Qe3?
      • 1...cxb6
        • 2.Qa3#
      • 1...bxc6!
  • Keys
    • 1.bxc7!
      • 1...bxc6
        • 2.c8Q#
        • 2.c8B#
      • 1...b6
        • 2.Qa1#
      • 1...b5
        • 2.c8Q#
        • 2.c8B#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(c);SBLOCK,XP(C)::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • P(c);SBLOCK,XP(C)::QAR(B)
      • Refutation
        • P(b);XP(D)
    • Try
      • Q(B);
      • Vars
        • P(c);SBLOCK,XP(C)::QAR(B)
      • Refutation
        • P(b);XP(D)
    • Try
      • Q(B);
      • Vars
        • P(c);SBLOCK,XP(C)::QAR(B)
      • Refutation
        • P(b);XP(D)
  • Actual
    • P(C);XP(c)
    • Vars
      • P(b);XP(D)::P=Q
      • P(b);SBLOCK::QAR(B)
      • P(b);::P=Q
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