MESON Chess Problem Database

Problem Display
PID: 48082 (7Q/8/7b/5Bpk/7P/8/5K2/8 w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

7Q/8/7b/5Bpk/7P/8/5K2/8

#2

4 + 3

3713 Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh4
      • 2.Qxh6#
  • Tries
    • 1.Qg7?
      • 1...Kxh4
        • 2.Qxh6#
      • 1...gxh4
        • 2.Bg4#
        • 2.Qg4#
        • 2.Qg6#
      • 1...g4
        • 2.Qxg4#
      • 1...Bxg7!
    • 1.Qh7?
      • 1...Kxh4
        • 2.Qxh6#
      • 1...gxh4
        • 2.Qg6#
      • 1...g4!
    • 1.hxg5?
      • threat
        • 2.Qxh6#
      • 1...Kh4
        • 2.Qxh6#
      • 1...Kxg5!
  • Keys
    • 1.Qf6!
      • 1...Kxh4
        • 2.Qxh6#
      • 1...gxh4
        • 2.Qg6#
      • 1...Bg7
        • 2.Qxg5#
      • 1...Bf8
        • 2.Qxg5#
      • 1...g4
        • 2.Bg6#

Anticipated by 232968(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,XP(B)::QAR2(D),XB(c)
  • Tries
    • Try
      • Q(D);N_PINB(c)
      • Vars
        • K(b);P-FLIGHT,XP(B)::QAR2(D),XB(c)
        • P(a);OGATE::QAB1(D),XP(a)
      • Refutation
        • B(c);XQ(D)
    • Try
      • Q(D);
      • Vars
        • K(b);P-FLIGHT,XP(B)::QAR2(D),XB(c)
        • P(a);SBLOCK,XP(B)::QAB1(D)
      • Refutation
        • P(a);
    • Try
      • P(B);XP(a)
      • Threat
        • QAR1(D),XB(c)
      • Vars
        • K(b);P-FLIGHT::QAR2(D),XB(c)
      • Refutation
        • K(b);N_SPINB(c),P-FLIGHT,XP(B)
  • Actual
    • Q(D);N_PINB(c)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a),XP(B)::QAR2(D),XB(c)
      • P(a);SBLOCK,XP(B)::QAB1(D)
      • B(c);N_GUARD::QAR1(D),XP(a)
      • P(a);SBLOCK::B(C)
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