MESON Chess Problem Database

Problem Display
PID: 71613 (2k5/K1P5/8/5b2/2Q5/B7/8/5B2 w - - 0 1)

Lincoln, Robert A

The Problemist, 2007

2k5/K1P5/8/5b2/2Q5/B7/8/5B2

#2

5 + 2

145 StrateGems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.c8Q#
    • 1...Bh3
      • 2.Bxh3#
  • Tries
    • 1.Bd6?
      • 1...Bb1
        • 2.Qe6#
      • 1...Bc2
        • 2.Qe6#
      • 1...Bd3
        • 2.Qe6#
      • 1...Bh3
        • 2.Bxh3#
      • 1...Be4
        • 2.Qe6#
      • 1...Bg4
        • 2.Qxg4#
      • 1...Be6
        • 2.Qxe6#
      • 1...Bg6
        • 2.Qe6#
      • 1...Bd7
        • 2.Qa6#
      • 1...Bh7
        • 2.Qe6#
      • 1...Kd7!
    • 1.Qd5?
      • threat
        • 2.Qd8#
      • 1...Bd7
        • 2.Qb7#
      • 1...Kxc7!
    • 1.Qa6+?
      • 1...Kd7
        • 2.c8Q#
      • 1...Kxc7!
    • 1.Qg8+?
      • 1...Kd7
        • 2.c8Q#
      • 1...Kxc7!
  • Keys
    • 1.Kb6!
      • 1...Kd7
        • 2.c8Q#
      • 1...Bb1
        • 2.Qe6#
      • 1...Bc2
        • 2.Qe6#
      • 1...Bd3
        • 2.Qe6#
      • 1...Bh3
        • 2.Bxh3#
      • 1...Be4
        • 2.Qe6#
      • 1...Bg4
        • 2.Qxg4#
      • 1...Be6
        • 2.Qxe6#
      • 1...Bg6
        • 2.Qe6#
      • 1...Bd7
        • 2.Qa6#
      • 1...Bh7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATE,S_FLIGHT::P=Q
    • B(a);OGATEB::B(A),XB(a)
  • Tries
    • Try
      • B(B);
      • Vars
        • B(a);N_GUARD::QAB(C)
        • B(a);OGATEB::B(A),XB(a)
        • B(a);OGATEB::QAB(C),XB(a)
        • B(a);N_GUARD::QAB(C),XB(a)
        • B(a);SBLOCK::QAB(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • B(a);SBLOCK::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT,XP(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::P=Q
      • Refutation
        • K(b);P-FLIGHT,XP(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::P=Q
      • Refutation
        • K(b);P-FLIGHT,XP(E)
  • Actual
    • K(D);S_FLIGHT
    • Vars
      • K(b);OGATE,S_FLIGHT::P=Q
      • B(a);N_GUARD::QAB(C)
      • B(a);OGATEB::B(A),XB(a)
      • B(a);OGATEB::QAB(C),XB(a)
      • B(a);N_GUARD::QAB(C),XB(a)
      • B(a);SBLOCK::QAB(C)
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