MESON Chess Problem Database

Problem Display
PID: 15791 (K1k5/8/1B2P2b/2n5/8/8/8/1Q6 w - - 0 1)

Lincoln, Robert A

2nd HM., US Problem Bulletin, 1987

K1k5/8/1B2P2b/2n5/8/8/8/1Q6

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Tries
    • 1.Qh7?
      • threat
        • 2.Qc7#
      • 1...Sxe6
        • 2.Qb7#
      • 1...Bf4
        • 2.Qg8#
        • 2.Qh8#
      • 1...Sa6
        • 2.Qb7#
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
        • 2.exd7#
      • 1...Bg7!
    • 1.Qh1?
      • threat
        • 2.Qc6#
      • 1...Sxe6
        • 2.Qb7#
      • 1...Bf4
        • 2.Qh8#
      • 1...Sa6
        • 2.Qb7#
      • 1...Se4!
    • 1.Qb5?
      • threat
        • 2.Qc6#
        • 2.Qe8#
        • 2.Qxc5#
      • 1...Bf4
        • 2.Qe8#
      • 1...Be3
        • 2.Qc6#
        • 2.Qe8#
      • 1...Bg5
        • 2.Qc6#
        • 2.Qxc5#
      • 1...Bf8
        • 2.Qc6#
        • 2.Qe8#
      • 1...Sb3
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qd7#
        • 2.Qe8#
      • 1...Sd3
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qd7#
        • 2.Qe8#
      • 1...Sa4
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qd7#
        • 2.Qe8#
      • 1...Se4
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qd7#
        • 2.Qe8#
      • 1...Sa6
        • 2.Qxa6#
        • 2.Qd7#
        • 2.Qe8#
      • 1...Sb7
        • 2.Qc6#
        • 2.Qd7#
      • 1...Sd7
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qxd7#
        • 2.exd7#
      • 1...Sxe6!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qxc5#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Bf4
        • 2.Qf8#
      • 1...Be3
        • 2.Qf8#
      • 1...Bf8
        • 2.Qxf8#
      • 1...Sb3
        • 2.e7#
      • 1...Sd3
        • 2.e7#
      • 1...Sa4
        • 2.e7#
      • 1...Se4
        • 2.e7#
      • 1...Sa6
        • 2.e7#
      • 1...Sb7
        • 2.e7#
      • 1...Sd7
        • 2.exd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD,XP(C)::QAB1(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • S(a);N_GUARD,XP(C)::QAB1(A)
        • B(b);OGATE::QAR(A)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(b);::QAR2(A)
      • Refutation
        • S(a);XP(C)
  • Actual
    • Q(A);
    • Threat
      • QAR(A),XS(a)
    • Vars
      • S(a);OGATE,P_SPINS(a),XP(C)::QAB(A),XS(a)
      • B(b);N_GUARD::QAR(A)
      • B(b);N_GUARD::QAR(A),XB(b)
      • S(a);N_GUARD::QAB(A)+P(C)
      • S(a);OGATE::P(C),XS(a)
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