MESON Chess Problem Database

Problem Display
PID: 23076 (1K1B4/8/k1P3Q1/n7/2P5/8/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

1K1B4/8/k1P3Q1/n7/2P5/8/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc6+
      • 2.Qxc6#
    • 1...Sb7
      • 2.cxb7#
  • Tries
    • 1.Qd3?
      • 1...Sxc4
        • 2.Qxc4#
      • 1...Sb3
        • 2.c5#
      • 1...Sb7
        • 2.c5#
      • 1...Sxc6+!
    • 1.Qf7?
      • threat
        • 2.Qa7#
      • 1...Sxc4
        • 2.Qxc4#
        • 2.Qb7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sxc6+!
    • 1.Qh7?
      • threat
        • 2.Qa7#
      • 1...Sxc4
        • 2.Qb7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sxc6+!
    • 1.Qg7?
      • threat
        • 2.Qa7#
      • 1...Sxc4
        • 2.Qb7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sxc6+!
  • Keys
    • 1.Qe6!
      • 1...Sxc6+
        • 2.Qxc6#
      • 1...Sxc4
        • 2.Qxc4#
      • 1...Sb3
        • 2.Qc8#
      • 1...Sb7
        • 2.cxb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);CHECK,OGATE,P_SPINS(a),XP(B)::QAR2(C),XS(a)
    • S(a);OGATE::QAR(C)+P(B),XS(a)
  • Tries
    • Try
      • Q(C);
      • Vars
        • S(a);OGATE,P_SPINS(a),XP(A)::QAB(C),XS(a)
        • S(a);N_GUARD::QAB(C)+P(A)
      • Refutation
        • S(a);CHECK,XP(B)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • S(a);CHECK,XP(B)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(a);N_GUARD,XP(A)::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • S(a);CHECK,XP(B)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(a);N_GUARD,XP(A)::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • S(a);CHECK,XP(B)
  • Actual
    • Q(C);
    • Vars
      • S(a);CHECK,OGATE,P_SPINS(a),XP(B)::QAR2(C),XS(a)
      • S(a);OGATE,XP(A)::QAB(C),XS(a)
      • S(a);N_GUARD::QAB(C)
      • S(a);OGATE::QAR(C)+P(B),XS(a)
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