MESON Chess Problem Database

Problem Display
PID: 23088 (k1K5/p7/nB6/8/8/8/1Q1n4/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

k1K5/p7/nB6/8/8/8/1Q1n4/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qg2#
    • 1...Sf1
      • 2.Qg2#
    • 1...Sb3
      • 2.Qg2#
    • 1...Sc4
      • 2.Qg2#
  • Tries
    • 1.Bg1?
      • threat
        • 2.Qb7#
      • 1...Sb3
        • 2.Qg2#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb4!
    • 1.Be3?
      • threat
        • 2.Qb7#
      • 1...Sb3
        • 2.Qg2#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb4!
    • 1.Bd4?
      • threat
        • 2.Qb7#
      • 1...Sb3
        • 2.Qg2#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb4!
    • 1.Ba5?
      • threat
        • 2.Qb7#
      • 1...Sb3
        • 2.Qg2#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb4!
    • 1.Bc5?
      • threat
        • 2.Qb7#
      • 1...Sxc5
        • 2.Qb8#
      • 1...Sb3
        • 2.Qg2#
      • 1...Sb4!
    • 1.Bc7?
      • threat
        • 2.Qb7#
      • 1...Sb3
        • 2.Qg2#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb4!
    • 1.Bd8?
      • threat
        • 2.Qb7#
      • 1...Sb3
        • 2.Qg2#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sb4!
    • 1.Qg7?
      • threat
        • 2.Qxa7#
        • 2.Qb7#
      • 1...axb6
        • 2.Qb7#
      • 1...Sc5
        • 2.Qxa7#
      • 1...Sc7!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qd5#
      • 1...axb6
        • 2.Qxa6#
      • 1...Sb4
        • 2.Qxa7#
      • 1...Sb3
        • 2.Qg2#
      • 1...Sc4
        • 2.Qg2#
      • 1...Sc5
        • 2.Qxa7#
      • 1...Sc7
        • 2.Qxa7#
      • 1...Sb8
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(a);OGATE::QAB(A)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);OGATE::QAB(A)
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);OGATE::QAB(A)
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);OGATE::QAB(A)
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);OGATE::QAB(A)
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • S(b);N_GUARD,XB(B)::QAR1(A)
        • S(a);OGATE::QAB(A)
      • Refutation
        • S(b);
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);OGATE::QAB(A)
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • B(B);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);OGATE::QAB(A)
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XB(B)::QAB1(A)
        • S(b);::QAR1(A),XP(c)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • P(c);OGATEB,P_SPINS(b),XB(B)::QAR2(A),XS(b)
      • S(b);OGATE,P_SPINP(c)::QAR1(A),XP(c)
      • S(a);OGATE::QAB(A)
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