MESON Chess Problem Database

Problem Display
PID: 47727 (2Knk3/8/6N1/8/2B5/8/7b/6Q1 w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

2Knk3/8/6N1/8/2B5/8/7b/6Q1

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7
      • 2.Bb5#
  • Tries
    • 1.Qxh2?
      • threat
        • 2.Qh8#
      • 1...Sf7
        • 2.Bb5#
      • 1...Se6!
    • 1.Qe3+?
      • 1...Se6
        • 2.Qxe6#
      • 1...Be5!
    • 1.Qd4?
      • threat
        • 2.Qh8#
        • 2.Qd7#
        • 2.Qxd8#
      • 1...Se6
        • 2.Qd7#
      • 1...Be5
        • 2.Qd7#
        • 2.Qxd8#
      • 1...Bc7
        • 2.Qh8#
        • 2.Qd7#
      • 1...Sc6
        • 2.Qh8#
        • 2.Qd7#
      • 1...Sb7
        • 2.Qh8#
        • 2.Qd7#
      • 1...Sf7
        • 2.Bb5#
        • 2.Qd7#
      • 1...Bd6!
    • 1.Qc5?
      • threat
        • 2.Qe7#
        • 2.Qf8#
      • 1...Se6
        • 2.Qe7#
      • 1...Sc6
        • 2.Qf8#
        • 2.Qxc6#
      • 1...Bd6!
    • 1.Qb6?
      • threat
        • 2.Qxd8#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.Qb5#
        • 2.Qc6#
        • 2.Qe6#
      • 1...Sf7
        • 2.Bb5#
        • 2.Qb5#
        • 2.Qc6#
        • 2.Qe6#
      • 1...Bc7!
    • 1.Qa7?
      • threat
        • 2.Qd7#
        • 2.Qe7#
      • 1...Bd6
        • 2.Qd7#
      • 1...Sc6
        • 2.Bf7#
        • 2.Qd7#
        • 2.Qf7#
      • 1...Sb7
        • 2.Qa4#
      • 1...Bc7!
    • 1.Qd1?
      • threat
        • 2.Qd7#
        • 2.Qxd8#
      • 1...Se6
        • 2.Qd7#
      • 1...Bc7
        • 2.Qd7#
      • 1...Sc6
        • 2.Qd7#
      • 1...Sb7
        • 2.Qa4#
        • 2.Qd7#
      • 1...Sf7
        • 2.Bb5#
        • 2.Qa4#
        • 2.Qd7#
      • 1...Bd6!
    • 1.Qe1+?
      • 1...Se6
        • 2.Qxe6#
      • 1...Be5!
    • 1.Qg5?
      • threat
        • 2.Qe7#
        • 2.Qxd8#
      • 1...Se6
        • 2.Qe7#
      • 1...Bd6
        • 2.Qxd8#
      • 1...Bc7
        • 2.Qe7#
      • 1...Sb7
        • 2.Qe7#
        • 2.Qb5#
      • 1...Sf7
        • 2.Bb5#
        • 2.Qe7#
        • 2.Qb5#
      • 1...Sc6!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qd7#
      • 1...Se6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD,SBLOCK::B(B)
  • Tries
    • Try
      • Q(A);XB(a)
      • Threat
        • QAR(A)
      • Vars
        • S(b);N_GUARD,SBLOCK::B(B)
      • Refutation
        • S(b);
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(A),XS(b)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(b);::QAB1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XS(b)
      • Vars
        • S(b);N_GUARD::QAR2(A),XS(b)
        • S(b);N_GUARD::QAB(A),XS(b)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(A)
        • S(b);N_GUARD::QAB(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAB1(A)
        • B(a);::QAB1(A)
      • Refutation
        • B(a);
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(A),XS(b)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(A)
        • B(a);::QAR1(A),XS(b)
        • B(a);::QAR1(A)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • S(b);N_GUARD::QAR2(A),XS(b)
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