MESON Chess Problem Database

Problem Display
PID: 75254 (4K3/1pk5/B1N5/4N3/1Q6/8/8/8 w - - 0 1)

Morse, Christopher Jeremy

The Tablet, 1962

(First published on Sat Mar 10 1962)

4K3/1pk5/B1N5/4N3/1Q6/8/8/8

#2

5 + 2

145 StrateGems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kc8
      • 2.Qxb7#
    • 1...bxa6
      • 2.Qb8#
    • 1...b6
      • 2.Qe7#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Qxb7#
      • 1...Kxc6
        • 2.Qd6#
      • 1...Kc8
        • 2.Qxb7#
      • 1...bxc6
        • 2.Qd6#
        • 2.Qb6#
        • 2.Qb7#
      • 1...b5
        • 2.Qd6#
      • 1...b6
        • 2.Qd6#
        • 2.Qxb6#
      • 1...bxa6!
    • 1.Qd2?
      • threat
        • 2.Qd8#
      • 1...Kb6
        • 2.Qa5#
      • 1...Kc8
        • 2.Qd7#
        • 2.Qd8#
      • 1...bxa6!
    • 1.Qe7+?
      • 1...Kc8
        • 2.Bxb7#
        • 2.Qd8#
        • 2.Qxb7#
        • 2.Qd7#
      • 1...Kb6!
    • 1.Qd4?
      • threat
        • 2.Qd8#
      • 1...Kc8
        • 2.Qd7#
        • 2.Qd8#
      • 1...bxa6!
  • Keys
    • 1.Ke7!
      • threat
        • 2.Qxb7#
      • 1...Kc8
        • 2.Qxb7#
      • 1...bxa6
        • 2.Qb8#
      • 1...bxc6
        • 2.Qb7#
      • 1...b5
        • 2.Qa5#
      • 1...b6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINP(a)::QAB1(A),XP(a)
    • P(a);OGATE,XB(C)::QAB1(A)
    • P(a);SBLOCK::QAR2(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);P-FLIGHT,XS(D)::QAR1(A)
        • K(b);P-FLIGHT,P_SPINP(a)::QAB1(A),XP(a)
        • P(a);::QAB1(A)
      • Refutation
        • P(a);XB(C)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);XB(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • P(a);XB(C)
  • Actual
    • K(E);P-FLIGHT
    • Threat
      • QAR1(A),XP(a)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a)::QAB1(A),XP(a)
      • P(a);OGATE,XB(C)::QAB1(A)
      • P(a);XS(D)::QAR1(A)
      • P(a);N_GUARD::QAB(A)
      • P(a);SBLOCK::QAB1(A)
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