MESON Chess Problem Database

Problem Display
PID: 29048 (8/2p2N2/5Q2/K1kp4/2p5/8/8/8 w - - 0 1)

Murphy, Joseph

L'Opinion Publique, 1877

8/2p2N2/5Q2/K1kp4/2p5/8/8/8

#2

3 + 4

3248 Miniatures canadiennes 2000
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qxc3#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sb7#
      • 1...d4
        • 2.Qe5#
        • 2.Qc6#
      • 1...c3!
    • 1.Qe7+?
      • 1...Kc6
        • 2.Sd8#
      • 1...Kd4!
  • Keys
    • 1.Qb2!
      • 1...Kc6
        • 2.Qb5#
      • 1...c3
        • 2.Qxc3#
      • 1...d4
        • 2.Qb5#
      • 1...c6
        • 2.Qb6#

This anticipates 79228(1953), 135534(1988)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR2(B),XP(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Refutation
        • P(a);
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::S(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT::QAB1(B)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(c);SBLOCK::QAR1(B)
      • P(d);N_GUARD::QAB1(B)
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