MESON Chess Problem Database

Problem Display
PID: 104381 (4KN1b/6kP/4Pp2/3P4/1p2P3/pp6/6p1/Q1B5 w - - 0 1)

Michael, John

Pat a Mat, 1994

4KN1b/6kP/4Pp2/3P4/1p2P3/pp6/6p1/Q1B5

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qg3#
        • 2.Qc7#
      • 1...g1Q
        • 2.Qc7#
      • 1...g1R
        • 2.Qc7#
      • 1...bxc3!
    • 1.Qe5?
      • threat
        • 2.Qg3#
        • 2.Qc7#
      • 1...g1Q
        • 2.Qc7#
      • 1...g1R
        • 2.Qc7#
      • 1...fxe5!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qa7#
      • 1...g1Q
        • 2.Qxg1#
      • 1...g1B
        • 2.Qxg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR(A)
      • Refutation
        • P(d);N_SPINP(e),XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR(A)
      • Refutation
        • P(e);N_SPINP(e),XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • P(a);OGATEB::QAR(A),XQ(a)
      • P(a);OGATEB::QAR(A),XB(a)
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