MESON Chess Problem Database

Problem Display
PID: 145005 (5Q2/4Bp2/4P1R1/4R3/4p1BP/4P1k1/8/6K1 w - - 0 1)

Morse, Christopher Jeremy

The Problemist, 1962

5Q2/4Bp2/4P1R1/4R3/4p1BP/4P1k1/8/6K1

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...fxe6
      • 2.Bxe6#
      • 2.Qf2#
      • 2.Qf4#
    • 1...fxg6
      • 2.Qf4#
  • Tries
    • 1.Be2+?
      • 1...Kh3
        • 2.Bf1#
      • 1...fxg6!
    • 1.Bb4?
      • threat
        • 2.Be1#
      • 1...Kxh4
        • 2.Be1#
      • 1...fxg6!
    • 1.Rh5?
      • threat
        • 2.Bd6#
        • 2.Qb8#
      • 1...fxe6
        • 2.Bxe6#
        • 2.Qf2#
        • 2.Qf4#
      • 1...fxg6
        • 2.Qf4#
      • 1...f5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Rxe4#
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
        • 2.Rd5#
        • 2.Rf5#
        • 2.Rh5#
      • 1...fxe6
        • 2.Rexe6#
      • 1...fxg6
        • 2.Rxe4#
      • 1...f6
        • 2.Rh5#
      • 1...f5
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE,XR(G)::QAB1(I)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(a);P-FLIGHT::B(C)
      • Refutation
        • P(c);XR(G)
    • Try
      • B(H);
      • Threat
        • B(H)
      • Vars
        • K(a);S_FLIGHT,XP(D)::B(H)
      • Refutation
        • P(c);XR(G)
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATE,XR(G)::QAB1(I)
      • Refutation
        • P(c);
  • Actual
    • Q(I);
    • Threat
      • DUALS(7)
    • Vars
      • P(c);OGATE,XP(F)::QAB(I)+R(E),XP(c)
      • P(c);XR(G)::QAB(I)+R(E),XP(b)
      • P(c);::QAB(I)+R(E)
      • P(c);::QAB(I)+R(E),XP(c)
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