MESON Chess Problem Database

Problem Display
PID: 144757 (8/5r2/3PN2p/5kp1/R1Q1N3/8/2K5/B7 w - - 0 1)

Spence, Jack Lee

Chess, 1954

8/5r2/3PN2p/5kp1/R1Q1N3/8/2K5/B7

#2

7 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sf6?
      • threat
        • 2.Qe4#
      • 1...Kg6
        • 2.Qd3#
        • 2.Qe4#
      • 1...Rc7!
  • Keys
    • 1.Qd3!
      • threat
        • 2.S4c5#
        • 2.S4xg5#
      • 1...Rc7+
        • 2.S4c5#
      • 1...Kg4
        • 2.Sf6#
      • 1...Kxe6
        • 2.Sc5#
      • 1...Kg6
        • 2.Sf6#
      • 1...g4
        • 2.S4c5#
        • 2.S4g5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(D)
      • Refutation
        • R(d);P_PINQ(D)
  • Actual
    • Q(D);
    • Threat
      • DUALS(2)
    • Vars
      • R(d);CHECK::QAB(D)+S(E)
      • K(a);S_FLIGHT::R(C)+S(E),DCHECK
      • K(a);S_FLIGHT,XS(G)::S(E)
      • K(a);S_FLIGHT::QAB(D)+S(E)
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