MESON Chess Problem Database

Problem Display
PID: 53883 (1n1R4/5p2/N2Rpp2/3qN3/3k4/K2P2PB/7n/2Q5 w - - 0 1)

Keeney, Palmer Gunkel

Chess Life, 1955

1n1R4/5p2/N2Rpp2/3qN3/3k4/K2P2PB/7n/2Q5

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qf4#
    • 1...Qxd6+
      • 2.Qc5#
  • Tries
    • 1.Bxe6?
      • threat
        • 2.Rxd5#
      • 1...Qxd6+
        • 2.Qc5#
      • 1...Kxe5
        • 2.Qf4#
      • 1...fxe6!
    • 1.Qc4+?
      • 1...Kxe5
        • 2.Qf4#
      • 1...Ke3!
  • Keys
    • 1.Bf5!
      • 1...Qxd6+
        • 2.Qc5#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Sxa6
        • 2.Sc6#
      • 1...exf5
        • 2.Rxd5#
      • 1...fxe5
        • 2.Qc5#
      • 1...Sf1
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sg4
        • 2.Sf3#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sd7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINQ(c),S_FLIGHT,XS(F)::QAB1(A)
    • Q(c);CHECK,XR(H)::QAB1(A)
  • Tries
    • Try
      • B(E);XP(d)
      • Threat
        • R1(H),XQ(c)
      • Vars
        • Q(c);CHECK,XR(H)::QAB1(A)
        • K(b);N_SPINQ(c),S_FLIGHT,XS(F)::QAB1(A)
      • Refutation
        • P(f);XB(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINQ(c),OGATE,S_FLIGHT,XS(F)::QAB1(A)
      • Refutation
        • K(b);N_SPINQ(c),S_FLIGHT
  • Actual
    • B(E);
    • Vars
      • Q(c);CHECK,XR(H)::QAB1(A)
      • K(b);N_SPINQ(c),S_FLIGHT,XS(F)::QAB1(A)
      • S(g);N_GUARD,XS(G)::S(F)
      • P(d);N_GUARD,XB(E)::R1(H),XQ(c)
      • P(e);SBLOCK,XS(F)::QAB1(A)
      • S(a);N_GUARD::S(F)
      • S(a);N_GUARD::S(F),XS(a)
      • S(g);N_GUARD::S(F),XS(g)
      • S(g);N_GUARD::S(F)
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