MESON Chess Problem Database

Problem Display
PID: 53069 (8/BQ6/2pprPB1/3kP3/p4P2/K7/8/8 w - - 0 1)

Keeney, Palmer Gunkel

Chess Life, 1953

8/BQ6/2pprPB1/3kP3/p4P2/K7/8/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qxc6#
  • Tries
    • 1.Kxa4?
      • threat
        • 2.Qb3#
      • 1...Kc4
        • 2.Qxc6#
        • 2.Qb3#
      • 1...dxe5!
    • 1.Be4+?
      • 1...Kc4
        • 2.Qxc6#
        • 2.Qb4#
      • 1...Kxe4!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qa2#
        • 2.Qd3#
        • 2.Qe4#
      • 1...Kc4
        • 2.Qd3#
      • 1...Rxe5
        • 2.Qa2#
      • 1...Rxf6
        • 2.Qa2#
      • 1...dxe5
        • 2.Qd3#
      • 1...Re7
        • 2.Qa2#
      • 1...Re8
        • 2.Qa2#
      • 1...c5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(c),S_FLIGHT::QAR2(G),XP(c)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Threat
        • QAB(G)
      • Refutation
        • P(d);XP(C)
    • Try
      • B(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XB(E)
  • Actual
    • Q(G);N_PINP(c)
    • Threat
      • DUALS(3)
    • Vars
      • K(b);S_FLIGHT::QAB1(G)
      • R(e);XP(C)::QAB(G)
      • R(e);XP(D)::QAB(G)
      • P(d);XP(C)::QAR2(G)
      • R(e);::QAB(G)
      • P(c);::QAB1(G)
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