MESON Chess Problem Database

Problem Display
PID: 53022 (b7/2NN1K2/q1rkP1R1/b7/B2p1p2/3p4/1Q2P3/8 w - - 0 1)

Keeney, Palmer Gunkel

The Chess Review, 1933

b7/2NN1K2/q1rkP1R1/b7/B2p1p2/3p4/1Q2P3/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc7
      • 2.Qb8#
    • 1...Bxc7
      • 2.Qxd4#
  • Tries
    • 1.Sb5+?
      • 1...Kd5
        • 2.Qxd4#
      • 1...Qxb5!
    • 1.Rg5?
      • threat
        • 2.Se8#
      • 1...Kxc7
        • 2.Qb8#
      • 1...Bxc7
        • 2.Qxd4#
      • 1...Qc8
        • 2.Sb5#
      • 1...Rxc7!
    • 1.Qb4+?
      • 1...Kxc7
        • 2.Qb8#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Bxb4!
    • 1.Qb5?
      • threat
        • 2.Se8#
        • 2.Qe5#
      • 1...Kxc7
        • 2.Qb8#
      • 1...Rxc7
        • 2.Qe5#
        • 2.e7#
      • 1...Bxc7
        • 2.Qe5#
      • 1...Qc8
        • 2.Qe5#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Qxb5!
  • Keys
    • 1.e4!
      • threat
        • 2.Se8#
      • 1...Kxc7
        • 2.Qb8#
      • 1...Rxc7
        • 2.e7#
      • 1...Bxc7
        • 2.Qxd4#
      • 1...dxe4 ep
        • 2.Qe5#
      • 1...fxe4 ep
        • 2.Qh2#
      • 1...Qc8
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(g);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
    • B(d);SBLOCK,XS(F)::QAR2(A),XP(b)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(g);P-FLIGHT::QAR1(A),XP(b)
      • Refutation
        • Q(e);XS(F)
    • Try
      • R(E);
      • Threat
        • S(F)
      • Vars
        • K(g);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
        • B(d);SBLOCK,XS(F)::QAR2(A),XP(b)
        • Q(e);N_GUARD::S(F)
      • Refutation
        • R(f);P_PINS(G),XS(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(g);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
        • R(f);N_GUARD,P_SPINR(f)::QAB1(A),XR(f)
      • Refutation
        • B(d);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(g);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
        • B(d);SBLOCK,XS(F)::QAB1(A)
        • Q(e);::QAB1(A)
        • R(f);N_GUARD::QAB1(A),XR(f)
      • Refutation
        • Q(e);XQ(A)
  • Actual
    • P(B);
    • Threat
      • S(F)
    • Vars
      • K(g);OGATEB,S_FLIGHT,XS(F)::QAB1(A)
      • R(f);P_PINS(G),SBLOCK,XS(F)::R(E)+P(D)
      • B(d);SBLOCK,XS(F)::QAR2(A),XP(b)
      • P(b);EP,OGATE,XP(B)::QAB1(A)
      • P(c);EP,OGATEB,XP(B)::QAB(A)
      • Q(e);N_GUARD::S(F)
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