MESON Chess Problem Database

Problem Display
PID: 146153 (2kb1nR1/K1B4R/2NPn3/2N5/8/8/8/8 w - - 0 1)

Lipton, Michael

6th Place, 01. McWilliam U-21 Ty., 1953

2kb1nR1/K1B4R/2NPn3/2N5/8/8/8/8

#2

7 + 4

14867 BCPS Library 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc7
      • 2.d7#
    • 1...Be7
      • 2.Sxe7#
    • 1...Sd7
      • 2.Se7#
    • 1...Sxh7
      • 2.Se7#
  • Tries
    • 1.Ka8?
      • threat
        • 2.Sa7#
      • 1...Bxc7
        • 2.d7#
      • 1...Sxc7+!
    • 1.Sd7?
      • threat
        • 2.Sb6#
      • 1...Sxd7
        • 2.Se7#
      • 1...Bxc7!
    • 1.Bxd8?
      • 1...Sxc5
        • 2.Rc7#
      • 1...Sxd8
        • 2.Se7#
        • 2.Rc7#
      • 1...Sxh7
        • 2.Se7#
        • 2.d7#
      • 1...Sd4
        • 2.Rc7#
      • 1...Sf4
        • 2.Rc7#
      • 1...Sg5
        • 2.Rc7#
      • 1...Sc7
        • 2.Rxc7#
      • 1...Sg6
        • 2.d7#
      • 1...Sd7
        • 2.Se7#
      • 1...Sg7!
    • 1.Rxf8?
      • threat
        • 2.Se7#
      • 1...Sxc5
        • 2.Rxd8#
      • 1...Sxf8!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sb6#
      • 1...Bxc7
        • 2.d7#
      • 1...Sd7
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • B(c);P_SPINS(d),SBLOCK,XB(E)::P(C)
    • B(c);N_GUARD,P_SPINS(d)::S(B),XB(c)
    • S(d);P_SPINB(c)::S(B)
    • S(d);P_SPINB(c),XR(F)::S(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • S(B)
      • Vars
        • B(c);P_SPINS(d),SBLOCK,XB(E)::P(C)
      • Refutation
        • S(a);CHECK,XB(E)
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • S(d);P_SPINB(c),SBLOCK,XS(A)::S(B)
      • Refutation
        • B(c);P_SPINS(d),XB(E)
    • Try
      • B(E);XB(c)
      • Vars
        • S(a);N_GUARD,XS(A)::R1(F)
        • S(a);N_GUARD::R1(F)
        • S(a);N_GUARD::R1(F),XS(a)
        • S(d);N_GUARD::P(C)
        • S(d);::S(B)
      • Refutation
        • S(a);
    • Try
      • R(G);P_PINB(c),XS(d)
      • Threat
        • S(B)
      • Vars
        • S(a);N_GUARD,XS(A)::R1(G),XB(c)
      • Refutation
        • S(a);N_SPINB(c),XR(G)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • B(c);P_SPINS(d),SBLOCK,XB(E)::P(C)
      • S(d);P_SPINB(c),SBLOCK::S(B)
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