MESON Chess Problem Database

Problem Display
PID: 69979 (4Q3/8/5p2/3Rbk2/3p1Pp1/3b4/2N2R2/K2B4 w - - 0 1)

Bikos, Spyros

Chess, 1950

4Q3/8/5p2/3Rbk2/3p1Pp1/3b4/2N2R2/K2B4

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Sxd4#
  • Tries
    • 1.Bxg4+?
      • 1...Ke4
        • 2.Rxd4#
      • 1...Kxg4!
    • 1.fxe5+?
      • 1...Ke4
        • 2.Rxd4#
      • 1...Kg5!
  • Keys
    • 1.Rxd4!
      • threat
        • 2.Se3#
      • 1...Bxd4+
        • 2.Sxd4#
      • 1...Bxc2
        • 2.Bxc2#
      • 1...Bxf4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::S(C),XP(b)
  • Tries
    • Try
      • B(B);CHECK,XP(c)
      • Vars
        • K(e);S_FLIGHT::R1(F),XP(b)
      • Refutation
        • K(e);N_SPINB(d),S_FLIGHT,XB(B)
    • Try
      • P(E);CHECK,XB(d)
      • Vars
        • K(e);S_FLIGHT::R1(F),XP(b)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • R(F);N_PINB(d),P_SPINR(F),XP(b)
    • Threat
      • S(C)
    • Vars
      • B(d);CHECK,XR(F)::S(C),XB(d)
      • B(a);OGATE,XS(C)::B(B),XB(a)
      • B(d);N_PINR(F),P_SPINB(d),XP(E)::R(F)
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