MESON Chess Problem Database

Problem Display
PID: 28340 (8/3NQB2/1p6/1k6/8/1N6/2K5/8 w - - 0 1)

Fokin, Leonid V

Socialicheski Donbass, 1960

8/3NQB2/1p6/1k6/8/1N6/2K5/8

#2

5 + 2

3242 BCPS Rapid Solving (Cheltenham) 2001

SOLUTION

  • SOUND
  • Tries
    • 1.Bc4+?
      • 1...Ka4
        • 2.Sxb6#
      • 1...Kc6
        • 2.Se5#
        • 2.Sb8#
      • 1...Kxc4!
    • 1.Qc5+?
      • 1...Ka4
        • 2.Sxb6#
      • 1...Ka6
        • 2.Qxb6#
      • 1...bxc5!
    • 1.Qd6?
      • 1...Ka6
        • 2.Qxb6#
      • 1...Ka4!
  • Keys
    • 1.Be8!
      • 1...Ka4
        • 2.Sxb6#
      • 1...Kc4
        • 2.Sxb6#
      • 1...Ka6
        • 2.Sb8#
      • 1...Kc6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(a);S_FLIGHT::S(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XB(E)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::S(C),XP(b)
        • K(a);S_FLIGHT::QAR1(D),XP(b)
      • Refutation
        • P(b);XQ(D)
    • Try
      • Q(D);
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(D),XP(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(E);
    • Vars
      • K(a);S_FLIGHT::B(E)+S(C),DCHECK,XP(b)
      • K(a);S_FLIGHT::S(C),XP(b)
      • K(a);S_FLIGHT::S(C)
      • K(a);S_FLIGHT::B(E)+S(C)
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