MESON Chess Problem Database

Problem Display
PID: 146962 (8/PkP5/1N6/3R4/3K4/8/8/7B w - - 0 1)

Bogdanov, Evgeny Mikhailovich

1st Comm., Prapor Peremogi TT, 1971

8/PkP5/1N6/3R4/3K4/8/8/7B

#2

6 + 1

145 StrateGems 2012

SOLUTION

  • SOUND
  • Tries
    • 1.Kc5?
      • 1...Ka6
        • 2.a8Q#
      • 1...Kxc7
        • 2.Rd7#
      • 1...Kxa7!
    • 1.Sa8?
      • 1...Kc6
        • 2.c8Q#
      • 1...Kxa7
        • 2.Ra5#
      • 1...Kxa8
        • 2.Ra5#
      • 1...Kc8
        • 2.Rd8#
      • 1...Ka6!
    • 1.a8S?
      • threat
        • 2.Ra5#
      • 1...Kc6
        • 2.c8Q#
      • 1...Ka7
        • 2.Ra5#
      • 1...Ka6!
  • Keys
    • 1.c8S!
      • 1...Ka6
        • 2.a8Q#
      • 1...Kc6
        • 2.Rc5#
      • 1...Kc7
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::P=Q
        • K(a);P-FLIGHT,XP(F)::R1(C)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::P=Q
        • K(a);P-FLIGHT,XP(E)::R(C)
        • K(a);S_FLIGHT,XS(D)::B(A)+R(C)
        • K(a);S_FLIGHT::R1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(E);
      • Threat
        • B(A)+R(C)
      • Vars
        • K(a);S_FLIGHT::P=Q
        • K(a);P-FLIGHT::R(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • P(F);
    • Vars
      • K(a);S_FLIGHT::P=Q
      • K(a);S_FLIGHT::B(A)+R(C),DCHECK
      • K(a);P-FLIGHT::R1(C)
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