MESON Chess Problem Database

Problem Display
PID: 235502 (3R4/3N1K2/8/2pk4/1nN5/1QB5/2R5/5B1b w - - 0 1)

Dikusarov, Andrey Nikolayovich

Shakhmaty v SSSR, 1968

3R4/3N1K2/8/2pk4/1nN5/1QB5/2R5/5B1b

#2

8 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Bxg2#
    • 1...Be4
      • 2.Sde5#
      • 2.Sb8#
    • 1...Sa2
      • 2.Qb7#
    • 1...Sxc2
      • 2.Qb7#
    • 1...Sa6
      • 2.Qb7#
    • 1...Sc6
      • 2.Sf6#
  • Tries
    • 1.Re2?
      • threat
        • 2.Sde5#
        • 2.Sb8#
      • 1...Sc6
        • 2.Sdb6#
        • 2.Sf6#
      • 1...Kc6!
  • Keys
    • 1.Be5!
      • 1...Ke4
        • 2.Sd6#
      • 1...Kc6
        • 2.Sa5#
      • 1...Sxc2
        • 2.Qb7#
      • 1...Bg2
        • 2.Bxg2#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Be4
        • 2.Sb8#
      • 1...Sa2
        • 2.Qb7#
      • 1...Sd3
        • 2.Qb7#
      • 1...Sa6
        • 2.Qb7#
      • 1...Sc6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::B(A),XB(a)
    • S(b);OGATE::QAB(C)
    • S(b);OGATE,XR(B)::QAB(C)
    • S(b);SBLOCK::R(H)+S(F),DCHECK
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • B(D);
    • Vars
      • K(d);S_FLIGHT::S(E)
      • S(b);OGATE,XR(B)::QAB(C)
      • B(a);N_GUARD::B(A),XB(a)
      • B(a);N_GUARD::QAB(C),XB(a)
      • B(a);SBLOCK::R(H)+S(F)
      • S(b);OGATE::QAB(C)
      • S(b);SBLOCK::R(H)+S(F),DCHECK
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