MESON Chess Problem Database

Problem Display
PID: 11835 (K7/bP6/k1P5/8/P1N5/8/8/8 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

1st HM., Prapor peremogi, 1972

K7/bP6/k1P5/8/P1N5/8/8/8

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
5454 Near Snap 2008
3713 Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.b8S#
    • 1...Bf2
      • 2.b8S#
    • 1...Be3
      • 2.b8S#
    • 1...Bd4
      • 2.b8S#
    • 1...Bc5
      • 2.b8S#
    • 1...Bb6
      • 2.b8S#
  • Tries
    • 1.b8Q?
      • threat
        • 2.Qxa7#
        • 2.Qb5#
        • 2.Qb7#
        • 2.Qc8#
      • 1...Bg1
        • 2.Qb5#
        • 2.Qb7#
        • 2.Qc8#
      • 1...Bf2
        • 2.Qb5#
        • 2.Qb7#
        • 2.Qc8#
      • 1...Be3
        • 2.Qb5#
        • 2.Qb7#
        • 2.Qc8#
      • 1...Bd4
        • 2.Qb5#
        • 2.Qb7#
        • 2.Qc8#
      • 1...Bc5
        • 2.Qb5#
        • 2.Qb7#
        • 2.Qc8#
      • 1...Bb6
        • 2.Qxb6#
        • 2.Qb7#
        • 2.Qc8#
      • 1...Bxb8!
  • Keys
    • 1.c7!
      • 1...Bg1
        • 2.b8S#
      • 1...Bf2
        • 2.b8S#
      • 1...Be3
        • 2.b8S#
      • 1...Bd4
        • 2.b8S#
      • 1...Bc5
        • 2.b8S#
      • 1...Bb6
        • 2.b8S#
      • 1...Bb8
        • 2.cxb8S#

This anticipates 77507(1992), 264856(1993)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::P=S
  • Tries
    • Try
      • P(D);
      • Threat
        • DUALS(4)
      • Refutation
        • B(b);XQ(D)
  • Actual
    • P(C);
    • Vars
      • B(b);N_GUARD::P=S
      • B(b);OGATE::PXB(b)=S
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