MESON Chess Problem Database

Problem Display
PID: 211713 (bQ6/1nPP4/P1p5/kNN2R2/p1B5/8/Kn1P4/1R6 w - - 0 1)

Hermanson, Halvar

The Problemist, 1986

bQ6/1nPP4/P1p5/kNN2R2/p1B5/8/Kn1P4/1R6

#2

11 + 6

SOLUTION

  • SOUND
  • Tries
    • 1.Sd6?
      • 1...Kb4
        • 2.Sd3#
      • 1...Kb6
        • 2.Sxa4#
      • 1...Sxc4
        • 2.Sxc4#
      • 1...Sxc5
        • 2.Rxc5#
      • 1...Sxd6
        • 2.Sb3#
      • 1...Sd1
        • 2.Scxb7#
      • 1...Sd3
        • 2.Scxb7#
      • 1...Sd8
        • 2.Sb3#
        • 2.cxd8Q#
        • 2.cxd8B#
      • 1...a3!
  • Keys
    • 1.Sa3!
      • 1...Kb4
        • 2.Sd3#
      • 1...Kb6
        • 2.Sxa4#
      • 1...Sxc4
        • 2.Sxc4#
      • 1...Sxc5
        • 2.Rxc5#
      • 1...Sd1
        • 2.Sxb7#
      • 1...Sd3
        • 2.Sxb7#
      • 1...Sd6
        • 2.Sb3#
      • 1...Sd8
        • 2.Sb3#
        • 2.cxd8Q#
        • 2.cxd8B#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Vars
        • K(c);P_SPINS(a),S_FLIGHT::S(F)
        • K(c);P_SPINS(a),S_FLIGHT::S(F),XP(b)
        • S(a);XB(D)::S(E),XS(a)
        • S(e);OGATE,P_SPINS(e),XS(F)::R(G),XS(e)
        • S(e);XS(E)::R(G)+S(F),DCHECK
        • S(a);::R(G)+S(F),DCHECK,XS(e)
      • Refutation
        • P(b);
  • Actual
    • S(E);
    • Vars
      • K(c);P_SPINS(a),S_FLIGHT::S(F)
      • K(c);P_SPINS(a),S_FLIGHT::S(F),XP(b)
      • S(a);XB(D)::S(E),XS(a)
      • S(e);OGATE,P_SPINS(e),XS(F)::R(G),XS(e)
      • S(a);::R(G)+S(F),DCHECK,XS(e)
      • S(e);::R(G)+S(F),DCHECK
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