MESON Chess Problem Database

Problem Display
PID: 134351 (2n5/1p1p2P1/3k1BNQ/4R1P1/1K1P4/6n1/8/2R2r1q w - - 0 1)

Guida, Marco

The Problemist, 2009

2n5/1p1p2P1/3k1BNQ/4R1P1/1K1P4/6n1/8/2R2r1q

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Be7#
    • 1...Sa7
      • 2.Be7#
    • 1...Se7
      • 2.Bxe7#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Be7#
      • 1...Qxh6
        • 2.Rd5#
      • 1...Qc6
        • 2.Bd8#
      • 1...Se7
        • 2.Bxe7#
      • 1...Rxc1!
    • 1.Sh4?
      • threat
        • 2.Be7#
      • 1...Rxc1
        • 2.Bd8#
      • 1...Rxf6
        • 2.Qxf6#
      • 1...Se7
        • 2.Bxe7#
      • 1...Qc6!
  • Keys
    • 1.Bd8!
      • threat
        • 2.Bc7#
      • 1...Rxc1
        • 2.Sh4#
      • 1...Qc6
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(g);N_GUARD::B(F)
    • S(g);N_GUARD::B(F),XS(g)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAR(H)+B(F),DCHECK
      • Vars
        • Q(b);N_GUARD,XQ(H)::R1(D)
        • Q(b);N_GUARD::QAR(H)+B(F)
        • S(g);::QAR(H)+B(F),DCHECK,XS(g)
      • Refutation
        • R(a);XR(A)
    • Try
      • S(G);
      • Threat
        • QAR(H)+B(F),DCHECK
      • Vars
        • R(a);N_GUARD,XR(A)::QAR(H)+B(F)
        • R(a);OGATE,P_SPINR(a),XB(F)::QAR2(H),XR(a)
        • S(g);::QAR(H)+B(F),DCHECK,XS(g)
      • Refutation
        • Q(b);
  • Actual
    • B(F);
    • Threat
      • B(F)
    • Vars
      • R(a);N_GUARD,XR(A)::QAR(H)+S(G)
      • Q(b);N_GUARD::QAR(H)+S(G)
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