MESON Chess Problem Database

Problem Display
PID: 97295 (2B5/2Np1K2/1pk5/2P2N2/P2Pr3/8/6Qb/2R5 w - - 0 1)

Stocchi, Ottavio

Problemi di Ottavio Stocchi, 1995

2B5/2Np1K2/1pk5/2P2N2/P2Pr3/8/6Qb/2R5

#2

9 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.cxd6#
    • 1...Bxc7
      • 2.Se7#
    • 1...d5
      • 2.cxd5 ep#
    • 1...d6
      • 2.cxd6#
  • Tries
    • 1.Qxe4+?
      • 1...d5
        • 2.cxd5 ep#
      • 1...Kxc7!
  • Keys
    • 1.Sa8!
      • threat
        • 2.Se7#
      • 1...Kd5
        • 2.Bb7#
      • 1...bxc5
        • 2.Rxc5#
      • 1...d5
        • 2.cxb6#
      • 1...Bd6
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);OGATE::R(A)+P(E),XB(a)
    • B(a);SBLOCK,XS(G)::S(F)
    • P(e);N_SPINR(b),OGATE::R(A)+P(E),XP(e),EP
    • P(e);OGATE::R(A)+P(E),XP(e)
  • Tries
    • Try
      • Q(B);CHECK,XR(b)
      • Vars
        • P(e);OGATE,P_SPINP(e)::R(A)+P(E)DCHECK,XP(e),EP
      • Refutation
        • K(d);P-FLIGHT,XS(G)
  • Actual
    • S(G);
    • Threat
      • S(F)
    • Vars
      • K(d);S_FLIGHT::B(I)
      • P(c);OGATE,P_SPINP(c),XP(E)::R1(A),XP(c)
      • P(e);N_SPINR(b),SBLOCK::R(A)+P(E),XP(c)
      • B(a);S_CUTP(e)::QAB(B),XR(b)
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