MESON Chess Problem Database

Problem Display
PID: 79509 (7R/2pN2B1/1pP1Bp2/1PP2p2/K1NkPP2/2p3P1/2Pb4/3R4 w - - 0 1)

Petite, Efren

Problem Observer, 2008

7R/2pN2B1/1pP1Bp2/1PP2p2/K1NkPP2/2p3P1/2Pb4/3R4

#2

14 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...fxe4
      • 2.Bxf6#
  • Tries
    • 1.Rxd2+?
      • 1...Kxe4
        • 2.Bd5#
      • 1...cxd2!
    • 1.Rd8?
      • 1...fxe4
        • 2.Bxf6#
      • 1...bxc5
        • 2.Sxf6#
      • 1...Kxe4!
  • Keys
    • 1.Sxf6!
      • 1...Kxc5
        • 2.Sd7#
      • 1...fxe4
        • 2.Sd7#
      • 1...bxc5
        • 2.Rd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK,XP(F)::B(M),XP(f)
  • Tries
    • Try
      • R(A);CHECK,XB(a)
      • Vars
        • K(c);N_SPINP(f),P-FLIGHT,XP(F)::B(K)
      • Refutation
        • P(b);XR(A)
    • Try
      • R(N);
      • Vars
        • P(d);SBLOCK,XP(F)::B(M),XP(f)
        • P(e);SBLOCK,XP(I)::R(N)+S(L),XP(f)
      • Refutation
        • K(c);N_SPINB(a),N_SPINP(f),P-FLIGHT,XP(F)
  • Actual
    • S(L);XP(f)
    • Vars
      • K(c);N_SPINB(a),S_FLIGHT,XP(I)::S(L)
      • P(d);SBLOCK,XP(F)::B(M)+S(L)
      • P(e);SBLOCK,XP(I)::R(N)
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