MESON Chess Problem Database

Problem Display
PID: 272474 (2b5/4p1PK/2P1R3/1NPkb2p/Q1p2R1r/2npB2B/1n6/8 w - - 0 1)

Petite, Efren

diagrammes, 1977

2b5/4p1PK/2P1R3/1NPkb2p/Q1p2R1r/2npB2B/1n6/8

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf4
      • 2.Sxc3#
    • 1...Bd6
      • 2.Sxc3#
    • 1...Bf6
      • 2.Sc7#
    • 1...Bc7
      • 2.Sxc3#
      • 2.Sxc7#
    • 1...Bxg7
      • 2.Sc7#
    • 1...Bb8
      • 2.Sxc3#
    • 1...Sbd1
      • 2.Qxc4#
  • Tries
    • 1.Bg2+?
      • 1...Kxe6
        • 2.g8Q#
        • 2.g8B#
      • 1...Se4!
    • 1.Rd6+?
      • 1...exd6
        • 2.Sc7#
      • 1...Bxd6!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Rfxe5#
      • 1...Ke4
        • 2.Rexe5#
      • 1...Kxe6
        • 2.g8Q#
        • 2.g8B#
      • 1...Bxe6
        • 2.Sxc3#
      • 1...Re4
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(g);N_GUARD,XR(D)::S(E),XS(b)
    • B(g);N_GUARD::S(E),XS(b)
    • B(g);N_GUARD::S(E)
    • B(g);N_GUARD,XP(I)::S(E)
    • S(a);N_GUARD::QAB1(C),XP(d)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(f);S_CUTS(b),S_FLIGHT,XR(H)::P=Q
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • R(H);CHECK
      • Vars
        • P(i);XR(H)::S(E)
      • Refutation
        • B(g);XR(H)
  • Actual
    • R(D);P_PINB(g)
    • Threat
      • R1(D),XB(g)
    • Vars
      • K(f);N_GUARD,P_SPINP(d),S_FLIGHT::R1(H),XB(g)
      • K(f);N_SPINB(g),S_FLIGHT,XR(H)::P=Q
      • B(j);SBLOCK,XR(H)::S(E),XS(b)
      • R(e);SBLOCK::S(E)
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Developed and maintained by Brian Stephenson.
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