MESON Chess Problem Database

Problem Display
PID: 188551 (8/2pK4/2Pn4/2kpR3/2P2p1B/3pnN2/B4p2/1R5Q w - - 0 1)

Petite, Efren

Phenix, 1992

8/2pK4/2Pn4/2kpR3/2P2p1B/3pnN2/B4p2/1R5Q

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Rxd5#
    • 1...Sf1
      • 2.Rxd5#
    • 1...Sc2
      • 2.Rxd5#
    • 1...Sg2
      • 2.Rxd5#
    • 1...Sg4
      • 2.Rxd5#
    • 1...Sef5
      • 2.Rxd5#
    • 1...Se4
      • 2.Rb5#
    • 1...Sb5
      • 2.Rxb5#
    • 1...Sdf5
      • 2.Rb5#
    • 1...Sb7
      • 2.Rb5#
    • 1...Sf7
      • 2.Rb5#
    • 1...Sc8
      • 2.Rb5#
    • 1...Se8
      • 2.Rb5#
  • Tries
    • 1.Bxf2?
      • threat
        • 2.Rxd5#
      • 1...Sb5
        • 2.Rxb5#
      • 1...Sxc4!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qa3#
      • 1...Sexc4
        • 2.Bxf2#
      • 1...Sdxc4
        • 2.Be7#
      • 1...Sb5
        • 2.Rxb5#
      • 1...Sc2
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • S(c);N_GUARD::R1(G),XP(f)
    • S(g);N_GUARD::R1(A)
    • S(g);N_GUARD::R1(A),XS(g)
  • Tries
    • Try
      • B(F);P_PINS(c),XP(a)
      • Threat
        • R1(G),XP(f)
      • Vars
        • S(g);N_GUARD::R1(A),XS(g)
      • Refutation
        • S(g);XP(E)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • S(c);OGATEB,P_SPINS(c),XP(E)::B(F),XP(a)
      • S(g);OGATEB,P_SPINS(g),XP(E)::B(F)
      • S(g);N_GUARD::R1(A),XS(g)
      • S(c);N_GUARD::R1(G),XP(f)
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