MESON Chess Problem Database

Problem Display
PID: 174097 (8/8/2n1PRN1/2pq4/2P1kpP1/2R1PNb1/4P1K1/6B1 w - - 0 1)

Petite, Efren

4th HM., Berlingozzo-Coutinho Festival, 1985

8/8/2n1PRN1/2pq4/2P1kpP1/2R1PNb1/4P1K1/6B1

#2

11 + 6

1077 Boletim da UBP 1986

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Sd2#
      • 2.Sg5#
    • 1...Qd1
      • 2.Sg5#
    • 1...Qd2
      • 2.Sxd2#
      • 2.Sg5#
    • 1...Qd3
      • 2.Sg5#
      • 2.exd3#
    • 1...Qd4
      • 2.Sg5#
    • 1...Qe5
      • 2.Sd2#
    • 1...Qf5
      • 2.Sd2#
    • 1...Qg5
      • 2.Sd2#
      • 2.Sxg5#
    • 1...Qh5
      • 2.Sd2#
    • 1...Qd6
      • 2.Sg5#
    • 1...Qd7
      • 2.Sg5#
    • 1...Qd8
      • 2.Sg5#
    • 1...Be1
      • 2.Rxf4#
    • 1...Bf2
      • 2.Rxf4#
    • 1...Bh4
      • 2.Rxf4#
    • 1...Sd4
      • 2.Sd2#
    • 1...Se5
      • 2.Sg5#
    • 1...fxe3
      • 2.Rxe3#
  • Tries
    • 1.Rf5?
      • threat
        • 2.Sg5#
      • 1...Qxf5
        • 2.Sd2#
      • 1...fxe3
        • 2.Rxe3#
      • 1...Bh4
        • 2.Rxf4#
      • 1...Qd8!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Sd2#
      • 1...Qxd3
        • 2.Sg5#
      • 1...fxe3
        • 2.Rxe3#
      • 1...Be1
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • Q(e);N_GUARD::S(F)
    • B(a);N_GUARD::R1(J),XP(c)
    • S(f);S_CUTQ(e)::S(F)
    • P(c);OGATE,XP(E)::R1(D),XP(c)
  • Tries
    • Try
      • R(J);
      • Threat
        • S(F)
      • Vars
        • Q(e);N_GUARD,XR(J)::S(F)
        • P(c);OGATE,XP(E)::R1(D),XP(c)
        • B(a);N_GUARD::R1(J),XP(c)
      • Refutation
        • Q(e);
  • Actual
    • R(D);
    • Threat
      • S(F)
    • Vars
      • Q(e);N_GUARD,XR(D)::S(F)
      • P(c);OGATE,XP(E)::R1(D),XP(c)
      • B(a);N_GUARD::R1(J),XP(c)
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