MESON Chess Problem Database

Problem Display
PID: 143709 (2Q5/b3p3/1p2KnR1/1p1pn3/1N3k2/5PR1/3r4/1B3N2 w - - 0 1)

Petite, Efren

US Problem Bulletin, 1964

2Q5/b3p3/1p2KnR1/1p1pn3/1N3k2/5PR1/3r4/1B3N2

#2

8 + 9

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qxd2#
      • 1...Sc4
        • 2.Sd3#
      • 1...Seg4
        • 2.Sd3#
      • 1...Se4
        • 2.Sxd5#
      • 1...Sfg4
        • 2.Sxd5#
      • 1...Sxf3!
    • 1.Qc7?
      • threat
        • 2.Qxe5#
      • 1...Re2
        • 2.Sd3#
      • 1...Sg4
        • 2.R6xg4#
      • 1...Sd7
        • 2.R6g4#
      • 1...Bb8!
    • 1.Qb8?
      • threat
        • 2.Qxe5#
      • 1...Re2
        • 2.Sd3#
      • 1...Sg4
        • 2.R6xg4#
      • 1...Sd7
        • 2.R6g4#
      • 1...Bxb8!
    • 1.Qf8?
      • threat
        • 2.Qh6#
      • 1...Sxf3
        • 2.R3g4#
        • 2.R6g4#
      • 1...Rh2
        • 2.Sxd5#
      • 1...Sg4
        • 2.R6xg4#
      • 1...Sf7!
  • Keys
    • 1.R6g5!
      • threat
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(H);P_PINR(a)
      • Threat
        • QAB(H),XR(a)
      • Vars
        • S(e);N_GUARD::S(E)
        • S(g);N_GUARD::S(E),XP(d)
      • Refutation
        • S(e);XP(C)
    • Try
      • Q(H);P_PINS(e)
      • Threat
        • QAB1(H),XS(e)
      • Vars
        • R(a);N_GUARD::S(E)
        • S(g);N_GUARD::R1(G),XS(g)
        • S(g);N_GUARD::R1(G)
      • Refutation
        • B(h);
    • Try
      • Q(H);P_PINS(e)
      • Threat
        • QAB1(H),XS(e)
      • Vars
        • R(a);N_GUARD::S(E)
        • S(g);N_GUARD::R1(G),XS(g)
        • S(g);N_GUARD::R1(G)
      • Refutation
        • B(h);N_SPINS(e),XQ(H)
    • Try
      • Q(H);P_PINS(g)
      • Threat
        • QAB(H)
      • Vars
        • R(a);N_GUARD::S(E),XP(d)
        • S(e);N_GUARD::R1(G),XS(e)
      • Refutation
        • S(e);N_SPINS(g)
  • Actual
    • R(G);
    • Threat
      • R1(G)
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