MESON Chess Problem Database

Problem Display
PID: 238910 (1R6/6Rn/KQ4rr/6kp/4P1pp/3N3P/8/8 w - - 0 1)

Petite, Efren

Arbejder-Skak, 1959

1R6/6Rn/KQ4rr/6kp/4P1pp/3N3P/8/8

#2

7 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Qe3#
  • Tries
    • 1.Rc8?
      • threat
        • 2.Rc5#
      • 1...Sf6
        • 2.Qe3#
      • 1...gxh3!
    • 1.Rd8?
      • threat
        • 2.Rd5#
      • 1...Sf6
        • 2.Qe3#
      • 1...gxh3!
    • 1.Qc6?
      • threat
        • 2.Rb5#
      • 1...Sf6
        • 2.Qc1#
      • 1...gxh3!
    • 1.Qd6?
      • threat
        • 2.Rb5#
      • 1...Sf6
        • 2.Qf4#
        • 2.Qe5#
      • 1...gxh3!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Rb5#
      • 1...Sf6
        • 2.Qf5#
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • S(g);N_PINQ(E),SBLOCK::QAB(E)
  • Tries
    • Try
      • R(G);
      • Threat
        • R(G)
      • Vars
        • S(g);N_PINQ(E),SBLOCK::QAB(E)
      • Refutation
        • P(a);XP(B)
    • Try
      • R(G);
      • Threat
        • R(G)
      • Vars
        • S(g);N_PINQ(E),SBLOCK::QAB(E)
      • Refutation
        • P(a);XP(B)
    • Try
      • Q(E);
      • Threat
        • R(G)
      • Vars
        • S(g);N_PINQ(E),SBLOCK::QAB(E)
      • Refutation
        • P(a);XP(B)
    • Try
      • Q(E);
      • Threat
        • R(G)
      • Refutation
        • P(a);XP(B)
  • Actual
    • Q(E);
    • Threat
      • R(G)
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