MESON Chess Problem Database

Problem Display
PID: 120028 (1n2B3/n4K2/8/2pkpQ2/4p3/P7/1P1NP3/8 w - - 0 1)

Pradignat, Emile Leonard

La Strategie, 1908

1n2B3/n4K2/8/2pkpQ2/4p3/P7/1P1NP3/8

#2

7 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qxe4#
    • 1...Sa6
      • 2.Qd7#
    • 1...Sc6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
    • 1...e3
      • 2.Qd3#
  • Tries
    • 1.Kf6?
      • threat
        • 2.Qxe5#
      • 1...Sd7+
        • 2.Qxd7#
      • 1...Kd4
        • 2.Qxe4#
      • 1...Kd6
        • 2.Qxe5#
      • 1...Sbc6
        • 2.Qd7#
      • 1...Sac6!
    • 1.Sb3?
      • threat
        • 2.Qe6#
      • 1...Kc4
        • 2.Qe6#
      • 1...e3
        • 2.Qd3#
      • 1...Kd6!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qe6#
      • 1...Kc4
        • 2.Qe6#
      • 1...Kd6
        • 2.Qxe5#
      • 1...exf3
        • 2.Qd3#
      • 1...e3
        • 2.Qd3#
      • 1...c4
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • K(c);N_SPINP(d),P-FLIGHT::QAR1(E),XP(a)
    • S(f);N_GUARD::QAR2(E)
    • S(f);N_GUARD::QAR2(E),XS(f)
    • P(a);OGATE::QAR2(E)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Threat
        • QAR1(E),XP(d)
      • Vars
        • S(f);CHECK,N_GUARD::QAR2(E),XS(f)
        • K(c);N_SPINP(d),P-FLIGHT::QAR1(E),XP(a)
        • K(c);N_SPINP(d),P-FLIGHT::QAB1(E),XP(d)
        • S(f);N_GUARD::QAR2(E)
      • Refutation
        • S(e);
    • Try
      • S(B);
      • Threat
        • QAB1(E)
      • Vars
        • K(c);N_SPINP(d),S_FLIGHT::QAB(E)
        • P(a);OGATE::QAR2(E)
      • Refutation
        • K(c);N_SPINP(d),P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAB1(E)
    • Vars
      • K(c);N_SPINP(d),S_FLIGHT::QAB(E)
      • K(c);N_SPINP(d),P-FLIGHT::QAB1(E),XP(d)
      • P(a);OGATE,XS(B)::QAR2(E)
      • P(a);OGATE::QAR2(E)
      • P(b);SBLOCK::QAR1(E),XP(d)
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