MESON Chess Problem Database

Problem Display
PID: 104869 (5n2/8/B7/3kP2R/3P4/5K2/8/6Q1 w - - 0 1)

St Maurice, Ephrem

La Presse, 1923

5n2/8/B7/3kP2R/3P4/5K2/8/6Q1

#2

6 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qc4#
      • 1...Kxd4
        • 2.Qc4#
      • 1...Ke6!
    • 1.Qg4?
      • 1...Se6
        • 2.Qe4#
      • 1...Sg6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sh7
        • 2.Qd7#
      • 1...Kc6!
  • Keys
    • 1.Qg7!
      • 1...Kxd4
        • 2.e6#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Bc4#
      • 1...Se6
        • 2.Qd7#
      • 1...Sg6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sh7
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(b);SBLOCK::QAB1(A)
        • S(b);N_GUARD::QAR2(A)
        • S(b);N_GUARD::QAR2(A),XS(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT,XP(C)::QAB(A)+P(D)
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::B(F)
      • S(b);N_GUARD::QAR2(A)
      • S(b);N_GUARD::QAR2(A),XS(b)
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