MESON Chess Problem Database

Problem Display
PID: 154879 (K2Bb1r1/1B1P1PP1/NRN1k3/5r1P/1p3pQ1/3n4/8/8 w - - 0 1)

Lazard, Frederic

3rd Prize, Western Daily Mercury, 1905-1906

K2Bb1r1/1B1P1PP1/NRN1k3/5r1P/1p3pQ1/3n4/8/8

#2

11 + 7

119 Tidskrift for Schack 1909

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf7
      • 2.Qg6#
  • Tries
    • 1.Sd4+?
      • 1...Ke5
        • 2.Sf3#
      • 1...Kxf7
        • 2.Qg6#
      • 1...Kxd7!
    • 1.Scb8+?
      • 1...Kxf7
        • 2.Qg6#
      • 1...Ke5!
    • 1.Qxf5+?
      • 1...Kd6
        • 2.Scxb4#
        • 2.Sd4#
        • 2.Sa5#
        • 2.Se5#
        • 2.Sa7#
        • 2.Se7#
        • 2.Scb8#
        • 2.Bc7#
        • 2.Be7#
      • 1...Kxf5!
  • Keys
    • 1.Bf6!
      • threat
        • 2.Se5#
      • 1...Bxd7+
        • 2.Sd8#
      • 1...Bxf7+
        • 2.Scb8#
      • 1...Kd5
        • 2.Sa5#
      • 1...Kd6
        • 2.Se5#
        • 2.Scb8#
      • 1...Kxf6
        • 2.Qg6#
      • 1...Kxd7
        • 2.Scb8#
      • 1...Kxf7
        • 2.Sd8#
      • 1...Se5
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINR(d),S_FLIGHT,XP(H)::QAB1(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(e);N_SPINR(d),P-FLIGHT::S(E)
        • K(e);N_SPINR(d),S_FLIGHT,XP(H)::QAB1(A)
      • Refutation
        • K(e);S_FLIGHT,XP(G)
    • Try
      • S(E);CHECK
      • Vars
        • K(e);N_SPINR(d),S_FLIGHT,XP(H)::QAB1(A)
      • Refutation
        • K(e);N_SPINR(d),P-FLIGHT
    • Try
      • Q(A);CHECK,XR(d)
      • Refutation
        • K(e);S_FLIGHT,XQ(A)
  • Actual
    • B(K);
    • Threat
      • R(D)+S(E)
    • Vars
      • B(f);CHECK,SBLOCK,XP(G)::R(D)+S(E),DCHECK
      • B(f);CHECK,SBLOCK,XP(H)::R(D)+S(E)
      • K(e);N_SPINR(d),S_FLIGHT::B(F)+S(E)
      • K(e);N_SPINR(d),OGATEB,P-FLIGHT,XB(K)::QAR1(A)
      • K(e);S_FLIGHT,XP(G)::S(E)
      • K(e);N_SPINR(d),S_FLIGHT,XP(H)::S(E)
      • S(a);::R(D)+S(E),XS(a)
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