MESON Chess Problem Database

Problem Display
PID: 56675 (8/4Q3/8/4p3/3Nk3/8/4NK2/8 w - - 0 1)

Legentil, Georges

Bulletin de la FFE, 1923

8/4Q3/8/4p3/3Nk3/8/4NK2/8

#2

4 + 2

5454 Near Snap 2007
3713 Snap 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Qc5?
      • 1...Kd3
        • 2.Qc2#
      • 1...exd4!
    • 1.Qc7?
      • 1...Kd3
        • 2.Qc2#
      • 1...Kd5
        • 2.Qc6#
      • 1...exd4!
    • 1.Qe8?
      • 1...Kd5
        • 2.Qc6#
      • 1...Kd3!
  • Keys
    • 1.Sf4!
      • 1...Kxd4
        • 2.Qb4#
      • 1...Kxf4
        • 2.Qh4#

Anticipated by 1974(1865), 207099(1866)

This anticipates 157070(1955), 10797(1968), 173964(2005), 164630(2014), 163268(2017)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(D);N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(D);
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
  • Actual
    • S(A);
    • Vars
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR2(D)
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(A)::QAR2(D)
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