MESON Chess Problem Database

Problem Display
PID: 107897 (8/8/3N4/1p1kp3/1K1N4/8/3Q4/8 w - - 0 1)

Chatillon, Octave H

La Presse, 1897

8/8/3N4/1p1kp3/1K1N4/8/3Q4/8

#2

4 + 3

6490 yacpdb 2009
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.S6xb5?
      • 1...Ke4
        • 2.Sc3#
      • 1...e4
        • 2.Qg5#
      • 1...exd4!
    • 1.Qa2+?
      • 1...Kxd4
        • 2.Qd2#
      • 1...Kxd6!
  • Keys
    • 1.Qg5!
      • 1...Kxd4
        • 2.Qd2#
      • 1...Kxd6
        • 2.Qd8#

Anticipated by 223095(1885)

This anticipates 255115(1932), 77518(1984)

FEATURES

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