MESON Chess Problem Database

Problem Display
PID: 4734 (4K3/4Q3/1NP5/1k6/8/8/2P5/4B3 w - - 0 1)

Weiss, Charles H

Nationaltidende, 1889

4K3/4Q3/1NP5/1k6/8/8/2P5/4B3

#2

6 + 1

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb4+?
      • 1...Ka6
        • 2.Qa5#
      • 1...Kxc6!
    • 1.Qc5+?
      • 1...Ka6
        • 2.Qa5#
      • 1...Kxc5!
  • Keys
    • 1.Sa4!
      • 1...Kxa4
        • 2.Qb4#
      • 1...Kc4
        • 2.Qc5#
      • 1...Ka6
        • 2.Qb7#
      • 1...Kxc6
        • 2.Qd7#

This anticipates 176153(1953), 78945(1960)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(a);P-FLIGHT,XQ(E)
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT,XS(C)::QAR1(E)
      • K(a);S_FLIGHT::QAR1(E)
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);OGATEB,S_FLIGHT,XP(D)::QAB1(E)
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