MESON Chess Problem Database

Problem Display
PID: 120940 (4B3/8/8/1K6/4k3/8/1Q6/B7 w - - 0 1)

Nix, John Gilbert

Chess Journal, 1877

4B3/8/8/1K6/4k3/8/1Q6/B7

#2

4 + 1

6490 yacpdb 2009
5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qe5#
  • Tries
    • 1.Qf2?
      • 1...Kd3
        • 2.Bg6#
      • 1...Kd5!
  • Keys
    • 1.Bh5!
      • 1...Kd3
        • 2.Qe2#
      • 1...Ke3
        • 2.Qd4#
      • 1...Kf4
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
      • 1...Kf5
        • 2.Qe5#

Anticipated by 2392(0000)

This anticipates 214368(1878), 9327(1880), 222385(1884), 222932(1885), 158307(1906-1907), 189438(1911), 189685(1912), 178322(1928), 96980(1943), 76834(1947), 103960(1993)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(D);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT::QAB1(B)
      • K(a);S_FLIGHT::QAR1(B)
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