MESON Chess Problem Database

Problem Display
PID: 184881 (3K4/7B/7P/4k3/8/1Q6/8/2B5 w - - 0 1)

Westberg, CE

Tidskrift for Schack, 1908

3K4/7B/7P/4k3/8/1Q6/8/2B5

#2

5 + 1

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Kd7?
      • 1...Kf6
        • 2.Qe6#
      • 1...Kd4!
    • 1.Qc4?
      • 1...Kd6
        • 2.Bf4#
      • 1...Kf6!
    • 1.Qd5+?
      • 1...Kf6
        • 2.Bb2#
        • 2.Bg5#
        • 2.Qf5#
      • 1...Kxd5!
    • 1.Qd3?
      • 1...Kf6
        • 2.Qf5#
      • 1...Ke6!
  • Keys
    • 1.Bg8!
      • 1...Kd4
        • 2.Qe3#
      • 1...Ke4
        • 2.Qd5#
      • 1...Kf5
        • 2.Qe6#
      • 1...Kd6
        • 2.Qd5#
      • 1...Kf6
        • 2.Qe6#

Anticipated by 2392(0000), 214368(1878), 9327(1880), 222385(1884), 222932(1885), 158307(1906-1907)

This anticipates 189438(1911), 189685(1912), 178322(1928), 96980(1943), 76834(1947), 103960(1993), 202752(2016)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-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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