MESON Chess Problem Database

Problem Display
PID: 47351 (6Q1/7B/8/8/3k4/B7/8/4K3 w - - 0 1)

Drtina, Jan

Zlata Praha, 1888

6Q1/7B/8/8/3k4/B7/8/4K3

#2

4 + 1

4883 Still More Fun with Chess Miniatures 2002
5454 Near Snap 2008
3713 Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Bb2+?
      • 1...Ke3
        • 2.Qg3#
      • 1...Kc5!
    • 1.Qd5+?
      • 1...Kc3
        • 2.Qd3#
      • 1...Ke3
        • 2.Bc1#
        • 2.Qe4#
      • 1...Kxd5!
    • 1.Qg3?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd5!
    • 1.Qg4+?
      • 1...Kc3
        • 2.Qb4#
      • 1...Ke3
        • 2.Bc1#
        • 2.Bc5#
        • 2.Qe4#
      • 1...Kd5
        • 2.Qe4#
      • 1...Ke5!
    • 1.Qd8+?
      • 1...Kc3
        • 2.Qd3#
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke5
        • 2.Qd6#
      • 1...Ke3!
  • Keys
    • 1.Qg6!
      • 1...Kc3
        • 2.Qd3#
      • 1...Ke3
        • 2.Qe4#
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd5
        • 2.Qe4#
      • 1...Ke5
        • 2.Qd6#

Anticipated by 49566(0000), 2175(1858)

This anticipates 181089(1904), 121530(1905), 182335(1906), 182229(1906), 194004(1917), 195071(1918), 205689(1925), 174121(1926), 227459(1926), 227672(1926), 227673(1926), 227674(1926), 227676(1926), 77127(1948), 10704(1967), 11832(1972), 196647(1999), 248693(2007)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(D)
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(D)
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(D)
        • K(a);OGATE,P-FLIGHT::QAB1(D)
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);P-FLIGHT::QAB1(D)
      • K(a);S_FLIGHT::QAB1(D)
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