MESON Chess Problem Database

Problem Display
PID: 248693 (7Q/8/K7/3k4/8/B7/2B5/8 w - - 0 1)

Vlasenko, Nikolai Fillipovich

Uralski Problemist, 2007

7Q/8/K7/3k4/8/B7/2B5/8

#2

4 + 1

5454 Near Snap 2021
3713 Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bb3+?
      • 1...Kc6
        • 2.Qc8#
      • 1...Ke4!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kc6
        • 2.Ba4#
        • 2.Qd6#
      • 1...Kxe5!
    • 1.Qh5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kd4
        • 2.Qc5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Kc6!
    • 1.Qc8?
      • 1...Kd4
        • 2.Qc5#
      • 1...Ke5!
    • 1.Qd8+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Ke5
        • 2.Qd6#
      • 1...Kc6
        • 2.Ba4#
        • 2.Be4#
        • 2.Qd6#
      • 1...Ke6!
  • Keys
    • 1.Qf8!
      • 1...Kc4
        • 2.Qc5#
      • 1...Kd4
        • 2.Qc5#
      • 1...Ke5
        • 2.Qd6#
      • 1...Kc6
        • 2.Qd6#
      • 1...Ke6
        • 2.Qf5#

Anticipated by 2175(0000), 49566(0000), 47351(1888), 181089(1904), 121530(1905), 182229(1906), 182335(1906), 194004(1917), 195071(1918), 205689(1925), 227676(1926), 227673(1926), 227672(1926), 227459(1926), 227674(1926), 174121(1926), 77127(1948), 10704(1967), 11832(1972), 12251(1976), 196647(1999)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);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);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
    • 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
  • 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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