MESON Chess Problem Database

Problem Display
PID: 121530 (8/8/1k6/8/8/5Q2/7B/4KB2 w - - 0 1)

Drnek, Josef

Nove parizske mody, 1905

8/8/1k6/8/8/5Q2/7B/4KB2

#2

4 + 1

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Bg1+?
      • 1...Ka5
        • 2.Qa3#
      • 1...Kc7!
    • 1.Qe2?
      • 1...Ka5
        • 2.Qb5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Ka7
        • 2.Qa6#
      • 1...Kb7
        • 2.Qa6#
      • 1...Kc5!
    • 1.Qc6+?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka7
        • 2.Qa6#
      • 1...Kxc6!
    • 1.Qa3?
      • 1...Kb7
        • 2.Qa6#
      • 1...Kc6!
    • 1.Qb3+?
      • 1...Ka5
        • 2.Bc7#
        • 2.Qb5#
      • 1...Kc6
        • 2.Qb5#
      • 1...Ka7
        • 2.Qb8#
      • 1...Kc5!
    • 1.Qf6+?
      • 1...Kc5
        • 2.Qd6#
      • 1...Ka7
        • 2.Qa6#
      • 1...Kb7
        • 2.Qa6#
      • 1...Ka5!
  • Keys
    • 1.Qd3!
      • 1...Ka5
        • 2.Qb5#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kc6
        • 2.Qb5#
      • 1...Ka7
        • 2.Qa6#
      • 1...Kb7
        • 2.Qa6#

Anticipated by 2175(0000), 49566(0000), 47351(1888), 181089(1904)

This anticipates 182229(1906), 182335(1906), 194004(1917), 195071(1918), 205689(1925), 174121(1926), 227459(1926), 227672(1926), 227673(1926), 227674(1926), 227676(1926), 77127(1948), 12251(1976), 196647(1999), 248693(2007)

FEATURES

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