MESON Chess Problem Database

Problem Display
PID: 227459 (6Q1/8/1B2K3/8/B7/3k4/8/8 w - - 0 1)

Roscher, Willy

Der Hammer, 1926

6Q1/8/1B2K3/8/B7/3k4/8/8

#2

4 + 1

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qg3+?
      • 1...Kd2
        • 2.Qe3#
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Bc2#
        • 2.Bc6#
        • 2.Qe3#
      • 1...Ke2!
    • 1.Qg4?
      • 1...Kc3
        • 2.Qd4#
      • 1...Kd2!
    • 1.Qd8+?
      • 1...Ke2
        • 2.Qd1#
      • 1...Kc3
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke4!
  • Keys
    • 1.Qg1!
      • 1...Kd2
        • 2.Qe3#
      • 1...Ke2
        • 2.Qd1#
      • 1...Kc3
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke4
        • 2.Qe3#

Anticipated by 2175(0000), 49566(0000), 47351(1888), 181089(1904), 121530(1905), 182335(1906), 182229(1906), 194004(1917), 195071(1918), 205689(1925), 227672(1926)

This anticipates 174121(1926), 227673(1926), 227674(1926), 227676(1926), 77127(1948), 10704(1967), 11832(1972), 12251(1976), 196647(1999), 248693(2007)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • 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);
      • 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)
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);P-FLIGHT::QAB1(D)
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);S_FLIGHT::QAR1(D)
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Developed and maintained by Brian Stephenson.
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