MESON Chess Problem Database

Problem Display
PID: 227676 (Q7/8/8/8/3k4/6B1/8/2K2B2 w - - 0 1)

Wortmann, H

Arbeiter Shachzeitung (Chemnitz), 1926

Q7/8/8/8/3k4/6B1/8/2K2B2

#2

4 + 1

5454 Near Snap 2020
3713 Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Bf2+?
      • 1...Kc3
        • 2.Qa3#
      • 1...Ke5!
    • 1.Qd5+?
      • 1...Kc3
        • 2.Be1#
        • 2.Qc4#
      • 1...Ke3
        • 2.Qd3#
      • 1...Kxd5!
    • 1.Qa3?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kd5!
    • 1.Qa4+?
      • 1...Kc3
        • 2.Be1#
        • 2.Be5#
        • 2.Qc4#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kc5!
    • 1.Qd8+?
      • 1...Ke3
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kc3!
  • Keys
    • 1.Qa6!
      • 1...Kc3
        • 2.Qc4#
      • 1...Ke3
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kd5
        • 2.Qc4#

Anticipated by 2175(0000), 49566(0000), 47351(1888), 181089(1904), 121530(1905), 182229(1906), 182335(1906), 194004(1917), 195071(1918), 205689(1925), 227459(1926), 227672(1926), 227673(1926), 227674(1926)

This anticipates 174121(1926), 77127(1948), 10704(1967), 11832(1972), 12251(1976), 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);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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