MESON Chess Problem Database

Problem Display
PID: 174121 (7K/2B5/B1Q5/8/8/8/5k2/8 w - - 0 1)

Buchner, Richard

Arbeiter Schachzeitung, 1926

7K/2B5/B1Q5/8/8/8/5k2/8

#2

4 + 1

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Bb6+?
      • 1...Ke1
        • 2.Qc1#
      • 1...Kg3!
    • 1.Qf3+?
      • 1...Ke1
        • 2.Ba5#
        • 2.Qe2#
      • 1...Kg1
        • 2.Qf1#
      • 1...Kxf3!
    • 1.Qb5?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg1
        • 2.Qf1#
      • 1...Kg2
        • 2.Qf1#
      • 1...Kf3
        • 2.Qe2#
      • 1...Ke3!
    • 1.Qc1?
      • 1...Kg2
        • 2.Qf1#
      • 1...Kf3!
    • 1.Qc2+?
      • 1...Ke1
        • 2.Bg3#
        • 2.Ba5#
        • 2.Qe2#
      • 1...Kg1
        • 2.Qh2#
      • 1...Kf3
        • 2.Qe2#
      • 1...Ke3!
    • 1.Qf6+?
      • 1...Kg1
        • 2.Qf1#
      • 1...Kg2
        • 2.Qf1#
      • 1...Ke3
        • 2.Qf4#
      • 1...Ke1!
  • Keys
    • 1.Qc4!
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg1
        • 2.Qf1#
      • 1...Kg2
        • 2.Qf1#
      • 1...Ke3
        • 2.Qf4#
      • 1...Kf3
        • 2.Qe2#

Anticipated by 49566(0000), 2175(1858), 47351(1888), 181089(1904), 121530(1905), 182229(1906), 182335(1906), 194004(1917), 195071(1918), 205689(1925), 227459(1926), 227672(1926), 227673(1926), 227674(1926), 227676(1926)

This anticipates 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
      • B(C);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(B)
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(B)
        • K(a);OGATE,P-FLIGHT::QAB1(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);P-FLIGHT::QAB1(B)
      • K(a);S_FLIGHT::QAB1(B)
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