MESON Chess Problem Database

Problem Display
PID: 170471 (8/5B2/8/2Q5/4P3/4N2K/4kB2/8 w - - 0 1)

Wermelinger, Charles

Basler Nachrichten, 1951

8/5B2/8/2Q5/4P3/4N2K/4kB2/8

#2

6 + 1

6490 yacpdb 2018
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kd2
      • 2.Qc2#
  • Tries
    • 1.Kg2?
      • threat
        • 2.Qc2#
      • 1...Kd2
        • 2.Qc2#
      • 1...Kd3!
    • 1.Kg3?
      • threat
        • 2.Qc2#
      • 1...Kd2
        • 2.Qc2#
      • 1...Kd3!
  • Keys
    • 1.Sf1!
      • 1...Kd1
        • 2.Bh5#
      • 1...Kxf1
        • 2.Bc4#
      • 1...Kd3
        • 2.Qc4#
      • 1...Kf3
        • 2.Qe3#

Anticipated by 121390(1908), 23345(1927), 22287(1934), 22386(1934)

This anticipates 176158(1954), 24220(1983), 211347(1986), 171300(1988), 23874(1996), 47813(1998), 165528(1998), 16167(2000), 26009(2001)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR1(E)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAR2(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAR2(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT::B(F)
      • K(a);S_FLIGHT,XS(B)::B(F)
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);S_FLIGHT::QAR1(E)
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