MESON Chess Problem Database

Problem Display
PID: 170137 (8/7B/1ppp4/8/2k2K2/Q1N1P3/8/8 w - - 0 1)

Kubli, Eugen

Tages-Anzeiger, 1981

8/7B/1ppp4/8/2k2K2/Q1N1P3/8/8

#2

5 + 4

16895 Schweizer Schachkompositionen (1976-1986) (Henneberger) 1989
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sa2?
      • 1...Kb5
        • 2.Bd3#
      • 1...Kd5
        • 2.Bg8#
      • 1...c5
        • 2.Qd3#
      • 1...d5
        • 2.Bd3#
        • 2.Qb4#
      • 1...b5!
    • 1.Qb3+?
      • 1...Kc5
        • 2.Sa4#
        • 2.Se4#
      • 1...Kxb3!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Qd4#
      • 1...Kxc3!
  • Keys
    • 1.Sd5!
      • 1...Kb5
        • 2.Bd3#
      • 1...Kxd5
        • 2.Bg8#
      • 1...cxd5
        • 2.Bd3#
      • 1...b5
        • 2.Sb6#
      • 1...c5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::B(E)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT::B(E)
      • K(a);OGATEB,S_FLIGHT,XS(B)::B(E)
      • P(c);SBLOCK,XS(B)::B(E)
      • P(b);SBLOCK::S(B)
      • P(c);SBLOCK::QAB1(A)
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