MESON Chess Problem Database

Problem Display
PID: 177833 (1B6/8/6pK/1N3PP1/1P3P2/4k3/2Q4N/8 w - - 0 1)

Ondar, Y

Sahs (Latvia), 1983

1B6/8/6pK/1N3PP1/1P3P2/4k3/2Q4N/8

#2

9 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sd4?
      • 1...gxf5
        • 2.Sxf5#
      • 1...Kxd4!
    • 1.Sc7?
      • 1...Kd4
        • 2.Ba7#
      • 1...Kxf4
        • 2.Sd5#
      • 1...gxf5!
    • 1.Qd2+?
      • 1...Ke4
        • 2.Sd6#
      • 1...Kxd2!
  • Keys
    • 1.Sd6!
      • 1...Kd4
        • 2.Qd2#
      • 1...Kxf4
        • 2.Sc4#
      • 1...gxf5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Vars
        • P(b);XP(F)::S(E),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
    • Try
      • S(E);
      • Vars
        • K(a);S_FLIGHT::B(I)
        • K(a);S_FLIGHT,XP(D)::B(I)+S(E),DCHECK
      • Refutation
        • P(b);XP(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::S(E)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • S(E);
    • Vars
      • K(a);S_FLIGHT::QAR2(A)
      • K(a);S_FLIGHT,XP(D)::B(I)+S(E)
      • P(b);XP(F)::S(E),XP(b)
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