MESON Chess Problem Database

Problem Display
PID: 79830 (8/6K1/6p1/5p1B/6Nk/4Q3/8/8 w - - 0 1)

Ahlheim, Karl-Heinz

Themes-64, 1967

8/6K1/6p1/5p1B/6Nk/4Q3/8/8

#2

4 + 3

3713 Snap 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Sf2?
      • 1...Kxh5
        • 2.Qh6#
      • 1...gxh5
        • 2.Qf4#
      • 1...g5
        • 2.Qh3#
      • 1...f4!
    • 1.Qg3+?
      • 1...Kg5
        • 2.Sf6#
      • 1...Kxh5
        • 2.Sf6#
      • 1...Kxg3!
  • Keys
    • 1.Qf4!
      • 1...Kh3
        • 2.Qh2#
      • 1...Kxh5
        • 2.Sf6#
      • 1...fxg4
        • 2.Qxg4#
      • 1...gxh5
        • 2.Sf2#
      • 1...g5
        • 2.Qh2#

Anticipated by 28899(1871)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XB(C)::QAR1(A)
        • P(c);SBLOCK,XB(C)::QAR2(A)
        • P(c);SBLOCK::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR(A)+S(B)
        • K(a);P-FLIGHT,XB(C)::S(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);P-FLIGHT,XB(C)::S(B)
      • P(b);OGATE,P_SPINP(b),XS(B)::QAR1(A),XP(b)
      • P(c);SBLOCK,XB(C)::QAR(A)+S(B)
      • P(c);SBLOCK::QAR2(A)
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