MESON Chess Problem Database

Problem Display
PID: 80023 (8/8/6K1/5p2/6Nk/5Q1b/8/8 w - - 0 1)

Ahlheim, Karl-Heinz

Stella Polaris, 1970

8/8/6K1/5p2/6Nk/5Q1b/8/8

#2

3 + 3

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qxh3#
      • 1...Bf1
        • 2.Qf4#
      • 1...Bg2
        • 2.Qf4#
      • 1...Bg4!
    • 1.Sh6?
      • threat
        • 2.Qf2#
      • 1...Bf1
        • 2.Sxf5#
      • 1...Bg2
        • 2.Sxf5#
      • 1...Bg4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qf2#
      • 1...Bf1
        • 2.Sxf5#
      • 1...Bg2
        • 2.Sxg2#
        • 2.Sxf5#
      • 1...Bg4
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(A),XB(a)
      • Vars
        • B(a);N_GUARD::QAR2(A)
      • Refutation
        • B(a);
    • Try
      • S(B);
      • Threat
        • QAB(A)
      • Vars
        • B(a);N_GUARD::S(B),XP(c)
      • Refutation
        • B(a);
  • Actual
    • S(B);
    • Threat
      • QAB(A)
    • Vars
      • B(a);N_GUARD::S(B),XP(c)
      • B(a);N_GUARD::S(B)
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