MESON Chess Problem Database

Problem Display
PID: 9917 (kb6/3p4/8/2P5/8/8/6K1/6QB w - - 0 1)

Mathiassen, Olaf

5th HM., Skakbladet TT, 1960

kb6/3p4/8/2P5/8/8/6K1/6QB

#2

4 + 3

4884 154 norske miniatyrproblemer 1974
2012 Miniature Chess Problems from Many Countries 1981
56 The Problemist 1981
3295 Einfuhrung in die Welt des Schachproblem 1984
145 StrateGems 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Kf1+?
      • 1...d5
        • 2.cxd5 ep#
      • 1...Ka7!
    • 1.Kf2+?
      • 1...Ka7
        • 2.Qa1#
      • 1...d5!
  • Keys
    • 1.Kh3+!
      • 1...Ka7
        • 2.Qa1#
      • 1...d5
        • 2.cxd5 ep#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);CHECK,S_FLIGHT
      • Vars
        • P(a);OGATE,P_SPINP(a)::B(B)+P(D),XP(a),EP
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • K(C);CHECK,P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR(A)
      • Refutation
        • P(a);P_SPINP(a)
  • Actual
    • K(C);CHECK,S_FLIGHT
    • Vars
      • K(b);P-FLIGHT::QAR(A)
      • P(a);OGATE,P_SPINP(a)::B(B)+P(D),XP(a),EP
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