MESON Chess Problem Database

Problem Display
PID: 17273 (1B1RR3/K7/Q1pPN1N1/3k4/1p2p1n1/p2nP2B/8/8 w - - 0 1)

Larsen, Karl Adolf Koefoed

De Problemist, 1929

1B1RR3/K7/Q1pPN1N1/3k4/1p2p1n1/p2nP2B/8/8

#2

10 + 7

35 L'Italia Scacchistica 1930
2048 Tuxens skakopgaver (Leif C Schmidt) 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Sef4#
      • 2.Sc7#
    • 1...Sde5
      • 2.Sgf4#
    • 1...Sge5
      • 2.Se7#
    • 1...c5
      • 2.Sc7#
  • Tries
    • 1.Kb7?
      • threat
        • 2.Qxc6#
      • 1...Sde5
        • 2.Sgf4#
      • 1...Sge5
        • 2.Se7#
      • 1...c5
        • 2.Sc7#
      • 1...Sc5+!
    • 1.Qb5+?
      • 1...Sc5
        • 2.Sef4#
        • 2.Sc7#
        • 2.Qxc5#
      • 1...c5
        • 2.Sc7#
      • 1...cxb5!
  • Keys
    • 1.Rc8!
      • threat
        • 2.Qxc6#
      • 1...Sc5
        • 2.Sef4#
      • 1...Sde5
        • 2.Sgf4#
      • 1...Sge5
        • 2.Se7#
      • 1...c5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,SBLOCK::S(F)
    • S(e);SBLOCK::S(F)
    • P(g);SBLOCK::S(E)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Threat
        • QAB1(C),XP(g)
      • Vars
        • S(b);N_GUARD,SBLOCK::S(F)
        • S(e);SBLOCK::S(F)
        • P(g);SBLOCK::S(E)
      • Refutation
        • S(b);CHECK
    • Try
      • Q(C);CHECK
      • Vars
        • P(g);P_SPINP(g)::S(E)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • R(I);
    • Threat
      • QAB1(C),XP(g)
    • Vars
      • S(b);N_GUARD,SBLOCK::S(E)
      • S(b);N_GUARD,SBLOCK::S(F)
      • S(e);SBLOCK::S(F)
      • P(g);SBLOCK::S(E)
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