MESON Chess Problem Database

Problem Display
PID: 142990 (4N3/1ppB4/r7/p2kpR2/3N1b2/K1Qp3r/bB1PPp2/7q w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

3rd Prize, Deutsche Schachzeitung, 1971-1972

4N3/1ppB4/r7/p2kpR2/3N1b2/K1Qp3r/bB1PPp2/7q

#2

9 + 12

259 Thema Danicum 1976

SOLUTION

  • SOUND
  • Sets
    • 1...b6
      • 2.Bc6#
      • 2.Qc6#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Qd4#
      • 1...Ke4
        • 2.Qc4#
      • 1...Qe4
        • 2.Qc5#
      • 1...Be3
        • 2.Rxe5#
      • 1...c5!
    • 1.Sc6?
      • threat
        • 2.Qd4#
      • 1...Ke4
        • 2.Sf6#
      • 1...Qe4
        • 2.Se7#
      • 1...Be3
        • 2.Rxe5#
      • 1...dxe2!
    • 1.Be6+?
      • 1...Ke4
        • 2.Sf6#
      • 1...Rxe6!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qd4#
      • 1...Ke4
        • 2.Qxd3#
      • 1...Be3
        • 2.Rxe5#
      • 1...c5
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(E)
      • Vars
        • K(h);N_SPINP(i),S_FLIGHT::QAR2(E)
        • Q(a);SBLOCK::QAR1(E)
        • B(f);N_GUARD::R1(G),XP(i)
      • Refutation
        • P(l);
    • Try
      • S(F);
      • Threat
        • QAR1(E)
      • Vars
        • K(h);N_SPINP(i),S_FLIGHT::S(I)
        • Q(a);SBLOCK::S(F)
        • B(f);N_GUARD::R1(G),XP(i)
      • Refutation
        • P(d);P_PINQ(E),XP(C)
    • Try
      • B(H);CHECK
      • Vars
        • K(h);N_SPINP(i),S_FLIGHT::S(I)
      • Refutation
        • R(j);XB(H)
  • Actual
    • S(F);
    • Threat
      • QAR1(E)
    • Vars
      • K(h);N_SPINP(i),S_FLIGHT::QAB1(E),XP(d)
      • B(f);N_GUARD::R1(G),XP(i)
      • P(l);SBLOCK::QAR2(E),XP(d)
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