MESON Chess Problem Database

Problem Display
PID: 239984 (n2R4/4p1N1/2p1p1qr/K1k5/1pN1n3/1P3B2/1Q5B/b7 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Parallele 50, 1951

n2R4/4p1N1/2p1p1qr/K1k5/1pN1n3/1P3B2/1Q5B/b7

#2

8 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Qf2#
    • 1...Sg3
      • 2.Bg1#
    • 1...Sg5
      • 2.Bg1#
    • 1...Sf6
      • 2.Sxe6#
  • Tries
    • 1.Sb6?
      • threat
        • 2.Sa4#
      • 1...Sc3
        • 2.Qf2#
      • 1...Sxb6!
    • 1.Bg1+?
      • 1...Sf2
        • 2.Bxf2#
      • 1...Qxg1!
    • 1.Qf2+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sxf2!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sd3#
      • 1...Sd2
        • 2.Sd7#
      • 1...Sf2
        • 2.Sd7#
      • 1...Sc3
        • 2.Qf2#
      • 1...Sg3
        • 2.Bg1#
      • 1...Sg5
        • 2.Sd7#
        • 2.Bg1#
      • 1...Sd6
        • 2.Sd7#
      • 1...Sf6
        • 2.Sxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD,S_CUTB(a)::QAB(A)
    • S(c);N_GUARD,S_CUTQ(g)::B(B)
    • S(c);S_CUTQ(g)::S(G),XP(f)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • S(c);N_GUARD,S_CUTB(a)::QAB(A)
      • Refutation
        • S(j);XS(E)
    • Try
      • B(B);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(B),XS(c)
      • Refutation
        • Q(g);XB(B)
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB1(A),XB(a)
      • Refutation
        • S(c);XQ(A)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • S(c);::S(E)
      • S(c);N_GUARD,S_CUTB(a)::QAB(A)
      • S(c);N_GUARD,S_CUTQ(g)::B(B)
      • S(c);S_CUTQ(g)::S(G),XP(f)
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