MESON Chess Problem Database

Problem Display
PID: 108774 (7K/5P2/1N6/1Q6/P2n4/k1N1B2R/b2n1r2/1B6 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Szachy, 1948

7K/5P2/1N6/1Q6/P2n4/k1N1B2R/b2n1r2/1B6

#2

9 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.f8Q#
      • 2.f8B#
    • 1...Rg2
      • 2.f8Q#
      • 2.f8B#
    • 1...Rh2
      • 2.f8Q#
      • 2.f8B#
    • 1...S2b3
      • 2.Sc4#
    • 1...S2f3
      • 2.f8Q#
      • 2.f8B#
    • 1...Se2
      • 2.Bc5#
    • 1...S4f3
      • 2.Bc5#
      • 2.f8Q#
      • 2.f8B#
    • 1...Sf5
      • 2.Bc5#
  • Keys
    • 1.Sd1!
      • threat
        • 2.Qb2#
      • 1...Sxb1
        • 2.Bc1#
      • 1...Sxb5
        • 2.Bc5#
      • 1...Bb3
        • 2.Qc5#
      • 1...Sf1
        • 2.Bc1#
      • 1...S2b3
        • 2.Sc4#
      • 1...S2f3
        • 2.f8Q#
        • 2.f8B#
      • 1...Sc4
        • 2.Bc1#
      • 1...Se4
        • 2.Bc1#
      • 1...S4b3
        • 2.Bc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD::P=Q
    • R(c);N_GUARD,P_PINR(D)::P=Q
    • S(b);N_GUARD,S_CUTB(a)::S(G)
    • S(b);S_CUTR(c)::P=Q
    • S(e);OGATE::B(C)
  • Actual
    • S(B);
    • Threat
      • QAB1(F)
    • Vars
      • S(b);OGATE,XB(A)::R(D)+B(C),DCHECK
      • S(e);OGATE,XQ(F)::R(D)+B(C),DCHECK
      • B(a);SBLOCK::QAB(F)
      • S(b);OGATE::R(D)+B(C),DCHECK
      • S(b);N_GUARD,S_CUTB(a)::S(G)
      • S(b);S_CUTR(c)::P=Q
      • S(e);OGATE::B(C)
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