MESON Chess Problem Database

Problem Display
PID: 179011 (5B1b/q5NP/4rk2/r4nNQ/p1nPp1Rp/8/8/4K3 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

3rd Prize, Magasinet, 1947

5B1b/q5NP/4rk2/r4nNQ/p1nPp1Rp/8/8/4K3

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Qf7#
    • 1...Qb6
      • 2.Qf7#
    • 1...Qb8
      • 2.Qf7#
    • 1...Qa6
      • 2.Qf7#
    • 1...Qf7
      • 2.Qxf7#
    • 1...Qa8
      • 2.Qf7#
    • 1...Ra6
      • 2.Sxe4#
      • 2.Se8#
    • 1...Rb6
      • 2.Sxe4#
      • 2.Se8#
    • 1...Rc6
      • 2.Sxe4#
      • 2.Se8#
    • 1...Rd6
      • 2.Sxe4#
      • 2.Se8#
    • 1...Re8
      • 2.Sxe8#
    • 1...Se5
      • 2.Sxe4#
    • 1...Se3
      • 2.Qh6#
    • 1...Sg3
      • 2.Qh6#
    • 1...Sd6
      • 2.Qh6#
    • 1...Sh6
      • 2.Qxh6#
    • 1...Se7
      • 2.Qf7#
  • Keys
    • 1.Sf7!
      • threat
        • 2.Qg6#
      • 1...Qxf7
        • 2.Qg5#
      • 1...Se5
        • 2.Qxf5#
      • 1...Se7
        • 2.Se8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • Q(i);N_GUARD::QAR1(E)
    • Q(i);N_GUARD::QAR1(E),XQ(i)
    • R(g);N_GUARD::S(F),XR(g)
    • S(b);S_CUTR(g)::S(D),XP(c)
    • S(f);N_GUARD::QAR2(E)
    • S(f);N_GUARD::QAR2(E),XS(f)
    • S(f);S_CUTQ(i)::QAR1(E)
  • Actual
    • S(D);
    • Threat
      • QAR1(E)
    • Vars
      • Q(i);SBLOCK,XS(D)::QAB1(E)
      • S(b);S_CUTR(e)::QAR1(E),XS(f)
      • S(f);S_CUTR(g)::S(F)
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