MESON Chess Problem Database

Problem Display
PID: 43493 (1b3R1N/1Q1p4/b3rPN1/3p1k1n/2B4P/4R2P/8/3K4 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Schach-Aktiv, 2002

1b3R1N/1Q1p4/b3rPN1/3p1k1n/2B4P/4R2P/8/3K4

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Qb1#
    • 1...Rd6
      • 2.Re5#
      • 2.Qb1#
    • 1...Rxf6
      • 2.Qb1#
      • 2.Qxd7#
    • 1...Be5
      • 2.Qb1#
  • Tries
    • 1.Bd3+?
      • 1...Re4
        • 2.Qxd7#
      • 1...Bxd3!
    • 1.Re5+?
      • 1...Bxe5
        • 2.Qb1#
      • 1...Rxe5!
    • 1.Qxd5+?
      • 1...Be5
        • 2.Qe4#
        • 2.Qd3#
      • 1...Re5!
  • Keys
    • 1.Qxd7!
      • threat
        • 2.Qxe6#
      • 1...Bc8
        • 2.Bd3#
      • 1...Be5
        • 2.Rxe5#
      • 1...Sf4
        • 2.Se7#
      • 1...Sg7
        • 2.fxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(e);N_GUARD::QAB(H)
    • B(g);S_CUTR(e)::QAB(H)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • R(e);P_SPINR(e),S_CUTB(d)::QAB(H),XP(f)
      • Refutation
        • B(d);XB(D)
    • Try
      • R(B);CHECK
      • Vars
        • B(g);XR(B)::QAB(H)
      • Refutation
        • R(e);XR(B)
    • Try
      • Q(H);CHECK,XP(a)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • Q(H);P_PINR(e),XP(f)
    • Threat
      • QAB1(H),XR(e)
    • Vars
      • B(d);N_GUARD::B(D)
      • B(g);N_GUARD::R1(B),XB(g)
      • S(c);SBLOCK::S(G)
      • S(c);OGATE::R(I)+P(F),XS(c)
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