MESON Chess Problem Database

Problem Display
PID: 265308 (8/8/Bn6/3pNq2/2n1pp1b/p1Q1BN1R/3Pk1r1/2K2b2 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

The Problemist, 1994

8/8/Bn6/3pNq2/2n1pp1b/p1Q1BN1R/3Pk1r1/2K2b2

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Sd4#
    • 1...fxe3
      • 2.Qxe3#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qd1#
      • 1...fxe3
        • 2.d4#
      • 1...Qxe5!
    • 1.Qb3?
      • threat
        • 2.Qd1#
      • 1...fxe3
        • 2.Qxe3#
      • 1...Qxe5!
  • Keys
    • 1.d4!
      • threat
        • 2.Qd2#
      • 1...fxe3
        • 2.Qc2#
      • 1...exd4 ep
        • 2.Sd4#
      • 1...Be1
        • 2.Qxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(h);SBLOCK::S(E)
    • P(g);OGATE,XB(D)::QAR1(C),XP(g)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(g);SBLOCK,XB(D)::QAR(C)+P(B)
      • Refutation
        • Q(j);XS(G)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(g);OGATE,XB(D)::QAR1(C),XP(g)
      • Refutation
        • Q(j);XS(G)
  • Actual
    • P(B);
    • Threat
      • QAR1(C)
    • Vars
      • P(g);SBLOCK,XB(D)::QAR2(C)
      • P(f);EP,N_SPINS(e),XP(B)::S(E)
      • B(h);N_GUARD::QAR1(C),XB(h)
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