MESON Chess Problem Database

Problem Display
PID: 268497 (1bb5/6BB/8/2ppq3/2pkn2R/5PQ1/r2PP2K/N2R4 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Die Schwalbe, 1975

1bb5/6BB/8/2ppq3/2pkn2R/5PQ1/r2PP2K/N2R4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Sxc2#
    • 1...Ra3
      • 2.Sc2#
    • 1...Ra4
      • 2.Sc2#
    • 1...Ra5
      • 2.Sc2#
    • 1...Ra6
      • 2.Sc2#
    • 1...Ra7
      • 2.Sc2#
    • 1...Ra8
      • 2.Sc2#
    • 1...Ba7
      • 2.Bxe5#
      • 2.Qxe5#
  • Keys
    • 1.f4!
      • threat
        • 2.Qe3#
      • 1...Rxd2
        • 2.Sc2#
      • 1...Sxd2
        • 2.f5#
      • 1...Sxg3
        • 2.e3#
      • 1...c3
        • 2.Qd3#
      • 1...Ra3
        • 2.Sc2#
      • 1...Sf6
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::S(A),XR(a)
    • R(a);N_GUARD::S(A)
  • Actual
    • P(F);N_PINS(d),N_SPINQ(G)
    • Threat
      • QAB1(G)
    • Vars
      • R(a);N_GUARD,P_PINP(D),P_SPINR(a),XP(C)::S(A)
      • S(d);P_SPINS(d),XP(C)::R(H)+P(F)
      • S(d);XQ(G)::P(D)
      • P(b);N_GUARD::QAR1(G)
      • R(a);N_GUARD::S(A)
      • S(d);N_GUARD,N_SPINQ(g)::QAB1(G)
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