MESON Chess Problem Database

Problem Display
PID: 273345 (1B2RRn1/KQ1Pr3/1p1r2p1/1N1nkP2/5p2/b4p2/8/1BN5 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Springaren, 1990

1B2RRn1/KQ1Pr3/1p1r2p1/1N1nkP2/5p2/b4p2/8/1BN5

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Rxe6#
    • 1...Bxc1
      • 2.Bxd6#
    • 1...Bb2
      • 2.Bxd6#
    • 1...Sc3
      • 2.Sd3#
    • 1...Se3
      • 2.Sd3#
      • 2.Qe4#
    • 1...Sb4
      • 2.Bxd6#
      • 2.Qe4#
    • 1...Sc7
      • 2.Qe4#
  • Tries
    • 1.Rxe7+?
      • 1...Sdxe7
        • 2.Sd3#
        • 2.Qe4#
      • 1...Sgxe7!
  • Keys
    • 1.d8S!
      • threat
        • 2.Sc6#
      • 1...gxf5
        • 2.Rxf5#
      • 1...Sc3
        • 2.Sd3#
      • 1...Se3
        • 2.Sd3#
      • 1...Sb4
        • 2.Bxd6#
      • 1...Sdf6
        • 2.Sf7#
      • 1...Sc7
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(i);OGATE::R1(I),XR(i)
    • B(a);N_GUARD,XS(B)::B(H),XR(g)
    • B(a);N_GUARD::B(H),XR(g)
    • S(d);::S(B)
    • S(d);N_SPINR(g),OGATE,P_SPINR(i)::QAR1(F)
  • Tries
    • Try
      • R(I);CHECK,XR(i)
      • Refutation
        • S(j);XR(I)
  • Actual
    • P(G);P_SPINQ(F)
    • Threat
      • S(G)
    • Vars
      • P(h);OGATE,XP(D)::R1(J),XP(h)
      • S(d);::S(B)
      • S(d);S_CUTB(a)::B(H),XR(g)
      • S(d);SBLOCK::S(G)
      • S(d);N_PINQ(F),N_SPINR(g),P_SPINR(i)::QAR1(F)
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