MESON Chess Problem Database

Problem Display
PID: 7581 (7Q/P1p5/1R6/N2kn3/8/BP5b/K1N1R2b/1B1r4 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

2nd HM., Springaren, 1991

7Q/P1p5/1R6/N2kn3/8/BP5b/K1N1R2b/1B1r4

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Se3#
    • 1...Bg1
      • 2.Rxe5#
      • 2.Qxe5#
    • 1...Sd3
      • 2.Qd4#
    • 1...Sf3
      • 2.Se3#
    • 1...Sc4
      • 2.bxc4#
    • 1...Sg4
      • 2.Qg8#
    • 1...Sc6
      • 2.Rb5#
    • 1...Sg6
      • 2.Se3#
    • 1...Sd7
      • 2.Se3#
    • 1...Sf7
      • 2.Se3#
  • Tries
    • 1.Qa8+?
      • 1...Sc6
        • 2.Rb5#
        • 2.Qxc6#
      • 1...c6!
    • 1.Qf8?
      • threat
        • 2.Qc5#
      • 1...cxb6
        • 2.Qd6#
      • 1...c6
        • 2.Qd6#
      • 1...Sd3
        • 2.Qf3#
      • 1...Sd7
        • 2.Qf3#
      • 1...c5
        • 2.Rd6#
        • 2.Qxc5#
        • 2.Qd6#
      • 1...Bg1!
    • 1.Qg8+?
      • 1...Be6
        • 2.Qxe6#
      • 1...Sf7!
    • 1.a8Q+?
      • 1...Sc6
        • 2.Rb5#
        • 2.Qxc6#
      • 1...c6!
    • 1.a8B+?
      • 1...Sc6
        • 2.Bxc6#
        • 2.Rb5#
      • 1...c6!
  • Keys
    • 1.a8S!
      • threat
        • 2.Sxc7#
      • 1...cxb6
        • 2.Sc7#
      • 1...c6
        • 2.Sc7#
      • 1...Sd3
        • 2.Qd4#
      • 1...Sf3
        • 2.Se3#
      • 1...Sc4
        • 2.bxc4#
      • 1...Sg4
        • 2.Qg8#
      • 1...Sc6
        • 2.Rb5#
      • 1...Sg6
        • 2.Se3#
      • 1...Sd7
        • 2.Se3#
      • 1...Sf7
        • 2.Se3#
      • 1...c5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK::S(C)
    • S(e);OGATE::QAR1(J)
    • S(e);::S(C)
    • S(e);OGATE::P(F),XS(e)
    • S(e);N_GUARD,S_CUTB(c)::QAB(J)
    • S(e);S_CUTP(f)::R(H)
  • Tries
    • Try
      • Q(J);CHECK
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • P(f);N_GUARD,XR(H)::QAR1(J)
        • P(f);N_GUARD::QAR1(J)
        • S(e);N_GUARD::QAB(J)
      • Refutation
        • B(b);
    • Try
      • Q(J);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(J),XB(c)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • P(I);CHECK
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • P(I);CHECK
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • P(I);
    • Threat
      • S(I),XP(f)
    • Vars
      • P(f);XR(H)::S(I)
      • P(f);::S(I)
      • S(e);OGATE::QAR1(J)
      • S(e);::S(C)
      • S(e);OGATE::P(F),XS(e)
      • S(e);N_GUARD,S_CUTB(c)::QAB(J)
      • S(e);S_CUTP(f)::R(H)
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