MESON Chess Problem Database

Problem Display
PID: 98187 (1B2Q1b1/1p2N1rn/3rn2K/R2Pk3/3pN1P1/q1P1PP2/1b6/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Problem (Zagreb), 1954

1B2Q1b1/1p2N1rn/3rn2K/R2Pk3/3pN1P1/q1P1PP2/1b6/8

#2

11 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bxd6#
    • 1...Qa2
      • 2.Bxd6#
    • 1...Qb3
      • 2.Bxd6#
    • 1...Qxc3
      • 2.Bxd6#
    • 1...Qa4
      • 2.Bxd6#
    • 1...Qxa5
      • 2.Bxd6#
    • 1...Rg6+
      • 2.Sxg6#
    • 1...Rf7
      • 2.Sg6#
    • 1...Sf4+
      • 2.Sg6#
    • 1...Sc5+
      • 2.Bxd6#
    • 1...Seg5+
      • 2.Sg6#
    • 1...Sc7+
      • 2.Sg6#
    • 1...Sd8+
      • 2.Sg6#
    • 1...Sef8+
      • 2.Sg6#
    • 1...b6
      • 2.Sc6#
  • Tries
    • 1.cxd4+?
      • 1...Sxd4+
        • 2.Sg6#
      • 1...Bxd4!
    • 1.exd4+?
      • 1...Sxd4+
        • 2.Sg6#
      • 1...Kf4!
    • 1.f4+?
      • 1...Sxf4+
        • 2.Sg6#
      • 1...Kxe4!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qf5#
      • 1...Rxg6+
        • 2.Sxg6#
      • 1...Rf7
        • 2.Qxe6#
      • 1...Sf4
        • 2.exd4#
      • 1...Sc5
        • 2.Bxd6#
        • 2.Qxd6#
        • 2.f4#
      • 1...Seg5
        • 2.f4#
      • 1...Sc7
        • 2.f4#
      • 1...Sd8
        • 2.f4#
      • 1...Sef8
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_GUARD::B(J),XR(e)
    • Q(b);N_GUARD,XP(A)::B(J),XR(e)
    • Q(b);N_GUARD,XR(F)::B(J),XR(e)
    • R(h);CHECK,N_GUARD::S(I),XR(h)
    • R(h);N_GUARD::S(I)
    • S(f);CHECK::QAR(K)+S(I),DCHECK
    • S(f);CHECK,S_CUTQ(b)::B(J),XR(e)
    • S(f);CHECK,N_SPINR(e)::QAR(K)+S(I),DCHECK
    • P(g);N_GUARD::S(I)
  • Tries
    • Try
      • P(A);CHECK,XP(c)
      • Vars
        • S(f);CHECK,XP(A)::QAR(K)+S(I),DCHECK
      • Refutation
        • B(a);XP(A)
    • Try
      • P(B);CHECK,XP(c)
      • Vars
        • S(f);CHECK,XP(B)::QAR(K)+S(I),DCHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • S(f);CHECK,XP(C)::QAR(K)+S(I),DCHECK
      • Refutation
        • K(d);N_SPINR(e),P-FLIGHT,XS(D)
  • Actual
    • Q(K);
    • Threat
      • QAR1(K)
    • Vars
      • R(h);CHECK,XQ(K)::S(I),XR(h)
      • R(h);S_CUTB(j)::QAR1(K),XS(f)
      • S(f);N_GUARD,P_PINQ(K),SBLOCK::P(B),XP(c)
      • S(f);N_GUARD,P_PINQ(K)::P(C)
      • S(f);N_GUARD,N_SPINR(e),P_PINQ(K)::P(C)
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