MESON Chess Problem Database

Problem Display
PID: 54721 (8/8/3ppnr1/N1pN2BR/ppPkqQnR/3P1P2/5P2/5bK1 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Lidova Demokracie, 1962

8/8/3ppnr1/N1pN2BR/ppPkqQnR/3P1P2/5P2/5bK1

#2

11 + 11

56 The Problemist 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd3
      • 2.Qd2#
    • 1...Se5
      • 2.Qe3#
    • 1...Sxh5
      • 2.Qxe4#
    • 1...Sd7
      • 2.Qxe4#
    • 1...Sh7
      • 2.Qxe4#
    • 1...Se8
      • 2.Qxe4#
    • 1...Sg8
      • 2.Qxe4#
  • Keys
    • 1.Qd2!
      • threat
        • 2.Sc6#
      • 1...Ke5
        • 2.Bxf6#
      • 1...Qxd3
        • 2.Be3#
      • 1...Qxd5
        • 2.Be3#
      • 1...Bxd3
        • 2.Qb2#
      • 1...Se5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • K(d);N_SPINQ(e),OGATEB,P-FLIGHT,XP(C)::QAR1(F)
    • S(f);N_GUARD,P_PINB(J),SBLOCK::QAB1(F)
    • S(j);N_GUARD,XR(K)::QAR1(F),XQ(e)
    • S(j);N_GUARD::QAR1(F),XQ(e)
  • Actual
    • Q(F);N_PINQ(e)
    • Threat
      • S(H)
    • Vars
      • K(d);S_FLIGHT::R(K)+B(J),DCHECK,XS(j)
      • Q(e);N_GUARD,P_SPINQ(e),P_SPINS(f),XP(C)::B(J)
      • Q(e);N_GUARD,P_SPINS(f),XS(I)::B(J)
      • B(a);P_SPINB(a),SBLOCK,XP(C)::QAB(F)
      • S(f);N_GUARD,P_PINB(J),P_SPINQ(e),SBLOCK::QAB1(F)
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