MESON Chess Problem Database

Problem Display
PID: 53695 (4Nrr1/7p/qp2p3/p1p1nkpK/6R1/4p1B1/6Q1/1b6 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

2nd Prize, Magyar Sakkvilag, 1949

4Nrr1/7p/qp2p3/p1p1nkpK/6R1/4p1B1/6Q1/1b6

#2

5 + 13

45 Schach 1950

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Sd6#
    • 1...Rh8
      • 2.Rxg5#
    • 1...Ba2
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Sd3
      • 2.Qe4#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sc4
      • 2.Qf1#
      • 2.Qf3#
    • 1...Sxg4
      • 2.Qf3#
    • 1...Sc6
      • 2.Qf3#
    • 1...Sg6
      • 2.Rxg5#
    • 1...Sd7
      • 2.Qf3#
    • 1...Sf7
      • 2.Qf3#
  • Tries
    • 1.Qf1+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Qxf1!
    • 1.Qf2+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...exf2!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qxe5#
      • 1...Sxg4
        • 2.Sd6#
      • 1...Sd3
        • 2.Sd6#
      • 1...Sf3
        • 2.Sd6#
      • 1...Sc4
        • 2.Qxb1#
      • 1...Sc6
        • 2.Sd6#
      • 1...Sg6
        • 2.Sd6#
      • 1...Sd7
        • 2.Sd6#
      • 1...Sf7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 7
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(l);SBLOCK::S(E)
    • R(m);N_GUARD::R1(C),XP(g)
    • B(a);N_GUARD::QAB1(A)
    • B(a);N_GUARD::QAB1(A),XB(a)
    • S(e);S_CUTB(a)::QAB1(A)
    • S(e);N_GUARD::QAR2(A),XS(e)
    • S(e);N_GUARD,XR(C)::QAR2(A)
    • S(e);N_GUARD::QAR2(A)
    • S(e);S_CUTR(m)::R1(C),XP(g)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR2(A),XS(e)
      • Refutation
        • Q(h);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR2(A),XS(e)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XS(e)
    • Vars
      • S(e);XR(C)::S(E)
      • S(e);::S(E)
      • S(e);N_GUARD,S_CUTQ(h)::QAB(A),XB(a)
      • S(e);OGATE::QAR1(A)
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Developed and maintained by Brian Stephenson.
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