MESON Chess Problem Database

Problem Display
PID: 140910 (b2nQ3/3pp3/1K1B3p/1N1k1P2/1p1N2p1/bp1P4/8/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Hlas l'udu, 1979

b2nQ3/3pp3/1K1B3p/1N1k1P2/1p1N2p1/bp1P4/8/8

#2

7 + 10

15148 Sadier Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Se6
      • 2.Qxa8#
    • 1...Sf7
      • 2.Qxa8#
    • 1...exd6
      • 2.Qe4#
    • 1...e5
      • 2.Qxe5#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Se3#
      • 1...Bc1
        • 2.Sxb4#
      • 1...bxc2!
    • 1.Se2?
      • threat
        • 2.Sf4#
      • 1...Se6
        • 2.Qxa8#
      • 1...e5
        • 2.Qxe5#
      • 1...Bc1!
    • 1.Se6?
      • threat
        • 2.Sf4#
        • 2.Sec7#
      • 1...Sxe6
        • 2.Qxa8#
      • 1...Bc1
        • 2.Sec7#
      • 1...dxe6!
    • 1.Qxd7?
      • threat
        • 2.Bh2#
        • 2.Bg3#
        • 2.Bf4#
        • 2.Bc7#
        • 2.Bb8#
      • 1...exd6
        • 2.Qxd6#
      • 1...Sb7
        • 2.Qc6#
        • 2.Qe6#
      • 1...Sf7
        • 2.Qe6#
      • 1...g3
        • 2.Bxg3#
        • 2.Bf4#
        • 2.Bc7#
        • 2.Bb8#
      • 1...e5
        • 2.Bxb4#
        • 2.Bc5#
        • 2.Bc7#
        • 2.Be7#
        • 2.Bb8#
        • 2.Bf8#
      • 1...Bc6!
    • 1.Qxe7?
      • threat
        • 2.Qe4#
        • 2.Qe5#
      • 1...Sc6
        • 2.Qe4#
        • 2.Qf7#
      • 1...Sf7
        • 2.Qe4#
        • 2.Qxf7#
      • 1...Se6!
    • 1.Qg8+?
      • 1...Se6
        • 2.Qxa8#
      • 1...Sf7
        • 2.Qxa8#
      • 1...e6!
    • 1.Qh8?
      • threat
        • 2.Qe5#
      • 1...exd6
        • 2.Sc7#
      • 1...Sf7
        • 2.Qxa8#
      • 1...e5
        • 2.Qxe5#
      • 1...Sc6!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qh1#
      • 1...exd6
        • 2.f6#
      • 1...g3
        • 2.Qf3#
      • 1...e5
        • 2.fxe5 ep#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(j);OGATE::QAB(G),XB(i)
    • P(h);OGATE,XB(F)::QAB1(G)
    • P(h);OGATE::QAR1(G),XP(h)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • B(a);N_GUARD::S(B),XP(c)
      • Refutation
        • P(b);XS(B)
    • Try
      • S(B);
      • Threat
        • S(B)
      • Vars
        • S(j);OGATE::QAB(G),XB(i)
        • P(h);OGATE::QAR1(G),XP(h)
      • Refutation
        • B(a);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(j);OGATE,XS(B)::QAB(G),XB(i)
        • B(a);::S(B)
      • Refutation
        • P(g);XS(B)
    • Try
      • Q(G);XP(g)
      • Threat
        • DUALS(5)
      • Vars
        • P(h);OGATE,P_SPINP(h),XB(F)::QAR1(G),XP(h)
        • S(j);N_GUARD::QAB1(G)
      • Refutation
        • B(i);
    • Try
      • Q(G);XP(h)
      • Threat
        • DUALS(2)
      • Refutation
        • S(j);
    • Try
      • Q(G);CHECK
      • Vars
        • S(j);OGATE,P_SPINS(j)::QAB(G),XB(i)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • P(h);SBLOCK,XB(F)::S(C)
        • S(j);OGATE::QAB(G),XB(i)
        • P(h);::QAR1(G),XP(h)
      • Refutation
        • S(j);
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • P(h);N_GUARD,XB(F)::QAR(G)+P(D)
      • P(d);OGATE::QAB(G)
      • P(h);OGATE::QAR(G)+P(D),XP(h),EP
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