MESON Chess Problem Database

Problem Display
PID: 139135 (8/ppN3P1/5p2/1RB2P2/2k1nP2/K2n2r1/3p4/3N1Q2 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Madsen, Arthur Valdemar

3rd Comm., BCF 123. Ty., 1969-1970

8/ppN3P1/5p2/1RB2P2/2k1nP2/K2n2r1/3p4/3N1Q2

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.g8Q#
      • 2.g8B#
    • 1...Rf3
      • 2.g8Q#
      • 2.g8B#
    • 1...Rh3
      • 2.g8Q#
      • 2.g8B#
    • 1...Sc3
      • 2.Sb2#
    • 1...Sxc5
      • 2.Rb4#
  • Tries
    • 1.Se3+?
      • 1...Kc3
        • 2.Scd5#
        • 2.Rb3#
      • 1...Rxe3!
    • 1.Qe2?
      • threat
        • 2.Qxe4#
      • 1...Sxc5
        • 2.Rb4#
      • 1...Re3
        • 2.g8Q#
        • 2.g8B#
      • 1...Sf2
        • 2.Qe6#
      • 1...Sc3
        • 2.Sb2#
      • 1...Sd6
        • 2.Qe6#
      • 1...Sg5!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxe4#
      • 1...Rxf3
        • 2.g8Q#
        • 2.g8B#
      • 1...Sxf4
        • 2.Sb2#
      • 1...Sdxc5
        • 2.Rb4#
      • 1...Sexc5
        • 2.Qd5#
      • 1...Sc1
        • 2.Sb2#
      • 1...Se1
        • 2.Sb2#
      • 1...Sb2
        • 2.Sxb2#
      • 1...Sdf2
        • 2.Sb2#
      • 1...Sb4
        • 2.Sb2#
      • 1...Se5
        • 2.Sb2#
      • 1...Sef2
        • 2.Qd5#
      • 1...Sc3
        • 2.Se3#
      • 1...Sg5
        • 2.Qd5#
      • 1...Sd6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::P=Q
    • S(e);SBLOCK::S(A)
    • S(e);SBLOCK,XB(F)::R1(E)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • R(c);XS(A)
    • Try
      • Q(B);
      • Threat
        • QAR2(B),XS(e)
      • Vars
        • S(e);SBLOCK,XB(F)::R1(E)
        • R(c);N_GUARD::P=Q
        • S(e);OGATE::QAB(B)
        • S(e);SBLOCK::S(A)
      • Refutation
        • S(e);
  • Actual
    • Q(B);N_PINS(b)
    • Threat
      • QAR2(B),XS(e)
    • Vars
      • R(c);N_GUARD,XQ(B)::P=Q
      • S(b);N_GUARD,P_PINQ(B),XP(D)::S(A)
      • S(b);N_GUARD,P_PINQ(B),SBLOCK,XB(F)::R1(E)
      • S(e);OGATE,XB(F)::QAB1(B)
      • S(b);N_GUARD,P_PINQ(B)::S(A)
      • S(b);N_GUARD,P_PINQ(B)::S(A),XS(b)
      • S(e);OGATE::QAB1(B)
      • S(e);SBLOCK::S(A)
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