MESON Chess Problem Database

Problem Display
PID: 235298 (7K/3Q1p2/3NP3/2P1k1n1/2pnP3/4P3/2q2R2/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Revista Romana de Sah, 1948

7K/3Q1p2/3NP3/2P1k1n1/2pnP3/4P3/2q2R2/8

#2

8 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Sxc4#
    • 1...Se2
      • 2.Rf5#
    • 1...Sb3
      • 2.Rf5#
    • 1...Sb5
      • 2.Rf5#
    • 1...Sf5
      • 2.Rxf5#
    • 1...Sc6
      • 2.Rf5#
    • 1...Sdxe6
      • 2.Rf5#
    • 1...Sxe4
      • 2.Sxf7#
    • 1...fxe6
      • 2.Qg7#
  • Tries
    • 1.Sxc4+?
      • 1...Kxe4
        • 2.Qxd4#
      • 1...Qxc4!
    • 1.Sxf7+?
      • 1...Kxe4
        • 2.Qxd4#
      • 1...Sxf7+!
  • Keys
    • 1.Se8!
      • threat
        • 2.Qd5#
      • 1...Kxe4
        • 2.Qxd4#
      • 1...Qxe4
        • 2.Qd6#
      • 1...Sxe4
        • 2.exd4#
      • 1...fxe6
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD,SBLOCK,XP(C)::S(E),XP(b)
    • S(c);N_GUARD::R1(A)
    • S(c);N_GUARD::R1(A),XS(c)
    • S(c);N_GUARD,XP(F)::R1(A)
    • S(e);N_GUARD,SBLOCK,XP(C)::S(E),XP(f)
    • P(f);OGATE,SBLOCK,XP(F)::QAB(G)
  • Tries
    • Try
      • S(E);CHECK,XP(b)
      • Vars
        • K(d);P-FLIGHT,XP(C)::QAR1(G),XS(c)
      • Refutation
        • Q(a);XS(E)
    • Try
      • S(E);CHECK,XP(f)
      • Vars
        • K(d);P-FLIGHT,XP(C)::QAR1(G),XS(c)
      • Refutation
        • S(e);CHECK,XS(E)
  • Actual
    • S(E);
    • Threat
      • QAR1(G)
    • Vars
      • K(d);P-FLIGHT,XP(C)::QAR1(G),XS(c)
      • Q(a);SBLOCK,XP(C)::QAB1(G)
      • S(e);SBLOCK,XP(C)::P(B),XS(c)
      • P(f);SBLOCK,XP(F)::QAB1(G),XS(c)
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