MESON Chess Problem Database

Problem Display
PID: 239852 (2BK4/2R1p3/1p2P3/3kPN1R/r6q/1P1NpP2/8/3Q3r w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Themes-64, 1980

2BK4/2R1p3/1p2P3/3kPN1R/r6q/1P1NpP2/8/3Q3r

#2

11 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sxe7#
    • 1...Rd4
      • 2.Sxe3#
    • 1...b5
      • 2.Rc5#
  • Tries
    • 1.Se1+?
      • 1...Qd4
        • 2.Sxe3#
        • 2.Sxe7#
      • 1...Rd4
        • 2.Sxe3#
      • 1...Kxe5!
    • 1.Sxh4?
      • threat
        • 2.Sb4#
        • 2.Sf4#
      • 1...Kd4
        • 2.Se1#
      • 1...Rb4
        • 2.Sxb4#
        • 2.Sf4#
      • 1...Rf4
        • 2.Sb4#
        • 2.Sxf4#
      • 1...Rxd1!
    • 1.Sxe7+?
      • 1...Kd4
        • 2.Se1#
      • 1...Qxe7+!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Rd7#
      • 1...Kxd4
        • 2.Se1#
      • 1...Qxd4
        • 2.Sf4#
      • 1...Rxd4
        • 2.Sb4#
      • 1...Ra7
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(d);N_GUARD,SBLOCK::S(F),XP(g)
    • R(c);SBLOCK::S(F),XP(b)
    • P(f);N_GUARD::R1(I)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(c);P_SPINR(c)::S(F),XP(b)
      • Refutation
        • K(e);P-FLIGHT,XP(E)
    • Try
      • S(F);XQ(d)
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P-FLIGHT::QAR(A)+S(C)
      • Refutation
        • R(a);XQ(A)
    • Try
      • S(F);CHECK,P_SPINS(F),XP(g)
      • Vars
        • K(e);P-FLIGHT::QAR(A)+S(C)
      • Refutation
        • Q(d);CHECK,XS(F)
  • Actual
    • S(F);
    • Threat
      • R(I)
    • Vars
      • K(e);P-FLIGHT,XS(F)::QAR(A)+S(C)
      • Q(d);N_GUARD,XS(F)::S(C)
      • R(c);N_GUARD,XS(F)::S(C)
      • R(c);N_GUARD::S(C)
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