MESON Chess Problem Database

Problem Display
PID: 240651 (6Q1/1n1N1q1r/R4B1p/1KPk1pnR/2p3pb/3P1r2/6B1/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1983

6Q1/1n1N1q1r/R4B1p/1KPk1pnR/2p3pb/3P1r2/6B1/8

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Sb6#
    • 1...Sh3
      • 2.Rxf5#
    • 1...Se4
      • 2.dxc4#
    • 1...Se6
      • 2.Sb6#
      • 2.Rxf5#
    • 1...Sa5
      • 2.Rd6#
    • 1...Sd6+
      • 2.Rxd6#
    • 1...Sd8
      • 2.Rd6#
  • Tries
    • 1.Ba1?
      • threat
        • 2.Sf6#
      • 1...Sd6+
        • 2.Rxd6#
      • 1...Sh3
        • 2.Rxf5#
      • 1...Se4
        • 2.dxc4#
      • 1...Se6
        • 2.Sb6#
      • 1...c3!
    • 1.Bb2?
      • threat
        • 2.Sf6#
      • 1...Sd6+
        • 2.Rxd6#
      • 1...Sh3
        • 2.Rxf5#
      • 1...Se4
        • 2.dxc4#
      • 1...Se6
        • 2.Sb6#
      • 1...c3!
    • 1.Rc6?
      • threat
        • 2.Sb6#
      • 1...Sd6+
        • 2.Rxd6#
      • 1...cxd3!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Sf6#
      • 1...Sd6+
        • 2.Rxd6#
      • 1...Sh3
        • 2.Rxf5#
      • 1...Se4
        • 2.dxc4#
      • 1...Se6
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(j);::S(H)
    • S(g);OGATE,P_SPINP(f)::R(E),XP(f)
    • S(g);N_SPINR(a),P_SPINP(f),SBLOCK::P(B),XP(b)
    • S(i);N_GUARD::R1(F)
    • S(i);CHECK,N_GUARD::R1(F),XS(i)
  • Tries
    • Try
      • B(G);
      • Threat
        • S(H)
      • Vars
        • S(i);CHECK,N_GUARD::R1(F),XS(i)
        • S(g);OGATE,P_SPINP(f)::R(E),XP(f)
        • S(g);N_SPINR(a),P_SPINP(f),SBLOCK::P(B),XP(b)
        • S(g);N_SPINQ(j),P_SPINP(f),SBLOCK::S(H)
      • Refutation
        • P(b);
    • Try
      • B(G);
      • Threat
        • S(H)
      • Vars
        • S(i);CHECK,N_GUARD::R1(F),XS(i)
        • S(g);OGATE,P_SPINP(f)::R(E),XP(f)
        • S(g);N_SPINR(a),P_SPINP(f),SBLOCK::P(B),XP(b)
        • S(g);N_SPINQ(j),P_SPINP(f),SBLOCK::S(H)
      • Refutation
        • P(b);
    • Try
      • R(F);
      • Threat
        • S(H)
      • Vars
        • S(i);CHECK,N_GUARD::R1(F),XS(i)
      • Refutation
        • P(b);XP(B)
  • Actual
    • B(G);
    • Threat
      • S(H)
    • Vars
      • S(i);CHECK,N_GUARD::R1(F),XS(i)
      • S(g);OGATE,P_SPINP(f)::R(E),XP(f)
      • S(g);N_SPINR(a),P_SPINP(f),SBLOCK::P(B),XP(b)
      • S(g);N_SPINQ(j),P_SPINP(f),SBLOCK::S(H)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).