MESON Chess Problem Database

Problem Display
PID: 249917 (1K4nB/2Q1NP1b/1p2rr2/6p1/1P1k1bR1/1P5R/2P1nP2/7B w - - 0 1)

Knuppert, Hugo

Larsen, Lars Aksglade (= Aksglade, Lars)

1st Comm., Deutsche Schachzeitung, 1967

1K4nB/2Q1NP1b/1p2rr2/6p1/1P1k1bR1/1P5R/2P1nP2/7B

#2

12 + 9

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.fxe3#
    • 1...Re4
      • 2.Rd3#
    • 1...Re5
      • 2.Qc4#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Rxe7
      • 2.Qd6#
    • 1...Bd3
      • 2.Rxd3#
    • 1...Bf5
      • 2.Sxf5#
    • 1...Sc1
      • 2.c3#
    • 1...Sg1
      • 2.c3#
  • Tries
    • 1.Rxf4+?
      • 1...Re4
        • 2.Rd3#
        • 2.Qd6#
      • 1...Be4
        • 2.Rd3#
      • 1...Sxf4
        • 2.Qc3#
        • 2.c3#
      • 1...gxf4!
  • Keys
    • 1.f8S!
      • threat
        • 2.Sxe6#
      • 1...Rxe7
        • 2.Qd6#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Re3
        • 2.fxe3#
      • 1...Re4
        • 2.Rd3#
      • 1...Re5
        • 2.Qc4#
      • 1...Rc6
        • 2.Sxc6#
      • 1...Bf5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(f);OGATE::P(C),XR(f)
    • R(f);N_SPINB(c),S_CUTB(h)::R1(E)
    • R(f);N_PINQ(H),N_SPINR(g),SBLOCK::QAR1(H)
    • R(f);N_GUARD::S(I),XR(f)
    • R(f);N_GUARD,N_PINQ(H)::QAR2(H),XR(f)
    • R(f);N_GUARD,XS(I)::QAR2(H)
    • B(h);N_GUARD::R1(E),XB(h)
    • B(h);N_GUARD::S(I),XB(h)
    • S(a);N_GUARD::P(B)
  • Tries
    • Try
      • R(G);CHECK,N_SPINQ(H),XB(c)
      • Vars
        • B(h);P_SPINB(h)::R1(E)
      • Refutation
        • P(d);XR(G)
  • Actual
    • P(J);
    • Threat
      • S(J),XR(f)
    • Vars
      • R(f);N_GUARD,XS(I)::QAR2(H)
      • R(f);N_GUARD,N_PINQ(H)::QAR2(H),XR(f)
      • R(f);OGATE::P(C),XR(f)
      • R(f);N_SPINB(c),S_CUTB(h)::R1(E)
      • R(f);N_PINQ(H),N_SPINR(g),SBLOCK::QAR1(H)
      • R(f);N_GUARD::S(I),XR(f)
      • B(h);N_GUARD::S(I),XB(h)
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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).