MESON Chess Problem Database

Problem Display
PID: 172167 (5Q2/2B1r3/Kp4n1/1pkPb3/2rn4/P2PP3/N2Np1B1/2Rb4 w - - 0 1)

Arnstam, Knut Anders Olof

4th Place, Stockholm Province, 1949

5Q2/2B1r3/Kp4n1/1pkPb3/2rn4/P2PP3/N2Np1B1/2Rb4

#2

11 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Rxc3#
    • 1...Bd6
      • 2.Bxb6#
    • 1...Sc2
      • 2.Sb3#
    • 1...b4
      • 2.Rxc4#
      • 2.axb4#
  • Tries
    • 1.Qxe7+?
      • 1...Bd6
        • 2.Bxb6#
        • 2.Bxd6#
        • 2.Qxd6#
      • 1...Sxe7!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Se4#
      • 1...Bd6
        • 2.Bxb6#
      • 1...Sc2
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(c);OGATEB::R(A),XR(c)
    • B(g);SBLOCK::B(J),XP(h)
    • S(d);N_GUARD,N_SPINR(c),P_SPINR(j),S_CUTB(a)::S(C)
  • Tries
    • Try
      • Q(K);CHECK,XR(j)
      • Refutation
        • S(i);XQ(K)
  • Actual
    • S(B);
    • Threat
      • S(C)
    • Vars
      • B(g);SBLOCK::B(J),XP(h)
      • S(d);N_GUARD,N_SPINR(c),P_SPINR(j),S_CUTB(a)::S(C)
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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).