MESON Chess Problem Database

Problem Display
PID: 255676 (8/Bp2pp2/1R2P3/1K6/3kNNQn/1np5/B1prR2p/8 w - - 0 1)

den Toom, Bas

Probleemblad, 1984

8/Bp2pp2/1R2P3/1K6/3kNNQn/1np5/B1prR2p/8

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Qg7#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Rd6#
        • 2.Qd5#
      • 1...Rxe2
        • 2.Rd6#
      • 1...fxe6
        • 2.Rd6#
      • 1...Sc5
        • 2.Qxc5#
        • 2.Qd5#
      • 1...Sxf5!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Rd6#
      • 1...Kxd3
        • 2.Sf2#
      • 1...Kd5
        • 2.Sxc3#
      • 1...Rxd3
        • 2.Sf6#
      • 1...Sc5
        • 2.Sexc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(j);N_GUARD::QAB(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XR(B)::B(I)+R(G),DCHECK
        • P(j);XP(H)::B(I)+R(G),DCHECK
      • Refutation
        • S(g);XQ(E)
  • Actual
    • S(D);
    • Threat
      • B(I)+R(G),DCHECK
    • Vars
      • K(f);N_GUARD,P-FLIGHT,XS(D)::S(C)
      • K(f);N_GUARD,P-FLIGHT,P_SPINS(d)::S(C),XP(e)
      • R(b);SBLOCK,XS(D)::QAR(E)+S(C)
      • S(d);::QAR(E)+S(C),XS(d)
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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).