MESON Chess Problem Database

Problem Display
PID: 175117 (3N4/n1N5/Pnp5/R1P1p3/1k2K3/1Pp5/1R6/3BB3 w - - 0 1)

Willemsen, HA

Source?, 1902

3N4/n1N5/Pnp5/R1P1p3/1k2K3/1Pp5/1R6/3BB3

#2

10 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa5
      • 2.Bxc3#
      • 2.b4#
    • 1...Sc8
      • 2.Sxc6#
  • Tries
    • 1.Rba2?
      • 1...Sa4
        • 2.R2xa4#
      • 1...Sc4
        • 2.R2a4#
      • 1...Sd5
        • 2.R2a4#
      • 1...Sd7
        • 2.R2a4#
      • 1...Sa8
        • 2.R2a4#
      • 1...Sbc8
        • 2.R2a4#
      • 1...Sac8
        • 2.Sxc6#
      • 1...Sb5!
    • 1.Ra4+?
      • 1...Kxc5
        • 2.Sb7#
      • 1...Sxa4!
  • Keys
    • 1.Bf2!
      • 1...Kxa5
        • 2.b4#
      • 1...cxb2
        • 2.Be1#
      • 1...Sa4
        • 2.Rxa4#
      • 1...c2
        • 2.Be1#
      • 1...Sb5
        • 2.Sxc6#
      • 1...Sc4
        • 2.Ra4#
      • 1...Sd5
        • 2.Ra4#
      • 1...Sd7
        • 2.Ra4#
      • 1...Sa8
        • 2.Ra4#
      • 1...Sbc8
        • 2.Ra4#
      • 1...Sac8
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD::S(J),XP(e)
  • Tries
    • Try
      • R(C);
      • Vars
        • S(d);N_GUARD::R1(C),XS(d)
        • S(d);N_GUARD::R1(C)
        • S(f);N_GUARD::S(J),XP(e)
      • Refutation
        • S(f);
    • Try
      • R(F);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT,XP(G)::S(J)
      • Refutation
        • S(d);XR(F)
  • Actual
    • B(B);N_PINP(a)
    • Vars
      • K(b);OGATE,S_FLIGHT,XR(F)::P(D)
      • P(a);OGATEB,XR(C)::B(B)
      • S(d);N_GUARD::R1(F),XS(d)
      • P(a);OGATEB::B(B)
      • S(f);N_GUARD::S(J),XP(e)
      • S(d);N_GUARD::R1(F)
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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).