MESON Chess Problem Database

Problem Display
PID: 263785 (Q1K5/5p1n/5Pb1/3RNR1p/4kr1p/2p4P/5P2/8 w - - 0 1)

van Dijk, Johannes

1st Prize, Tijdschrift vd NSB, 1903

Q1K5/5p1n/5Pb1/3RNR1p/4kr1p/2p4P/5P2/8

#2

8 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Ra5+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxf5!
    • 1.Rb5+?
      • 1...Kd4
        • 2.Qd5#
        • 2.Qa4#
      • 1...Kxf5!
    • 1.Rc5+?
      • 1...Kd4
        • 2.Rc4#
        • 2.Qd5#
      • 1...Kxf5!
  • Keys
    • 1.Sf3!
      • 1...Bxf5+
        • 2.Rd7#
      • 1...Kxf3
        • 2.Rd2#
      • 1...Rxf3
        • 2.Qa4#
      • 1...Rxf5
        • 2.Rd4#
      • 1...Sxf6
        • 2.Sg5#
      • 1...Rg4
        • 2.Qa4#
      • 1...Sg5
        • 2.Sxg5#
      • 1...Sf8
        • 2.Sg5#
      • 1...c2
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(G)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • R(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • R(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XR(E)
  • Actual
    • S(D);
    • Vars
      • B(f);CHECK,SBLOCK,XR(E)::QAB(G)+R(C)
      • K(b);N_GUARD,P_SPINR(c),S_FLIGHT,XS(D)::QAB(G)+R(C)
      • R(c);XS(D)::QAR(G)
      • R(c);SBLOCK,XR(E)::QAB(G)+R(C),DCHECK
      • S(h);N_GUARD,XP(F)::S(D)
      • R(c);::QAR(G)
      • S(h);N_GUARD::S(D),XS(h)
      • S(h);N_GUARD::S(D)
      • P(a);N_GUARD::S(D)
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).