MESON Chess Problem Database

Problem Display
PID: 229145 (8/2p1rp2/8/4Rb2/5p1B/2K2Qr1/1N2P2b/3Nk3 w - - 0 1)

ten Cate, Pieter

L'Echiquier, 1926

8/2p1rp2/8/4Rb2/5p1B/2K2Qr1/1N2P2b/3Nk3

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Qf2#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sg2#
        • 2.Qf1#
      • 1...Bh3
        • 2.Sd3#
        • 2.Sc2#
      • 1...fxe3!
    • 1.Sd3+?
      • 1...Kxd1
        • 2.Qf1#
      • 1...Bxd3!
    • 1.Bxg3+?
      • 1...Bxg3
        • 2.Qh1#
      • 1...fxg3!
  • Keys
    • 1.e4!
      • threat
        • 2.Sd3#
      • 1...fxe4 ep
        • 2.Qf2#
      • 1...Rd7
        • 2.exf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(e);N_PINQ(E)::QAB1(E)
  • Tries
    • Try
      • S(A);N_SPINQ(E)
      • Threat
        • DUALS(2)
      • Refutation
        • P(d);XS(A)
    • Try
      • S(B);CHECK,N_SPINQ(E)
      • Vars
        • K(a);N_SPINR(c),P-FLIGHT,XS(A)::QAR2(E)
      • Refutation
        • B(e);XS(B)
    • Try
      • B(F);CHECK,N_SPINQ(E),XR(c)
      • Vars
        • B(b);XB(F)::QAR(E)
      • Refutation
        • P(d);XB(F)
  • Actual
    • P(C);
    • Threat
      • S(B)
    • Vars
      • P(d);EP,N_PINQ(E),P_SPINP(d),XP(C)::QAB1(E)
      • R(g);N_GUARD::R(G)+P(C),XB(e)
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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).