MESON Chess Problem Database

Problem Display
PID: 23677 (8/4p3/1R2Kp1p/8/1Pk1BRn1/5N1b/2P1rp1p/1r1NqQ2 w - - 0 1)

ten Cate, Pieter

4th HM., Times & Mirror, 1925

8/4p3/1R2Kp1p/8/1Pk1BRn1/5N1b/2P1rp1p/1r1NqQ2

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Se3+
      • 2.Bf5#
    • 1...Se5+
      • 2.Bf5#
  • Tries
    • 1.Sd2+?
      • 1...Kd4
        • 2.c3#
      • 1...Qxd2!
    • 1.Se5+?
      • 1...Sxe5+
        • 2.Bf5#
      • 1...fxe5
        • 2.Bd3#
        • 2.Bd5#
      • 1...Kd4!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Rc5#
      • 1...Qxb4
        • 2.Qxe2#
      • 1...Rxb4
        • 2.Rc6#
      • 1...Se3
        • 2.Bd3#
      • 1...Se5
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(h);CHECK,N_PINB(F)::R(G)+B(F)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(g);N_SPINR(c),P-FLIGHT::P(C)
      • Refutation
        • Q(b);XS(D)
    • Try
      • S(D);CHECK,N_SPINB(F)
      • Vars
        • S(h);CHECK,XS(D)::R(G)+B(F)
      • Refutation
        • K(g);N_SPINR(c),P-FLIGHT
  • Actual
    • R(G);
    • Threat
      • R1(G)
    • Vars
      • Q(b);N_GUARD,XP(E)::QAB(B),XR(c)
      • R(a);SBLOCK,XP(E)::R(H)
      • S(h);N_PINB(F),P_PINR(G)::B(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).