MESON Chess Problem Database

Problem Display
PID: 230255 (8/5Rp1/1qPpkbQ1/3n4/2nR4/1B1N4/b1N5/6K1 w - - 0 1)

Coello Alonso, Jose Antonio

BCPS Website, 2021

8/5Rp1/1qPpkbQ1/3n4/2nR4/1B1N4/b1N5/6K1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4+
      • 2.Sxd4#
    • 1...Sce3
      • 2.Re4#
    • 1...Se5
      • 2.Sf4#
  • Tries
    • 1.Sf4+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Sxf4!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Qg4#
      • 1...Qxd4+
        • 2.Sxd4#
      • 1...Sce3
        • 2.Re4#
      • 1...Se5
        • 2.Sf4#
      • 1...Sde3
        • 2.R4xd6#
      • 1...Se7
        • 2.Rxd6#

This is a version of 183420

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(d);CHECK,XR(E)::S(B),XQ(d)
    • S(b);N_PINR(E),P_SPINS(c)::R(E)
    • S(b);P_SPINS(c),SBLOCK::S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(f);N_SPINB(g),P-FLIGHT::QAR1(G)
      • Refutation
        • S(c);P_SPINS(b),XS(D)
  • Actual
    • R(H);
    • Threat
      • QAB(G)
    • Vars
      • Q(d);CHECK,XR(E)::S(B),XQ(d)
      • S(b);N_PINR(E),P_SPINS(c)::R(E)
      • S(b);P_SPINS(c),SBLOCK::S(D)
      • S(c);N_PINR(E),P_SPINS(b)::R1(E),XP(e)
      • S(c);P_SPINS(b),SBLOCK::R1(H),XP(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).