MESON Chess Problem Database

Problem Display
PID: 214814 (bB1K4/2p5/5p2/4p1Q1/1P1kN3/1B2R1r1/2rPP3/5q2 w - - 0 1)

Coello Alonso, Jose Antonio

Best Problems, 2020

bB1K4/2p5/5p2/4p1Q1/1P1kN3/1B2R1r1/2rPP3/5q2

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.dxc3#
    • 1...Rxe3
      • 2.Qxe3#
  • Tries
    • 1.Ba7+?
      • 1...Rc5
        • 2.Bxc5#
      • 1...c5!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Sb5#
      • 1...Qxe2
        • 2.Sxe2#
      • 1...Rxc3
        • 2.dxc3#
      • 1...Rxe3
        • 2.Qxe3#
      • 1...Bc6
        • 2.Ba7#
      • 1...c6
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);OGATE::P(A),XR(b)
    • R(c);OGATE,XR(D)::QAB1(G),XR(c)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::B(H),XR(b)
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • Q(a);XP(B)::S(F),XQ(a)
      • R(b);OGATE,XS(F)::P(A),XR(b)
      • R(c);OGATE,XR(D)::QAB1(G),XR(c)
      • B(h);S_CUTP(g)::B(H)
      • P(g);S_CUTB(h)::R1(D)
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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).