MESON Chess Problem Database

Problem Display
PID: 120801 (3R2n1/2p5/2P2p2/3PpQ1n/1Kpk3r/3B3r/4bP1b/3R4 w - - 0 1)

Youngs, Joe Casey

Northwest Chess, 1977

3R2n1/2p5/2P2p2/3PpQ1n/1Kpk3r/3B3r/4bP1b/3R4

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qxe4#
    • 1...Bf3
      • 2.Be2#
    • 1...Bg4
      • 2.Qe4#
    • 1...Bg3
      • 2.Bxe2#
    • 1...Bf4
      • 2.Qe4#
    • 1...Sg3
      • 2.Bxe2#
    • 1...Sf4
      • 2.Qe4#
  • Keys
    • 1.d6!
      • threat
        • 2.dxc7#
      • 1...Kd5
        • 2.Be4#
      • 1...cxd6
        • 2.Rxd6#
      • 1...Bf3
        • 2.Be2#
      • 1...Sf4
        • 2.Qe4#
      • 1...Se7
        • 2.dxe7#
      • 1...e4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(f);N_GUARD::QAR1(F),XR(f)
    • B(a);S_CUTR(c)::R(A)+B(C)
    • B(a);S_CUTR(f)::QAR1(F)
    • B(b);S_CUTR(c)::R(A)+B(C),XB(a)
    • B(b);S_CUTR(f)::QAR1(F)
    • S(h);S_CUTR(c)::R(A)+B(C),XB(a)
    • S(h);S_CUTR(f)::QAR1(F)
  • Actual
    • P(E);
    • Threat
      • R(H)+P(E),XP(j)
    • Vars
      • K(e);P-FLIGHT,P_SPINP(g)::R(A)+B(C),DCHECK
      • P(j);OGATE,P_SPINP(j),XP(E)::R(H),XP(j)
      • B(a);S_CUTR(c)::R(A)+B(C)
      • S(h);S_CUTR(f)::QAR1(F)
      • S(k);OGATE::R(H)+P(E),XS(k)
      • P(g);OGATE::QAB1(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).