MESON Chess Problem Database

Problem Display
PID: 166368 (BB1r3b/1rN2N1K/P4p2/n1p1n1p1/2P1k1P1/1p2P3/b4R2/3QR3 w - - 0 1)

Colaneri, Bruno

Best Problems, 2017

BB1r3b/1rN2N1K/P4p2/n1p1n1p1/2P1k1P1/1p2P3/b4R2/3QR3

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.exd4#
    • 1...Rd5
      • 2.Qxd5#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Rxb8
      • 2.Sd6#
      • 2.Qd5#
    • 1...Rc8
      • 2.Sd6#
      • 2.Qd5#
    • 1...Re8
      • 2.Sd6#
      • 2.Qd5#
    • 1...Rf8
      • 2.Sd6#
      • 2.Qd5#
    • 1...Rg8
      • 2.Sd6#
      • 2.Qd5#
    • 1...Sd3
      • 2.Qf3#
    • 1...Sd7
      • 2.Qd5#
    • 1...f5
      • 2.Sxg5#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Sc3#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Rxf7+!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sxc5#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Rc8
        • 2.Qd5#
      • 1...Sd3
        • 2.Qf3#
      • 1...Sd7
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(j);OGATE::R(B)+P(D),XR(j)
    • R(j);N_GUARD,N_SPINR(i)::QAB1(A),XR(j)
    • R(j);N_GUARD::S(I),XR(j)
    • S(f);N_GUARD,SBLOCK::QAB1(A)
    • S(f);S_CUTR(j)::QAB1(A)
    • P(h);N_GUARD::S(I),XP(g)
  • Tries
    • Try
      • S(H);N_PINR(i),P_SPINS(I)
      • Threat
        • S(H)
      • Vars
        • R(j);OGATE,XS(H)::QAB1(A),XR(j)
      • Refutation
        • R(i);CHECK,XS(I)
  • Actual
    • S(H);P_SPINS(I)
    • Threat
      • S(H),XP(e)
    • Vars
      • R(j);N_GUARD,N_SPINR(i)::QAB1(A),XR(j)
      • R(j);N_GUARD::QAB1(A)
      • S(f);N_GUARD,SBLOCK::QAB1(A)
      • S(f);N_PINS(I),S_CUTR(j)::QAB1(A)
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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).