MESON Chess Problem Database

Problem Display
PID: 132419 (8/3K1p1N/3n1pb1/1Rp2k2/1bP1rr2/3B4/2N4B/4Q3 w - - 0 1)

Koltanowski, George

Source?, 0000

8/3K1p1N/3n1pb1/1Rp2k2/1bP1rr2/3B4/2N4B/4Q3

#2

8 + 9

2425 San Francisco Chronicle 0000

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Se3#
    • 1...Rf2
      • 2.Se3#
    • 1...Rg4
      • 2.Se3#
      • 2.Sd4#
    • 1...Rh4
      • 2.Se3#
  • Tries
    • 1.Rxc5+?
      • 1...Kg4
        • 2.Qg3#
      • 1...Bxc5!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qxf4#
      • 1...Ke5
        • 2.Qxf6#
      • 1...Rxh4
        • 2.Se3#
      • 1...Bxh7
        • 2.Qh5#
      • 1...Bh5
        • 2.Qxh5#
      • 1...Rf1
        • 2.Se3#
        • 2.Sd4#
        • 2.Qh3#
      • 1...Rf2
        • 2.Se3#
        • 2.Sd4#
        • 2.Qh3#
      • 1...Rf3
        • 2.Sd4#
      • 1...Rg4
        • 2.Se3#
        • 2.Sd4#
        • 2.Qxf6#
      • 1...Bd2
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(c);::S(B)
  • Tries
    • Try
      • R(F);CHECK,XP(d)
      • Vars
        • K(e);N_SPINR(b),S_FLIGHT::QAR1(A)
      • Refutation
        • B(a);XR(F)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XR(c)
    • Vars
      • K(e);N_SPINR(b),P-FLIGHT,P_SPINR(c)::QAB1(A),XP(g)
      • R(c);XQ(A)::S(B)
      • B(h);N_GUARD,XS(H)::QAR2(A)
      • B(h);N_GUARD::QAR2(A),XB(h)
      • R(c);::S(B)
      • B(a);N_GUARD::R(F),XP(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).