MESON Chess Problem Database

Problem Display
PID: 262749 (b2R4/4Kp2/p2N1p2/1p2k3/1P1p4/1Q4p1/2N5/5r2 w - - 0 1)

Koci, Vladimir

Comm., SuperProblem, 2013

b2R4/4Kp2/p2N1p2/1p2k3/1P1p4/1Q4p1/2N5/5r2

#2

6 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qe6+?
      • 1...Kf4
        • 2.Qf5#
      • 1...fxe6!
    • 1.Qe3+?
      • 1...Kd5
        • 2.Qe4#
      • 1...Be4
        • 2.Qxe4#
      • 1...dxe3!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qxd4#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd5
        • 2.Qe4#
      • 1...Rd1
        • 2.Qf5#
      • 1...Rf4
        • 2.Sxf7#
      • 1...Be4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);S_CUTR(a),S_FLIGHT::QAR1(B)
      • Refutation
        • P(h);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT,S_CUTB(i)::QAB1(B)
        • B(i);N_GUARD,P_SPINB(i)::QAR1(B),XB(i)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XP(c)
    • Vars
      • K(e);S_CUTR(a),S_FLIGHT::QAR1(B)
      • K(e);P-FLIGHT,P_SPINP(c),S_CUTB(i)::QAB1(B)
      • R(a);N_GUARD::QAR1(B)
      • R(a);SBLOCK::S(D),XP(h)
      • B(i);N_GUARD::QAR1(B),XB(i)
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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).