MESON Chess Problem Database

Problem Display
PID: 218471 (8/6p1/1p2p3/n2kp1K1/2RnN3/N7/3R4/1Q6 w - - 0 1)

Pater, Karl

Philadelphia Times, 1882

8/6p1/1p2p3/n2kp1K1/2RnN3/N7/3R4/1Q6

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Rc5#
  • Tries
    • 1.Sf6+?
      • 1...Kd6
        • 2.Qb4#
      • 1...gxf6+!
    • 1.Qxb6?
      • threat
        • 2.Sc3#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Kxe4!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Se3#
      • 1...Kxc4
        • 2.Se3#
      • 1...Kxe4
        • 2.Qh1#
      • 1...Sxc4
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(e);N_GUARD::R1(D)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB(A)
      • Refutation
        • P(g);CHECK,XS(E)
    • Try
      • Q(A);XP(e)
      • Threat
        • S(E)
      • Vars
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(c);N_SPINS(a),S_FLIGHT,XR(D)::S(C)
      • K(c);OGATEB,S_FLIGHT,XS(E)::QAB(A)
      • S(b);SBLOCK,XR(D)::S(C)
HTML5 logo

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).