MESON Chess Problem Database

Problem Display
PID: 106752 (7K/2pB4/1NN1pp1p/bQ3R1r/1p2kP2/r3P1R1/1Pnp1P2/3n4 w - - 0 1)

Retter, Yosef

4/6 Place, Subotica Quick Ty., 2009

7K/2pB4/1NN1pp1p/bQ3R1r/1p2kP2/r3P1R1/1Pnp1P2/3n4

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sdxe3
      • 2.f3#
    • 1...Scxe3
      • 2.f3#
    • 1...exf5
      • 2.Qd5#
    • 1...e5
      • 2.Qd5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sxd2#
      • 1...Kd3
        • 2.Sd6#
      • 1...Rd3
        • 2.f3#
      • 1...b3!
    • 1.Qc4+?
      • 1...Kxf5
        • 2.Se7#
        • 2.Bxe6#
        • 2.Qd5#
        • 2.Qxe6#
      • 1...Sd4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sxf6#
      • 1...Kxf5
        • 2.Sc3#
      • 1...Rxf5
        • 2.f3#
      • 1...exd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(a);SBLOCK,XP(C)::P(B)
    • S(b);SBLOCK,XP(C)::P(B)
    • P(i);N_GUARD,XR(G)::QAB1(F)
    • P(i);N_GUARD::QAB1(F)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H),XP(c)
      • Vars
        • K(f);S_FLIGHT::QAB(F)+S(H)
        • R(d);SBLOCK::P(B)
      • Refutation
        • P(e);
    • Try
      • Q(F);CHECK
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • S(H);
    • Threat
      • S(H),XP(j)
    • Vars
      • K(f);P_SPINP(i),S_FLIGHT,XR(G)::QAR(F)+S(H)
      • R(h);SBLOCK,XR(G)::P(B)
      • P(i);OGATE,XS(H)::QAB1(F),XP(i)
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).