MESON Chess Problem Database

Problem Display
PID: 103600 (4K2b/2Qp1B2/8/6p1/1pNPk3/Rq2pRBP/nPN1b1p1/3n4 w - - 0 1)

Jancek, Jan

Praca, 1955

4K2b/2Qp1B2/8/6p1/1pNPk3/Rq2pRBP/nPN1b1p1/3n4

#2

11 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Bg6#
    • 1...Kxf3
      • 2.Bd5#
  • Tries
    • 1.Bg6+?
      • 1...Kxf3
        • 2.Se1#
      • 1...Kd5!
    • 1.Rf4+?
      • 1...Kd3
        • 2.Se1#
        • 2.Bg6#
      • 1...gxf4!
    • 1.Qf4+?
      • 1...Kd3
        • 2.Se1#
        • 2.Qf5#
      • 1...gxf4!
    • 1.Qe5+?
      • 1...Kd3
        • 2.Se1#
        • 2.Qf5#
      • 1...Kxf3
        • 2.Se1#
        • 2.Bd5#
      • 1...Bxe5!
  • Keys
    • 1.Qxd7!
      • threat
        • 2.Qf5#
      • 1...Kd3
        • 2.Qf5#
      • 1...Kxf3
        • 2.Qg4#
      • 1...Qxc2
        • 2.Qg4#
        • 2.Qd5#
      • 1...Bxf3
        • 2.Bg6#
      • 1...Qa4
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(h);P_SPINP(f),P_SPINQ(e),S_FLIGHT::B(J)
    • K(h);S_FLIGHT,XR(D)::B(J)
  • Tries
    • Try
      • B(J);CHECK
      • Vars
        • K(h);S_FLIGHT,XR(D)::S(B)
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • P(i);XR(D)
    • Try
      • Q(I);CHECK
      • Refutation
        • P(i);XQ(I)
    • Try
      • Q(I);CHECK
      • Refutation
        • B(k);XQ(I)
  • Actual
    • Q(I);XP(j)
    • Threat
      • QAB1(I)
    • Vars
      • K(h);P_SPINP(f),P_SPINQ(e),S_FLIGHT::QAB(I)
      • K(h);S_FLIGHT,XR(D)::QAB1(I)
      • B(c);SBLOCK,XR(D)::B(J)
      • Q(e);P_PINQ(I)::B(J)
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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).