MESON Chess Problem Database

Problem Display
PID: 225389 (4r3/2p5/p1QP4/4PP2/1ppk2N1/1p2p1P1/3p1BK1/qB1N2b1 w - - 0 1)

Beszczynski, Jan

Praca, 1956

4r3/2p5/p1QP4/4PP2/1ppk2N1/1p2p1P1/3p1BK1/qB1N2b1

#2

10 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Bxe3#
    • 1...cxd6
      • 2.Qxd6#
  • Tries
    • 1.Sgxe3?
      • threat
        • 2.Qd5#
      • 1...Kxe5
        • 2.Sg4#
      • 1...Rxe5
        • 2.Qxc4#
      • 1...Qa5!
  • Keys
    • 1.Sdxe3!
      • threat
        • 2.Qxc4#
      • 1...Kc3
        • 2.Sd1#
      • 1...Qc3
        • 2.Qd5#
      • 1...c3
        • 2.Qd5#
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::B(C),XP(e)
    • P(j);OGATE,XP(J)::QAR2(I),XP(j)
  • Tries
    • Try
      • S(F);XP(e)
      • Threat
        • QAR1(I)
      • Vars
        • K(h);S_FLIGHT,XP(G)::S(F)
        • R(k);SBLOCK,XP(G)::QAR1(I),XP(g)
      • Refutation
        • Q(a);
  • Actual
    • S(B);XP(e)
    • Threat
      • QAR1(I),XP(g)
    • Vars
      • K(h);P_SPINP(g),S_FLIGHT::S(B)
      • Q(a);SBLOCK::QAR1(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).