MESON Chess Problem Database

Problem Display
PID: 99109 (8/2p1N3/p2q4/3Pp3/1BpkpQ2/4pbP1/2R5/K2N1n2 w - - 0 1)

Ersek, Tibor

Sakkelet, 1998

8/2p1N3/p2q4/3Pp3/1BpkpQ2/4pbP1/2R5/K2N1n2

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qxe3#
    • 1...Sh2
      • 2.Qxe3#
    • 1...Sxg3
      • 2.Qxe3#
  • Tries
    • 1.Rd2+?
      • 1...Sxd2
        • 2.Qxe3#
      • 1...exd2!
    • 1.Qxe5+?
      • 1...Kd3
        • 2.Qc3#
      • 1...Kxe5
        • 2.Bc3#
      • 1...Qxe5!
  • Keys
    • 1.Qxe3+!
      • 1...Sxe3
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAB1(F),XP(b)
    • S(a);N_GUARD,XP(D)::QAB1(F),XP(b)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(a);XR(C)::QAB1(F),XP(b)
      • Refutation
        • P(b);XR(C)
    • Try
      • Q(F);CHECK,N_PINP(f),XP(g)
      • Vars
        • K(e);OGATE,P-FLIGHT::QAR1(F)
        • K(e);S_FLIGHT,XQ(F)::B(E)
      • Refutation
        • Q(i);XQ(F)
  • Actual
    • Q(F);CHECK,N_PINP(f),XP(b)
    • Vars
      • S(a);XQ(F)::R(C)
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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).