MESON Chess Problem Database

Problem Display
PID: 184866 (nq2r1Q1/1pp5/2P1N3/3kPp2/2R5/5b2/B2p4/1KbNr3 w - - 0 1)

Jewetsky, Feodor Orestovich

125 Shakhmaty Zadachi (Eventski), 1908

nq2r1Q1/1pp5/2P1N3/3kPp2/2R5/5b2/B2p4/1KbNr3

#2

8 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Rc5#
  • Tries
    • 1.Sf8+?
      • 1...Re6
        • 2.Qxe6#
      • 1...Kxe5!
    • 1.Rd4+?
      • 1...Kxe5
        • 2.Qg7#
      • 1...Kxc6!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Sf4#
      • 1...Be4+
        • 2.Rc2#
      • 1...bxc6+
        • 2.Rb4#
      • 1...Kxe6
        • 2.Re4#
      • 1...Rxe5
        • 2.Qd7#
      • 1...Rxe6
        • 2.Sc3#
      • 1...Re4
        • 2.Rc5#
      • 1...f4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::B(C)+R(D),DCHECK
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • R(k);N_GUARD,P_SPINR(k)::QAB1(H),XR(k)
      • Refutation
        • K(e);P-FLIGHT,XP(E)
    • Try
      • R(D);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(E)::QAB(H)
      • Refutation
        • K(e);S_FLIGHT,XP(F)
  • Actual
    • Q(H);
    • Threat
      • S(G)
    • Vars
      • B(d);CHECK,SBLOCK::B(C)+R(D)
      • P(g);CHECK,SBLOCK,XP(F)::B(C)+R(D)
      • K(e);S_FLIGHT,XS(G)::B(C)+R(D)
      • R(b);SBLOCK,XP(E)::QAR2(H)
      • R(k);SBLOCK,XS(G)::S(B)
      • R(b);SBLOCK::B(C)+R(D),DCHECK
      • P(f);::S(G),XP(f)
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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).