MESON Chess Problem Database

Problem Display
PID: 189498 (2r5/6Qp/4p2K/2P1R3/2Pk1nP1/2pn1P2/2p1Bp2/8 w - - 0 1)

Semerad, Bohumil

Pravo lidu, 1911

2r5/6Qp/4p2K/2P1R3/2Pk1nP1/2pn1P2/2p1Bp2/8

#2

8 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Re4#
    • 1...Sxc5
      • 2.Re4#
      • 2.Rxe6#
  • Tries
    • 1.Qd7+?
      • 1...Kxc4
        • 2.Qa4#
      • 1...Kxe5
        • 2.Qg7#
      • 1...Sd5!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Re4#
      • 1...Kxc4
        • 2.Qa4#
      • 1...Kxe5
        • 2.Qg7#
      • 1...Sxe5
        • 2.c6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(i);SBLOCK,XP(E)::QAB(H)+R(F),DCHECK
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);OGATEB,P-FLIGHT,P_SPINS(d),XP(C)::QAR2(H)
        • K(e);OGATEB,S_FLIGHT,XR(F)::QAB(H)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • Q(H);
    • Threat
      • R1(F)
    • Vars
      • K(e);OGATEB,P-FLIGHT,P_SPINS(d),XP(C)::QAR2(H)
      • K(e);OGATEB,S_FLIGHT,XR(F)::QAB(H)
      • S(d);N_GUARD,SBLOCK,XR(F)::QAB(H)+P(E)
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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).