MESON Chess Problem Database

Problem Display
PID: 176027 (6B1/2b2Q1b/8/2R5/1P1k2p1/2pP1nP1/K1P5/8 w - - 0 1)

Freund, W

Schach-Echo, 1940

6B1/2b2Q1b/8/2R5/1P1k2p1/2pP1nP1/K1P5/8

#2

8 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qf2#
    • 1...Sg1
      • 2.Qf2#
    • 1...Sd2
      • 2.Qf2#
    • 1...Sh2
      • 2.Qf2#
    • 1...Sh4
      • 2.Qf2#
    • 1...Se5
      • 2.Qf2#
    • 1...Sg5
      • 2.Qf2#
  • Tries
    • 1.Rc4+?
      • 1...Ke5
        • 2.Qe6#
        • 2.Qf4#
      • 1...Ke3!
    • 1.Qf4+?
      • 1...Be4
        • 2.Rc4#
        • 2.Rd5#
        • 2.Qxe4#
      • 1...Bxf4!
  • Keys
    • 1.Re5!
      • threat
        • 2.Qd5#
      • 1...Kxe5
        • 2.Qf4#
      • 1...Bxe5
        • 2.Qa7#
      • 1...Bxg8
        • 2.Re4#
      • 1...Sxe5
        • 2.Qf2#
      • 1...Be4
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • S(b);OGATE::QAB(G)
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Refutation
        • B(e);XQ(G)
  • Actual
    • R(F);
    • Threat
      • QAR1(G)
    • Vars
      • K(c);S_FLIGHT,XR(F)::QAB1(G)
      • B(e);OGATE,SBLOCK,XR(F)::QAB(G)
      • B(f);N_GUARD,P_PINQ(G),XB(H)::R1(F)
      • S(b);OGATE,SBLOCK,XR(F)::QAB(G)
      • B(f);N_GUARD::R1(F),XB(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).