MESON Chess Problem Database

Problem Display
PID: 83851 (2B3b1/2p2N2/3bpR2/r5p1/p3k1P1/4Np2/K2Q4/8 w - - 0 1)

Roura, Juan R

Good Companions, 1919

2B3b1/2p2N2/3bpR2/r5p1/p3k1P1/4Np2/K2Q4/8

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Sxg5#
    • 1...c5
      • 2.Bb7#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Sf2#
        • 2.Sc3#
      • 1...Rc5
        • 2.Sf2#
      • 1...Bg3
        • 2.Sc3#
      • 1...Bb4
        • 2.Sf2#
      • 1...Bc5
        • 2.Sc3#
        • 2.Rxe6#
      • 1...Be5
        • 2.Sf2#
        • 2.Sxg5#
      • 1...f2
        • 2.Sxf2#
        • 2.Sc3#
      • 1...Bxf7!
    • 1.Sxg5+?
      • 1...Ke5
        • 2.Qc3#
        • 2.Qb2#
      • 1...Rxg5!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Qd4#
      • 1...Rd5
        • 2.Qe3#
      • 1...Bc5
        • 2.Rxe6#
      • 1...Be5
        • 2.Sxg5#
      • 1...e5
        • 2.Bf5#
      • 1...c5
        • 2.Bb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(f);SBLOCK,S_CUTR(d)::S(F),XP(e)
    • P(h);N_GUARD,S_CUTR(d)::B(G)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::S(C)
        • B(f);::S(C)
      • Refutation
        • B(i);XS(F)
    • Try
      • S(F);CHECK,XP(e)
      • Refutation
        • R(d);XS(F)
  • Actual
    • S(C);
    • Threat
      • QAR1(B)
    • Vars
      • R(d);SBLOCK::QAR1(B)
      • B(f);N_GUARD,S_CUTR(d)::R(E),XP(g)
      • B(f);SBLOCK,S_CUTR(d)::S(F),XP(e)
      • P(g);OGATE,P_PINS(F)::B(G)
      • P(h);N_GUARD,S_CUTR(d)::B(G)
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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).