MESON Chess Problem Database

Problem Display
PID: 173727 (b6B/3n4/BppR1b1Q/1r4pK/2k1r1P1/PN1R4/4p3/4N3 w - - 0 1)

Boros, Sandor

Shakhmaty, 1927

b6B/3n4/BppR1b1Q/1r4pK/2k1r1P1/PN1R4/4p3/4N3

#2

10 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.R6d4#
    • 1...Bc3
      • 2.Rxc3#
    • 1...Be5
      • 2.Qe6#
    • 1...Be7
      • 2.Rc3#
    • 1...Bd8
      • 2.Rc3#
    • 1...Sc5
      • 2.Sd2#
    • 1...c5
      • 2.Sd2#
  • Tries
    • 1.Rxc6+?
      • 1...Sc5
        • 2.Sd2#
      • 1...Bxc6!
    • 1.Qxf6?
      • threat
        • 2.Rc3#
        • 2.Qc3#
      • 1...Re3
        • 2.R6d4#
        • 2.Qc3#
        • 2.Qd4#
      • 1...Rd4
        • 2.R6xd4#
        • 2.Qxd4#
      • 1...Re5
        • 2.R6d4#
      • 1...Se5
        • 2.Qe6#
      • 1...Sxf6+!
  • Keys
    • 1.Qxg5!
      • threat
        • 2.Sd2#
      • 1...Bxg5
        • 2.Rc3#
      • 1...Bc3
        • 2.Rxc3#
      • 1...Re5
        • 2.R6d4#
      • 1...Be5
        • 2.Qg8#
      • 1...Se5
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD,S_CUTB(h)::R1(H)
    • B(h);N_GUARD::R1(D),XB(h)
    • B(h);OGATE::QAB(I)
    • B(h);N_GUARD::R1(D)
    • S(i);SBLOCK::S(C)
    • P(g);SBLOCK::S(C)
  • Tries
    • Try
      • R(H);CHECK,XP(g)
      • Vars
        • S(i);P_SPINS(i)::S(C)
      • Refutation
        • B(j);XR(H)
    • Try
      • Q(I);XB(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);N_GUARD::R1(H)
        • S(i);S_CUTR(c)::QAB(I)
      • Refutation
        • S(i);CHECK,XQ(I)
  • Actual
    • Q(I);P_SPINQ(I),XP(e)
    • Threat
      • S(C)
    • Vars
      • B(h);N_GUARD,XQ(I)::R1(D)
      • B(h);N_GUARD::R1(D),XB(h)
      • R(c);N_GUARD,S_CUTB(h)::R1(H)
      • B(h);N_PINQ(I)::QAB(I)
      • S(i);N_PINQ(I)::QAR(I)
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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).