MESON Chess Problem Database

Problem Display
PID: 175198 (b6b/q1p5/2pN2K1/5Pp1/1BBk2pp/2R5/6pQ/2n2N2 w - - 0 1)

Anonymous

Philadelphia Times, 1902

b6b/q1p5/2pN2K1/5Pp1/1BBk2pp/2R5/6pQ/2n2N2

#2

8 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Qg1#
    • 1...Sa2
      • 2.Rd3#
    • 1...Se2
      • 2.Rd3#
    • 1...Sb3
      • 2.Rd3#
    • 1...Sd3
      • 2.Rxd3#
  • Tries
    • 1.Sb5+?
      • 1...Ke4
        • 2.Sd2#
      • 1...cxb5!
    • 1.Re3?
      • threat
        • 2.Re4#
      • 1...c5
        • 2.Bc3#
      • 1...cxd6!
  • Keys
    • 1.Rg3!
      • threat
        • 2.Rxg4#
      • 1...Ke5
        • 2.Rxg4#
      • 1...gxf1Q
        • 2.Qb2#
      • 1...gxf1S
        • 2.Qb2#
      • 1...gxf1B
        • 2.Qb2#
      • 1...gxf1R
        • 2.Qb2#
      • 1...hxg3
        • 2.Qxh8#
      • 1...g1Q
        • 2.Qb2#
      • 1...g1R
        • 2.Qb2#
      • 1...Be5
        • 2.Qg1#
      • 1...Se2
        • 2.Rd3#
      • 1...Sd3
        • 2.Rxd3#
      • 1...c5
        • 2.Bc3#

This is a version of 175222

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • B(k);SBLOCK::QAB(B)
    • S(a);N_GUARD::R1(C)
    • S(a);N_GUARD::R1(C),XS(a)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P-FLIGHT::S(A)
      • Refutation
        • P(g);XS(G)
    • Try
      • R(C);
      • Threat
        • R1(C)
      • Vars
        • P(g);SBLOCK::B(D)
      • Refutation
        • P(i);XS(G)
  • Actual
    • R(C);
    • Threat
      • R(C),XP(d)
    • Vars
      • K(c);S_FLIGHT::QAB(B)+R(C),XP(d)
      • P(b);OGATE,XS(A)::QAB(B)
      • P(e);OGATE,XR(C)::QAB(B),XB(k)
      • P(b);OGATE::QAB(B)
      • B(k);SBLOCK::QAB(B)
      • S(a);N_GUARD::R1(C)
      • S(a);N_GUARD::R1(C),XS(a)
      • P(g);SBLOCK::B(D)
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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).