MESON Chess Problem Database

Problem Display
PID: 194895 (4R3/4K1kp/3P1p1p/1P5P/pQp5/p7/Pn6/1R1n4 w - - 0 1)

Gomez, A

Machado, Antonio Gomes

L'Italia Scacchistica, 1918

4R3/4K1kp/3P1p1p/1P5P/pQp5/p7/Pn6/1R1n4

#2

8 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Rg1#
    • 1...c3
      • 2.Qg4#
  • Tries
    • 1.Qxb2?
      • threat
        • 2.Qxf6#
        • 2.Qg2#
      • 1...Sxb2
        • 2.Rg1#
      • 1...Sf2
        • 2.Qxf6#
      • 1...Sc3
        • 2.Rg1#
        • 2.Qg2#
      • 1...Se3
        • 2.Qxf6#
      • 1...c3
        • 2.Qg2#
      • 1...axb2!
    • 1.Qxc4?
      • threat
        • 2.Rg8#
        • 2.Qf7#
        • 2.Qg8#
        • 2.Qg4#
      • 1...Sf2
        • 2.Rg8#
        • 2.Qf7#
        • 2.Qg8#
      • 1...Se3
        • 2.Rg8#
        • 2.Qf7#
        • 2.Qg8#
      • 1...f5
        • 2.Rg8#
        • 2.Qf7#
        • 2.Qg8#
        • 2.Qd4#
      • 1...Sxc4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxf6#
        • 2.Qg3#
      • 1...Sxc3
        • 2.Rg1#
      • 1...Sf2
        • 2.Qxf6#
      • 1...Se3
        • 2.Qxf6#
      • 1...Sd3
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);OGATE::R(A)
    • P(e);OGATE::QAR(C)
  • Tries
    • Try
      • Q(C);P_PINP(f),XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_SPINP(f),OGATE,XQ(C)::R(A)
        • S(a);::QAB1(C),XP(f)
        • P(e);N_SPINP(f)::QAR(C)
      • Refutation
        • P(c);N_SPINP(f),XQ(C)
    • Try
      • Q(C);XP(e)
      • Threat
        • DUALS(4)
      • Refutation
        • S(b);XQ(C)
  • Actual
    • Q(C);P_PINP(f)
    • Threat
      • DUALS(2)
    • Vars
      • S(a);N_SPINP(f),OGATE,XQ(C)::R(A)
      • S(a);::QAB1(C),XP(f)
      • S(b);::QAB1(C),XP(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).