MESON Chess Problem Database

Problem Display
PID: 214558 (8/1p1BB3/1p2r1N1/1K1kP2p/2p5/2P4n/3nQ3/8 w - - 0 1)

Abraham, Victor

New York Era, 1880

8/1p1BB3/1p2r1N1/1K1kP2p/2p5/2P4n/3nQ3/8

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Qxe5#
    • 1...Rxe7
      • 2.Sxe7#
    • 1...Sb1
      • 2.Qf3#
      • 2.Qxc4#
      • 2.Qg2#
    • 1...Sf1
      • 2.Qf3#
      • 2.Qxc4#
      • 2.Qg2#
    • 1...Sb3
      • 2.Qf3#
      • 2.Qxc4#
      • 2.Qg2#
    • 1...Sf3
      • 2.Qxf3#
      • 2.Qxc4#
    • 1...Se4
      • 2.Qxc4#
    • 1...Sg1
      • 2.Sf4#
    • 1...Sf2
      • 2.Sf4#
    • 1...Sf4
      • 2.Sxf4#
    • 1...Sg5
      • 2.Sf4#
  • Tries
    • 1.Qg2+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Se4!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qd4#
      • 1...Sb3
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(g);OGATE,XP(D)::QAR1(A),XR(g)
    • R(g);XB(G)::S(E),XR(g)
    • S(a);N_GUARD::QAB1(A),XP(c)
    • S(b);N_GUARD::S(E)
    • S(b);N_GUARD::S(E),XS(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(a);N_GUARD::QAB(A)
      • S(a);N_GUARD::QAB(A),XS(a)
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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).