MESON Chess Problem Database

Problem Display
PID: 198256 (n5b1/2R1Rp2/1p1p2p1/1Nbk2P1/B5p1/1P2ppK1/n2PP3/Q7 w - - 0 1)

Looijen, JW

Rivista del Club Argentino de Ajedrez, 1920

n5b1/2R1Rp2/1p1p2p1/1Nbk2P1/B5p1/1P2ppK1/n2PP3/Q7

#2

10 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qd4#
    • 1...Bb4
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Sxc7
      • 2.Sxc7#
    • 1...exd2
      • 2.e4#
    • 1...fxe2
      • 2.Qh1#
    • 1...f2
      • 2.Qh1#
  • Tries
    • 1.Sc3+?
      • 1...Kd4
        • 2.Re4#
        • 2.dxe3#
      • 1...Sxc3!
    • 1.Qc3?
      • threat
        • 2.Qc4#
      • 1...Sxc7
        • 2.Sxc7#
      • 1...Sxc3!
  • Keys
    • 1.Qh8!
      • 1...Sxc7
        • 2.Sxc7#
      • 1...exd2
        • 2.e4#
      • 1...fxe2
        • 2.Qh1#
      • 1...Bh7
        • 2.Qxa8#
      • 1...Ba3
        • 2.Qd4#
      • 1...Bb4
        • 2.Qd4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sb4
        • 2.Sc3#
      • 1...f2
        • 2.Qh1#
      • 1...f5
        • 2.Qxg8#
      • 1...f6
        • 2.Qxg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(e);N_GUARD::QAR1(A)
    • B(e);N_GUARD::QAR1(A),XB(e)
    • S(k);XR(I)::S(G),XS(k)
    • P(b);OGATE,XP(B)::P(C)
    • P(c);OGATEB,XP(C)::QAB(A)
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • S(a);XS(G)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(k);XR(I)::S(G),XS(k)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • S(k);XR(I)::S(G),XS(k)
      • P(b);OGATE,XP(B)::P(C)
      • P(c);OGATEB,XP(C)::QAB(A)
      • B(l);OGATE::QAB(A),XS(k)
      • B(e);N_GUARD::QAR1(A)
      • B(e);N_GUARD::QAR1(A),XB(e)
      • S(a);N_GUARD::S(G)
      • S(a);N_GUARD::S(G),XS(a)
      • P(c);OGATEB::QAB(A)
      • P(j);OGATEB::QAB(A),XB(l)
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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).