MESON Chess Problem Database

Problem Display
PID: 132137 (3BB3/6R1/k4qRr/8/1p2p2b/8/1Q6/K7 w - - 0 1)

Casa, Alex

1st HM., Arbejder-Skak, 1953/I

3BB3/6R1/k4qRr/8/1p2p2b/8/1Q6/K7

#2

6 + 6

1355 The Guardian 1970
274 diagrammes 1974
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Qa2#
    • 1...Qc6
      • 2.Qe2#
    • 1...Qd6
      • 2.Qa2#
      • 2.Qe2#
    • 1...Qe6
      • 2.Qa2#
      • 2.Qe2#
    • 1...Qxg6
      • 2.Qa2#
      • 2.Qe2#
    • 1...Be1
      • 2.Qxf6#
  • Tries
    • 1.Kb1?
      • threat
        • 2.Qa1#
        • 2.Qa2#
        • 2.Qe2#
      • 1...Rxg6
        • 2.Qa2#
        • 2.Qe2#
      • 1...Qb6
        • 2.Qa1#
        • 2.Qa2#
      • 1...Qc6
        • 2.Qe2#
      • 1...b3
        • 2.Qa1#
        • 2.Qa3#
        • 2.Qe2#
      • 1...Rh5!
    • 1.Rxf6+?
      • 1...Rxf6
        • 2.Qa2#
        • 2.Qe2#
      • 1...Bxf6!
    • 1.Qd4?
      • threat
        • 2.Ra7#
      • 1...Qb6
        • 2.Qxb6#
      • 1...Qc6
        • 2.Qc4#
      • 1...Rh7!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Bb5#
      • 1...Qb6
        • 2.Qb5#
      • 1...Qc6
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(e);N_PINQ(B)::QAR(B)
    • Q(e);N_PINQ(B)::QAB(B)
    • B(c);N_GUARD::QAR(B),XQ(e)
  • Tries
    • Try
      • K(A);N_SPINQ(B),P-FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • Q(e);::QAB(B)
      • Refutation
        • R(f);
    • Try
      • R(C);CHECK,N_SPINQ(B),XQ(e)
      • Refutation
        • B(c);P_PINQ(B),XR(C)
    • Try
      • Q(B);
      • Threat
        • R1(D)
      • Vars
        • Q(e);N_PINQ(B)::QAR1(B),XQ(e)
        • Q(e);N_PINQ(B)::QAB(B)
      • Refutation
        • R(f);
  • Actual
    • Q(B);
    • Threat
      • B(F)
    • Vars
      • Q(e);N_PINQ(B)::QAB1(B)
      • Q(e);N_PINQ(B)::QAR1(B)
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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).