MESON Chess Problem Database

Problem Display
PID: 175734 (8/4B3/p3pP2/1B1kpP2/2ppN2r/K1R4q/P1b1R1Q1/3rnn2 w - - 0 1)

Vianna, Joao Caldas

Caissana Brasileira, 1898

8/4B3/p3pP2/1B1kpP2/2ppN2r/K1R4q/P1b1R1Q1/3rnn2

#2

10 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc3+
      • 2.Sxc3#
    • 1...exf5
      • 2.Qg8#
  • Tries
    • 1.Qg8?
      • threat
        • 2.Qxe6#
        • 2.Qa8#
        • 2.Qd8#
      • 1...Qxf5
        • 2.Qa8#
        • 2.Qd8#
      • 1...dxc3
        • 2.Qd8#
      • 1...axb5
        • 2.Qxe6#
        • 2.Qa8#
      • 1...Qe3
        • 2.Qa8#
      • 1...Se3
        • 2.Qa8#
      • 1...d3
        • 2.Qd8#
      • 1...Rh8
        • 2.Qxe6#
      • 1...Qxc3+!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Sc3#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...exf5
        • 2.Qg8#
      • 1...c3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(e);CHECK,XR(E)::QAB(C)+S(F),DCHECK,XQ(e)
    • P(l);OGATEB,XP(H)::QAB(C)
  • Tries
    • Try
      • Q(C);P_PINP(l)
      • Threat
        • DUALS(3)
      • Vars
        • P(g);XR(E)::QAR(C)
        • Q(e);::QAB(C)
        • S(c);N_PINR(E)::QAB(C)
        • P(g);N_PINR(E)::QAR(C)
        • R(h);::QAB1(C),XP(l)
      • Refutation
        • Q(e);CHECK,XR(E)
  • Actual
    • R(E);P_PINP(g)
    • Threat
      • QAB(C)+S(F),DCHECK
    • Vars
      • R(h);OGATE,P_SPINR(h),XS(F)::QAB1(C),XR(h)
      • P(l);OGATEB,XP(H)::QAB(C)
      • P(f);N_PINR(E)::QAB(C)+S(F),DCHECK,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).