MESON Chess Problem Database

Problem Display
PID: 109893 (3n1bK1/r3P3/1B1kP1N1/3r1p2/4P3/1Q2n3/8/7B w - - 0 1)

Carlos, Renato

O Globo, 1933

3n1bK1/r3P3/1B1kP1N1/3r1p2/4P3/1Q2n3/8/7B

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.e5#
    • 1...Rd2
      • 2.e5#
    • 1...Rd3
      • 2.e5#
    • 1...Rd4
      • 2.e5#
    • 1...Sd1
      • 2.Qxd5#
    • 1...Sf1
      • 2.Qxd5#
    • 1...Sc2
      • 2.Qxd5#
    • 1...Sg2
      • 2.Qxd5#
    • 1...Sg4
      • 2.Qxd5#
  • Tries
    • 1.exd5?
      • threat
        • 2.Qb4#
        • 2.e8S#
      • 1...Rxe7
        • 2.Qa3#
        • 2.Qb4#
      • 1...Bxe7
        • 2.Qb4#
      • 1...Sxd5
        • 2.Qxd5#
      • 1...Ra4
        • 2.exd8Q#
        • 2.exd8R#
        • 2.exf8Q#
        • 2.exf8B#
        • 2.e8S#
      • 1...Ra5
        • 2.exd8Q#
        • 2.exd8R#
        • 2.exf8Q#
        • 2.exf8B#
        • 2.e8S#
      • 1...Rc7
        • 2.e8S#
      • 1...Sc2
        • 2.e8S#
      • 1...Sg2
        • 2.e8S#
      • 1...Sc6
        • 2.e8S#
      • 1...Sb7
        • 2.exf8Q#
        • 2.exf8B#
        • 2.e8S#
      • 1...Sxe6!
  • Keys
    • 1.e5+!
      • 1...Kc6
        • 2.exd8S#
      • 1...Kxe6
        • 2.exf8S#
      • 1...Rxe5
        • 2.e8S#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(b);N_GUARD::P(C)
    • S(a);N_GUARD::QAR1(B),XR(b)
  • Tries
    • Try
      • P(C);XR(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(g);XP(G)::QAB(B)
        • S(a);OGATE,XP(C)::QAR1(B),XS(a)
        • R(e);::P=S
        • S(a);::P=S
        • S(f);::P=S
      • Refutation
        • S(f);XP(E)
  • Actual
    • P(C);CHECK
    • Vars
      • K(d);P-FLIGHT,P_SPINR(b)::PXS(f)=S
      • K(d);P-FLIGHT,P_SPINR(b),XP(E)::PXB(g)=S
      • R(b);N_GUARD,XP(C)::P=S
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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).