MESON Chess Problem Database

Problem Display
PID: 214656 (3n3N/4K2b/1Pp1B3/2p1kpP1/1pR5/R1q3P1/6QN/6n1 w - - 0 1)

Dunnica, RF

The Sunny South, 1878

3n3N/4K2b/1Pp1B3/2p1kpP1/1pR5/R1q3P1/6QN/6n1

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Re3#
    • 1...Qb2
      • 2.Re3#
      • 2.Qxb2#
    • 1...Qe3
      • 2.Rxe3#
    • 1...Bg6
      • 2.Sxg6#
    • 1...Bg8
      • 2.Sg6#
    • 1...Sxe6
      • 2.Sf7#
    • 1...Sb7
      • 2.Sf7#
    • 1...Sf7
      • 2.Sxf7#
    • 1...f4
      • 2.Sg4#
      • 2.gxf4#
  • Tries
    • 1.Raxc3?
      • threat
        • 2.Re3#
      • 1...f4
        • 2.Sg4#
        • 2.gxf4#
      • 1...bxc3!
    • 1.Qb2?
      • 1...Qxb2
        • 2.Re3#
      • 1...bxa3
        • 2.Qxc3#
      • 1...Qd4
        • 2.Re3#
      • 1...Bg6
        • 2.Sxg6#
      • 1...Bg8
        • 2.Sg6#
      • 1...Se2
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sh3
        • 2.Sf3#
      • 1...Sb7
        • 2.Sf7#
      • 1...Sf7
        • 2.Sxf7#
      • 1...b3
        • 2.Qxc3#
      • 1...f4
        • 2.Sg4#
        • 2.gxf4#
      • 1...Sxe6!
    • 1.Qe2+?
      • 1...Qe3
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Sxe2!
  • Keys
    • 1.Qe4+!
      • 1...fxe4
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(b);OGATE::R(C)
    • Q(b);OGATE::R(C),XQ(b)
    • B(h);N_GUARD::S(J),XB(h)
    • B(h);N_GUARD::S(J)
    • S(i);N_GUARD,XB(H)::S(J)
    • S(i);N_GUARD::S(J)
    • S(i);N_GUARD::S(J),XS(i)
  • Tries
    • Try
      • R(C);XQ(b)
      • Threat
        • R(C)
      • Refutation
        • P(c);XR(C)
    • Try
      • Q(A);P_PINQ(b)
      • Vars
        • Q(b);N_SPINQ(b),OGATE,XQ(A)::R(C)
        • P(c);N_GUARD,XR(C)::QAB(A),XQ(b)
        • Q(b);OGATE::R(C)
        • B(h);N_GUARD::S(J),XB(h)
        • B(h);N_GUARD::S(J)
        • S(a);N_GUARD::S(B)
        • S(a);N_GUARD::S(B),XS(a)
        • S(i);N_GUARD::S(J)
        • S(i);N_GUARD::S(J),XS(i)
        • P(c);N_GUARD::QAB(A),XQ(b)
      • Refutation
        • S(i);XB(H)
    • Try
      • Q(A);CHECK
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • P(f);XQ(A)::S(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).