MESON Chess Problem Database

Problem Display
PID: 118354 (3Qn3/2bR1N2/1q1PP1p1/pP1N4/R1Bk2r1/BP1P4/3K2p1/3b4 w - - 0 1)

Rasmussen, Knud AK

Toronto Telegram, 1947

3Qn3/2bR1N2/1q1PP1p1/pP1N4/R1Bk2r1/BP1P4/3K2p1/3b4

#2

13 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Bb2#
    • 1...Bxb3
      • 2.Bxb3#
    • 1...Bb8
      • 2.Qxb6#
    • 1...Sxd6
      • 2.Qf6#
      • 2.Qh8#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sg7
      • 2.Qf6#
  • Tries
    • 1.Sxb6?
      • threat
        • 2.Bd5#
      • 1...Bxb3
        • 2.Bxb3#
      • 1...Bxb6
        • 2.Qxb6#
      • 1...Sxd6
        • 2.Qf6#
        • 2.Qh8#
      • 1...Bxd6!
  • Keys
    • 1.Se7!
      • threat
        • 2.Bd5#
      • 1...Qxb5
        • 2.Bxb5#
      • 1...Qxd6
        • 2.Sc6#
      • 1...Bxb3
        • 2.Bxb3#
      • 1...Bxd6
        • 2.Qxb6#
      • 1...Sxd6
        • 2.Qh8#
      • 1...Qc5
        • 2.Bb2#
      • 1...Qc6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(f);SBLOCK::B(B)
    • B(a);OGATE,XP(C)::R(E)+B(F),XB(a)
    • B(h);OGATE::QAB(M),XQ(f)
    • S(i);N_GUARD::QAB(M),XS(i)
    • S(i);N_GUARD::QAB(M)
  • Tries
    • Try
      • S(H);XQ(f)
      • Threat
        • R(E)+B(F)
      • Vars
        • B(a);OGATE,XP(C)::R(E)+B(F),XB(a)
        • B(h);OGATE,XS(H)::QAB(M),XB(h)
      • Refutation
        • B(h);P_SPINB(h),XP(I)
  • Actual
    • S(H);
    • Threat
      • R(E)+B(F)
    • Vars
      • Q(f);OGATE,XP(G)::R(E)+B(F),XQ(f)
      • Q(f);N_GUARD,P_SPINQ(f),XP(I)::S(H)
      • B(a);OGATE,XP(C)::R(E)+B(F),XB(a)
      • B(h);OGATE,P_SPINB(h),XP(I)::QAB(M),XQ(f)
      • S(i);OGATE,P_SPINS(i),XP(I)::QAB(M)
      • Q(f);SBLOCK::B(B)
      • Q(f);N_GUARD::S(H),XQ(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).