MESON Chess Problem Database

Problem Display
PID: 270521 (5R2/K2Q1b1r/B6p/1Np5/3PkNP1/1Pr5/3ppP2/1q6 w - - 0 1)

Sammelius, Carel Johan Robert

Probleemblad, 1951

5R2/K2Q1b1r/B6p/1Np5/3PkNP1/1Pr5/3ppP2/1q6

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Qf5#
    • 1...Bh5
      • 2.Bb7#
    • 1...Bg6
      • 2.Bb7#
    • 1...Be8
      • 2.Bb7#
  • Tries
    • 1.Bb7+?
      • 1...Bd5
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...Kxf4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qf5#
      • 1...Kxd3
        • 2.Qf5#
      • 1...Kf3
        • 2.Bb7#
      • 1...Bxb3
        • 2.Sxc3#
      • 1...Bc4
        • 2.Sxc5#
      • 1...Bd5
        • 2.Qxh7#
      • 1...Bh5
        • 2.Sxc3#
      • 1...Be6
        • 2.Sxc3#
      • 1...Bg6
        • 2.Sxc3#
      • 1...Be8
        • 2.Sxc3#
      • 1...Bg8
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(d);SBLOCK::QAB1(I)
    • B(h);N_GUARD,P_PINQ(I)::B(G)
  • Tries
    • Try
      • B(G);CHECK
      • Refutation
        • K(e);P-FLIGHT,P_SPINB(h),XS(D)
  • Actual
    • S(D);
    • Threat
      • QAB1(I)
    • Vars
      • K(e);S_FLIGHT,XS(D)::QAB(I)
      • K(e);N_GUARD,P_SPINB(h),S_FLIGHT::B(G)
      • B(h);P_PINQ(I),XP(B)::S(F),XR(d)
      • B(h);P_PINQ(I),S_CUTR(d)::S(D),XP(f)
      • B(h);OGATE,P_PINQ(I),SBLOCK::QAB(I),XR(i)
      • B(h);P_PINQ(I)::S(F),XR(d)
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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).