MESON Chess Problem Database

Problem Display
PID: 205786 (6N1/2P1r1r1/Q2p1Rp1/2pknn1R/5B2/2P2Pp1/8/1K6 w - - 0 1)

Belli, Nicolo

L'Alfiere di Re, 1925

6N1/2P1r1r1/Q2p1Rp1/2pknn1R/5B2/2P2Pp1/8/1K6

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Rxd6#
    • 1...Sc4
      • 2.Qb7#
      • 2.Qa8#
    • 1...Sg4
      • 2.Rxd6#
    • 1...Sc6
      • 2.Rxd6#
    • 1...Sd7
      • 2.Rxd6#
    • 1...Sf7
      • 2.Sxe7#
    • 1...Se3
      • 2.Rxd6#
    • 1...Sd4
      • 2.Rxd6#
      • 2.c4#
    • 1...Sh4
      • 2.Rxd6#
    • 1...Sh6
      • 2.Rxd6#
    • 1...c4
      • 2.Qb5#
  • Tries
    • 1.Sxe7+?
      • 1...Sxe7
        • 2.Rxd6#
      • 1...Rxe7!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qe4#
      • 1...Sxf3
        • 2.Rxd6#
      • 1...c4
        • 2.Qb5#
      • 1...Sd3
        • 2.Rxd6#
      • 1...Sc4
        • 2.Qa8#
      • 1...Sg4
        • 2.Rxd6#
      • 1...Sc6
        • 2.Rxd6#
      • 1...Sd7
        • 2.Rxd6#
      • 1...Sf7
        • 2.Sxe7#
      • 1...Sd4
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(d);P_SPINS(e)::R1(G),XP(f)
    • S(d);P_SPINS(e),S_CUTR(i)::S(I),XR(h)
    • S(e);N_GUARD,P_SPINS(d)::R1(G),XP(f)
    • P(b);OGATEB::QAR2(F)
  • Tries
    • Try
      • S(I);CHECK,XR(h)
      • Vars
        • S(e);P_SPINS(d),XS(I)::R1(G),XP(f)
      • Refutation
        • R(i);XS(I)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • S(d);P_SPINS(e),XP(C)::R1(G),XP(f)
      • P(b);OGATEB::QAR2(F)
      • S(d);P_SPINS(e)::R1(G),XP(f)
      • S(d);N_GUARD,P_SPINS(e),SBLOCK::QAB(F)
      • S(d);P_SPINS(e),S_CUTR(i)::S(I),XR(h)
      • S(e);P_SPINS(d),SBLOCK::P(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).