MESON Chess Problem Database

Problem Display
PID: 201384 (2nNrb2/pP1pk1p1/Rp1N2p1/BP4p1/6p1/6K1/5Q2/8 w - - 0 1)

Bettelini, O

L'Alfiere di Re, 1922

2nNrb2/pP1pk1p1/Rp1N2p1/BP4p1/6p1/6K1/5Q2/8

#2

8 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qf7+?
      • 1...Kxd8
        • 2.bxc8Q#
        • 2.bxc8R#
      • 1...Kxd6!
    • 1.bxc8Q?
      • 1...Kxd6
        • 2.Qfc5#
        • 2.Qcc5#
      • 1...bxa5
        • 2.Qf7#
      • 1...Rxd8!
    • 1.bxc8R?
      • 1...Kxd6
        • 2.Qc5#
      • 1...bxa5
        • 2.Qf7#
      • 1...Rxd8!
  • Keys
    • 1.Qc5!
      • 1...Kf6
        • 2.Sxe8#
      • 1...Kxd8
        • 2.Sf7#
      • 1...Rxd8
        • 2.Qe5#
      • 1...Sxd6
        • 2.Qxg5#
      • 1...bxa5
        • 2.Qxg5#
      • 1...bxc5
        • 2.Sxc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(g);P_SPINP(c),S_FLIGHT,XS(H)::PXS(i)=Q
      • Refutation
        • K(g);P_SPINP(c),S_FLIGHT,XS(F)
    • Try
      • P(G);XS(i)
      • Vars
        • P(c);XB(C)::QAR1(A)
      • Refutation
        • R(j);XS(H)
    • Try
      • P(G);XS(i)
      • Vars
        • K(g);OGATEB,P_SPINP(c),S_FLIGHT,XS(F)::QAB1(A)
        • P(c);XB(C)::QAR1(A)
      • Refutation
        • R(j);XS(H)
  • Actual
    • Q(A);
    • Vars
      • K(g);S_FLIGHT::S(F),XR(j)
      • K(g);P_SPINP(c),S_FLIGHT,XS(H)::S(F)
      • R(j);SBLOCK,XS(H)::QAR2(A)
      • S(i);P_SPINS(i),SBLOCK,XS(F)::QAB(A),XP(b)
      • P(c);XB(C)::QAB(A),XP(b)
      • P(c);XQ(A)::S(F),XS(i)
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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).