MESON Chess Problem Database

Problem Display
PID: 224249 (K7/8/Q2pPN2/2kp2N1/2rn4/1Bp5/1nP5/3R4 w - - 0 1)

Valle, Giovanni Batista

Fanfulla da Lodi, 1887

K7/8/Q2pPN2/2kp2N1/2rn4/1Bp5/1nP5/3R4

#2

8 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Sd7#
  • Tries
    • 1.Sge4+?
      • 1...Kb4
        • 2.Sxd5#
      • 1...dxe4!
  • Keys
    • 1.Sxd5!
      • 1...Kxd5
        • 2.Qb5#
      • 1...Sxd1
        • 2.Qxc4#
      • 1...Sxc2
        • 2.Qb6#
      • 1...Sxb3
        • 2.Qb6#
      • 1...Sxe6
        • 2.Sxe6#
        • 2.Qb6#
      • 1...Ra4
        • 2.Se4#
      • 1...Rb4
        • 2.Se4#
      • 1...Sd3
        • 2.Qxc4#
      • 1...Sa4
        • 2.Qxc4#
      • 1...Se2
        • 2.Qb6#
      • 1...Sf3
        • 2.Qb6#
      • 1...Sb5
        • 2.Qb6#
      • 1...Sf5
        • 2.Qb6#
      • 1...Sc6
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::S(G)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);S_FLIGHT::S(G),XP(f)
      • Refutation
        • P(f);XS(D)
  • Actual
    • S(G);XP(f)
    • Vars
      • K(e);P-FLIGHT,P_SPINR(c),P_SPINS(d),XS(G)::QAR2(E)
      • S(a);N_GUARD,XR(A)::QAR1(E),XR(c)
      • S(d);XP(B)::QAB1(E)
      • S(d);XB(C)::QAB1(E)
      • R(c);P_PINQ(E)::S(D)
      • R(c);::S(D)
      • S(a);N_GUARD::QAR1(E),XR(c)
      • S(d);::QAB1(E)
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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).