MESON Chess Problem Database

Problem Display
PID: 194018 (8/5Q2/6p1/1N4K1/1p2k1p1/2p1p1P1/2P1n1bP/2nB2b1 w - - 0 1)

Belli, Nicolo

L'Italia Scacchistica, 1917

8/5Q2/6p1/1N4K1/1p2k1p1/2p1p1P1/2P1n1bP/2nB2b1

#2

7 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Qe6#
    • 1...Sxg3
      • 2.Qe6#
  • Tries
    • 1.Qc4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Ke5!
    • 1.Qxg6+?
      • 1...Kf3
        • 2.Qf5#
      • 1...Ke5
        • 2.Qf5#
      • 1...Kd5!
  • Keys
    • 1.Kf6!
      • threat
        • 2.Qb7#
      • 1...Kf3
        • 2.Ke5#
      • 1...Sxg3
        • 2.Qc4#
      • 1...Sd4
        • 2.Sd6#
      • 1...Sf4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(d);SBLOCK::QAR2(G)
    • S(c);XP(D)::QAR2(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(h);OGATE,P_SPINS(c),S_FLIGHT::QAR1(G)
        • S(c);N_GUARD,P_SPINS(c)::QAR1(G),XS(c)
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • Q(G);CHECK,XP(j)
      • Vars
        • K(h);P_SPINS(c),S_FLIGHT::QAR2(G)
        • K(h);P-FLIGHT::QAR1(G)
      • Refutation
        • K(h);S_FLIGHT
  • Actual
    • K(F);S_FLIGHT
    • Threat
      • QAB(G)
    • Vars
      • K(h);P_SPINS(c),S_FLIGHT::QAR(G)+K(F)
      • S(c);N_GUARD,XP(D)::QAR2(G)
      • S(c);SBLOCK::S(E)
      • S(c);N_GUARD::QAR2(G)
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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).