MESON Chess Problem Database

Problem Display
PID: 194020 (4N3/5K2/2pP4/3kp1Q1/6P1/1P2Pp2/2P2P2/8 w - - 0 1)

Belli, Nicolo

L'Italia Scacchistica, 1917

4N3/5K2/2pP4/3kp1Q1/6P1/1P2Pp2/2P2P2/8

#2

9 + 4

6490 yacpdb 2019
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sf6#
  • Tries
    • 1.Sc7+?
      • 1...Ke4
        • 2.Qf5#
        • 2.Qg6#
      • 1...Kxd6
        • 2.Qe7#
      • 1...Kc5!
    • 1.Qe7?
      • 1...Ke4
        • 2.Sf6#
      • 1...c5
        • 2.Qb7#
      • 1...e4
        • 2.Qg5#
      • 1...Kc5!
    • 1.c4+?
      • 1...Ke4
        • 2.Qf5#
        • 2.Qg6#
      • 1...Kc5!
  • Keys
    • 1.Qd8!
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc5
        • 2.Qa5#
      • 1...c5
        • 2.Qa8#
      • 1...e4
        • 2.Qg5#

Anticipated by 4579(1880)

This anticipates 231268(1927)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(c),S_FLIGHT::S(I)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT,XP(G)::QAB1(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(F);N_PINP(c)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::S(I)
        • P(d);OGATEB,SBLOCK::QAB(F)
        • P(c);OGATEB,SBLOCK::QAR(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(A);CHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(F);N_PINP(c)
    • Vars
      • K(b);S_FLIGHT::S(I)
      • K(b);P-FLIGHT::QAR2(F)
      • P(d);OGATEB,SBLOCK::QAB(F)
      • P(c);OGATEB,SBLOCK::QAR(F)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).