MESON Chess Problem Database

Problem Display
PID: 201431 (8/n3N2p/7P/2PPkp2/1p2p2Q/1P1pN1PK/1P1n2p1/6Bb w - - 0 1)

Gross, J

L'Alfiere di Re, 1922

8/n3N2p/7P/2PPkp2/1p2p2Q/1P1pN1PK/1P1n2p1/6Bb

#2

11 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Sc4#
    • 1...Sb1
      • 2.Sc4#
    • 1...Sf1
      • 2.Sc4#
    • 1...Sxb3
      • 2.Sc4#
    • 1...Sf3
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sb5
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sc8
      • 2.Sc6#
    • 1...f4
      • 2.Sg4#
  • Tries
    • 1.Qf4+?
      • 1...Kd4
        • 2.Sd1#
        • 2.Sf1#
        • 2.Sc2#
        • 2.Sxg2#
        • 2.Sc4#
        • 2.Sg4#
        • 2.S3xf5#
      • 1...Kf6!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qg7#
      • 1...fxg4+
        • 2.Sxg4#
      • 1...Kd4
        • 2.Sc4#
      • 1...Kf6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • K(g);P_SPINP(f),S_FLIGHT::B(A)+S(D)
    • S(b);N_GUARD::S(D)
    • S(b);N_GUARD,XP(C)::S(D)
    • S(b);N_GUARD::S(D),XS(b)
    • S(i);N_GUARD::S(K)
    • S(i);N_GUARD::S(K),XS(i)
    • P(h);N_GUARD::S(D)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • K(g);P_SPINP(h),S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • P(h);CHECK,XQ(G)::S(D),XP(h)
      • K(g);P_SPINP(f),S_FLIGHT::B(A)+S(D)
      • K(g);S_FLIGHT::QAB1(G)
HTML5 logo

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).