MESON Chess Problem Database

Problem Display
PID: 260719 (8/b1n5/2Q1p3/2p5/n1kp1pR1/B6K/1pP1PpN1/1N6 w - - 0 1)

Belli, Niccolo

Somma, Francesco

L'Alfiere di Re, 1925

8/b1n5/2Q1p3/2p5/n1kp1pR1/B6K/1pP1PpN1/1N6

#2

8 + 10

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Sd2#
    • 1...Sb6
      • 2.Qxc5#
    • 1...Sb5
      • 2.Qxe6#
    • 1...Sd5
      • 2.Qa6#
    • 1...d3
      • 2.Rxf4#
    • 1...f3
      • 2.Se3#
  • Tries
    • 1.Se3+?
      • 1...dxe3
        • 2.Rxf4#
      • 1...fxe3!
    • 1.Rg5?
      • threat
        • 2.Qxa4#
      • 1...Sc3
        • 2.Sd2#
      • 1...Sb6
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...Sb5
        • 2.Qxe6#
      • 1...Sd5
        • 2.Qa6#
      • 1...Sa6
        • 2.Qxa6#
      • 1...e5!
  • Keys
    • 1.e4!
      • threat
        • 2.Qxa4#
      • 1...dxe4 ep
        • 2.Rxf4#
      • 1...fxe4 ep
        • 2.Sxe3#
      • 1...Sc3
        • 2.Sd2#
      • 1...Sb6
        • 2.Qxc5#
      • 1...Sb5
        • 2.Qxe6#
      • 1...Sd5
        • 2.Qa6#
      • 1...Sa6
        • 2.Qxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(c);SBLOCK::S(A)
    • S(c);N_GUARD,S_CUTB(i)::QAR1(H),XP(g)
    • S(j);N_GUARD,SBLOCK::QAB(H),XP(h)
    • S(j);N_GUARD,SBLOCK::QAB(H)
    • P(e);N_SPINP(g),OGATEB,P_SPINP(f)::R(G),XP(f)
    • P(f);N_GUARD,N_SPINP(g),P_SPINP(e)::S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • P(e);N_SPINP(g),P_SPINP(f),XS(D)::R(G),XP(f)
      • Refutation
        • P(f);N_SPINP(g),P_SPINP(e),XS(D)
    • Try
      • R(G);
      • Threat
        • QAR2(H),XS(c)
      • Vars
        • S(c);SBLOCK::S(A)
        • S(j);N_GUARD,SBLOCK::QAB(H),XP(h)
        • S(j);N_GUARD::QAB(H)
        • S(j);N_GUARD::QAB(H),XS(j)
      • Refutation
        • P(h);
  • Actual
    • P(C);
    • Threat
      • QAR2(H),XS(c)
    • Vars
      • P(e);EP,N_SPINP(g),OGATEB,P_SPINP(f),XP(C)::R(G),XP(f)
      • P(f);EP,N_GUARD,N_SPINP(g),P_SPINP(e),XP(C)::S(D),XP(f)
      • S(c);SBLOCK::S(A)
      • S(c);N_GUARD,S_CUTB(i)::QAR1(H),XP(g)
      • S(j);N_GUARD,SBLOCK::QAB(H),XP(h)
      • S(j);N_GUARD::QAB(H)
      • S(j);N_GUARD::QAB(H),XS(j)
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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).