MESON Chess Problem Database

Problem Display
PID: 157832 (4n3/1r1pp3/qb1B1p1n/Rbp2k1p/1P2NN1p/1Q6/6R1/1B4K1 w - - 0 1)

Hartong, Jan

L'Alfiere di Re, 1922

4n3/1r1pp3/qb1B1p1n/Rbp2k1p/1P2NN1p/1Q6/6R1/1B4K1

#2

9 + 13

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7
      • 2.Qh3#
    • 1...Sg8
      • 2.Qh3#
    • 1...cxb4+
      • 2.Sf2#
    • 1...c4+
      • 2.Sf2#
      • 2.Sc5#
  • Tries
    • 1.Sg3+?
      • 1...Kg4
        • 2.Sf1#
        • 2.Sh1#
        • 2.Sge2#
        • 2.Sf5#
        • 2.Sgxh5#
      • 1...Kg5!
    • 1.Sxf6+?
      • 1...Kxf6
        • 2.Sxh5#
        • 2.Rg6#
      • 1...Bd3!
  • Keys
    • 1.Se6!
      • threat
        • 2.Qd5#
      • 1...cxb4+
        • 2.Sf2#
      • 1...c4+
        • 2.S4c5#
      • 1...dxe6
        • 2.Qf3#
      • 1...Bc4
        • 2.Sd4#
      • 1...Sg4
        • 2.Sg3#
      • 1...Bc6
        • 2.Sd4#
      • 1...Sf7
        • 2.Qh3#
      • 1...Sc7
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(i);N_GUARD::QAB(D)
    • P(c);CHECK,P_SPINB(b),XP(E)::B(A)+S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(F);CHECK,XP(h)
      • Refutation
        • B(b);P_SPINB(b),P_SPINP(c)
  • Actual
    • S(G);
    • Threat
      • QAR2(D)
    • Vars
      • P(c);CHECK,P_SPINB(b),XP(E)::B(A)+S(F)
      • P(c);CHECK,P_SPINB(b)::B(A)+S(F)
      • P(k);SBLOCK,XS(G)::QAR2(D)
      • B(b);P_SPINP(c)::S(G)
      • S(i);SBLOCK::B(A)+S(F),DCHECK
      • S(i);N_GUARD::QAB(D)
      • S(m);N_GUARD::S(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).