MESON Chess Problem Database

Problem Display
PID: 100955 (1R1n4/1b3p2/p1Qpr3/4pr2/Pk2Np1q/1Np1p3/R6p/Bn1Bb2K w - - 0 1)

Fontana, Alessandro

Good Companions, 1920

1R1n4/1b3p2/p1Qpr3/4pr2/Pk2Np1q/1Np1p3/R6p/Bn1Bb2K

#2

9 + 16

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Bxc3#
      • 2.Qxc3#
    • 1...a5
      • 2.Qb5#
    • 1...d5
      • 2.Qc5#
  • Tries
    • 1.Qxb7+?
      • 1...Kc4
        • 2.Be2#
      • 1...Sxb7!
    • 1.Qxd6+?
      • 1...Kc4
        • 2.Sa5#
      • 1...Rxd6!
  • Keys
    • 1.Sed2!
      • threat
        • 2.Qe4#
      • 1...Sxd2
        • 2.Bxc3#
      • 1...Sxc6
        • 2.Rxb7#
      • 1...Sa3
        • 2.Bxc3#
      • 1...f3
        • 2.Qb6#
      • 1...e4
        • 2.Qc4#
      • 1...d5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(k);N_GUARD::QAR1(H)
    • P(l);N_GUARD::QAB1(H)
  • Tries
    • Try
      • Q(H);CHECK,XB(n)
      • Vars
        • K(f);P-FLIGHT::B(B)
      • Refutation
        • S(p);P_SPINS(p),XQ(H)
    • Try
      • Q(H);CHECK,P_SPINS(G),XP(l)
      • Vars
        • K(f);N_SPINB(n),P-FLIGHT::S(E)
      • Refutation
        • R(m);XQ(H)
  • Actual
    • S(G);P_SPINQ(H)
    • Threat
      • QAR(H)
    • Vars
      • S(a);N_GUARD,XS(G)::B(A),XP(d)
      • S(p);N_GUARD,XQ(H)::R(I),XB(n)
      • S(a);N_GUARD::B(A),XP(d)
      • P(g);N_PINQ(H)::QAR2(H)
      • P(i);N_PINQ(H)::QAR1(H)
      • P(l);N_PINQ(H)::QAB1(H)
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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).