MESON Chess Problem Database

Problem Display
PID: 198713 (K7/2pBp3/1p2Pp2/n2k2NR/QB3p2/1P2p2b/3N4/3R3q w - - 0 1)

Fontana, Alessandro

L'Italia Scacchistica, 1921

K7/2pBp3/1p2Pp2/n2k2NR/QB3p2/1P2p2b/3N4/3R3q

#2

10 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4+
      • 2.Sdf3#
    • 1...Ke5+
      • 2.Sgf3#
    • 1...Qf3
      • 2.Sdxf3#
  • Tries
    • 1.Sgf3+?
      • 1...Bf5
        • 2.Rxf5#
      • 1...f5!
    • 1.Qb5+?
      • 1...Kd4+
        • 2.Sdf3#
      • 1...c5!
    • 1.Qc6+?
      • 1...Kd4
        • 2.Sdf3#
      • 1...Ke5
        • 2.Sgf3#
      • 1...Sxc6!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qd4#
      • 1...Kc5+
        • 2.Sge4#
      • 1...Kd6+
        • 2.Sde4#
      • 1...Sxb3
        • 2.Qc6#
      • 1...Qe4
        • 2.Sdxe4#
      • 1...Sc4
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...c5
        • 2.Sf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • K(f);CHECK,P-FLIGHT::R(A)+S(B),DCHECK
    • K(f);CHECK,P-FLIGHT::R(G)+S(F),DCHECK
    • Q(a);N_GUARD::R(A)+S(B),XQ(a)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::R(G),XB(c)
      • Refutation
        • P(h);P_SPINP(h)
    • Try
      • Q(D);CHECK
      • Vars
        • K(f);CHECK,P-FLIGHT::R(A)+S(B),DCHECK
      • Refutation
        • P(i);P_SPINP(i)
    • Try
      • Q(D);CHECK
      • Vars
        • K(f);P-FLIGHT,P_PINQ(D)::R(A)+S(B),DCHECK
        • K(f);P-FLIGHT,P_PINQ(D)::R(G)+S(F),DCHECK
      • Refutation
        • S(e);XQ(D)
  • Actual
    • B(E);
    • Threat
      • QAR1(D)
    • Vars
      • K(f);CHECK,P-FLIGHT::R(G)+S(F),DCHECK
      • K(f);CHECK,P-FLIGHT::R(A)+S(B),DCHECK
      • S(e);N_GUARD,XP(C)::QAB1(D)
      • Q(a);N_GUARD::R(A)+S(B),XQ(a)
      • S(e);N_GUARD::QAB1(D)
      • S(e);N_GUARD::QAB1(D),XS(e)
      • P(i);SBLOCK::R(A)+S(B)
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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).