MESON Chess Problem Database

Problem Display
PID: 114194 (4KNn1/1Q2n3/5p1r/2P1k3/R1p3pR/3pB2q/b3N1P1/8 w - - 0 1)

Stocchi, Ottavio

Stadion, 1951

4KNn1/1Q2n3/5p1r/2P1k3/R1p3pR/3pB2q/b3N1P1/8

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Bf4#
    • 1...c3
      • 2.Qe4#
    • 1...g3
      • 2.Qe4#
    • 1...f5
      • 2.Bd4#
  • Tries
    • 1.Sd7+?
      • 1...Ke6
        • 2.Sd4#
        • 2.Qe4#
      • 1...Kf5!
    • 1.Qc6?
      • threat
        • 2.Qe6#
      • 1...Kf5
        • 2.Qe6#
      • 1...c3
        • 2.Qe4#
      • 1...g3
        • 2.Qe4#
      • 1...f5
        • 2.Sd7#
        • 2.Bd4#
        • 2.Bf4#
      • 1...Sxc6!
    • 1.Qc7+?
      • 1...Kd5
        • 2.Sc3#
      • 1...Kf5
        • 2.Qf4#
      • 1...Ke4!
    • 1.Qxe7+?
      • 1...Kd5
        • 2.Qe6#
      • 1...Kf5
        • 2.Sd4#
        • 2.Qe6#
      • 1...Sxe7!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Qe6#
      • 1...f5
        • 2.Qd4#
      • 1...c3
        • 2.Bf4#
      • 1...g3
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(i);SBLOCK::B(C)
    • P(d);::QAR1(G)
    • P(e);::QAR1(G)
    • P(g);SBLOCK::B(C)
  • Tries
    • Try
      • S(I);CHECK
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(f);P-FLIGHT::QAB1(G)
        • P(d);::QAR1(G)
        • P(e);::QAR1(G)
      • Refutation
        • S(i);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);P-FLIGHT::S(A)
        • K(f);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • K(f);P-FLIGHT,P_SPINP(d)
    • Try
      • Q(G);CHECK,XS(i)
      • Vars
        • K(f);P-FLIGHT::QAB1(G)
      • Refutation
        • S(j);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • K(f);P-FLIGHT,P_SPINP(d)::QAR2(G)
      • P(g);SBLOCK::QAB1(G)
      • P(d);::B(C)
      • P(e);::B(C)
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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).