MESON Chess Problem Database

Problem Display
PID: 164401 (6b1/1K1Q2b1/3p4/3k2pB/1P4P1/1pPp1Pp1/6N1/2R2n2 w - - 0 1)

Bourd, Evgeny

Schach, 2001

6b1/1K1Q2b1/3p4/3k2pB/1P4P1/1pPp1Pp1/6N1/2R2n2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qc6#
    • 1...Ke5
      • 2.Qf5#
    • 1...Be6
      • 2.Qb5#
  • Tries
    • 1.Se3+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Sxe3!
    • 1.Sf4+?
      • 1...Kc4
        • 2.Qc6#
      • 1...Ke5
        • 2.Qf5#
      • 1...gxf4!
    • 1.Bf7+?
      • 1...Ke5
        • 2.Qf5#
        • 2.Qe6#
        • 2.Qe7#
      • 1...Bxf7!
    • 1.Qxd6+?
      • 1...Kc4
        • 2.Qc5#
        • 2.Qc6#
      • 1...Kxd6!
    • 1.Qf7+?
      • 1...Ke5
        • 2.Qf5#
      • 1...Bxf7!
    • 1.c4+?
      • 1...Kd4
        • 2.Qxg7#
      • 1...Ke5!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Qc6#
      • 1...Be6
        • 2.Qb5#
      • 1...Bd4
        • 2.c4#
      • 1...Be5
        • 2.Qxg8#
      • 1...Bh7
        • 2.Bf7#
      • 1...Sd2
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(e);N_SPINP(g),S_FLIGHT::QAR2(I)
    • K(e);N_SPINP(g),P-FLIGHT::QAR1(I)
    • B(i);SBLOCK::QAR2(I)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(e);N_SPINP(g),P-FLIGHT::QAR1(I)
      • Refutation
        • S(a);XS(B)
    • Try
      • S(B);CHECK
      • Vars
        • K(e);N_SPINP(g),S_FLIGHT::QAR2(I)
        • K(e);N_SPINP(g),P-FLIGHT::QAR1(I)
      • Refutation
        • P(f);XS(B)
    • Try
      • B(G);CHECK
      • Refutation
        • B(i);XB(G)
    • Try
      • Q(I);CHECK,XP(g)
      • Refutation
        • K(e);P-FLIGHT,XQ(I)
    • Try
      • Q(I);CHECK,N_PINP(g)
      • Vars
        • K(e);P-FLIGHT::QAR1(I)
      • Refutation
        • B(i);XQ(I)
    • Try
      • P(C);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB(I),XB(h)
      • Refutation
        • K(e);N_SPINP(g),P-FLIGHT
  • Actual
    • Q(I);N_PINP(g)
    • Threat
      • QAB1(I)
    • Vars
      • K(e);S_FLIGHT::QAR2(I)
      • B(i);SBLOCK::QAR2(I)
      • B(h);SBLOCK::P(C)
      • B(h);SBLOCK::QAB(I),XB(i)
      • B(i);N_GUARD::B(G)
      • S(a);N_GUARD::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).