MESON Chess Problem Database

Problem Display
PID: 52020 (1K6/5N2/1B4p1/1N1k2p1/2p3B1/2Pp4/2Q5/1R5b w - - 0 1)

Shanshin, Valery Yurevich

4th Prize, Moscow Championship, 2000

1K6/5N2/1B4p1/1N1k2p1/2p3B1/2Pp4/2Q5/1R5b

#2

8 + 6

23 Die Schwalbe 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Qxg2#
  • Tries
    • 1.Sc7+?
      • 1...Kc6
        • 2.Qa4#
      • 1...Ke4!
    • 1.Qxd3+?
      • 1...Kc6
        • 2.Sa7#
        • 2.Qd6#
      • 1...cxd3!
    • 1.Qa2?
      • threat
        • 2.Qa8#
      • 1...Ke4
        • 2.Qxc4#
      • 1...Kc6!
    • 1.Qf2?
      • 1...Ke4
        • 2.Qd4#
      • 1...Kc6
        • 2.Qc5#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Be4
        • 2.Qc5#
      • 1...d2!
    • 1.Qh2?
      • threat
        • 2.Qxh1#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc6
        • 2.Qd6#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Be4
        • 2.Qd6#
      • 1...Bf3!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qa8#
      • 1...Ke4
        • 2.Qxc4#
      • 1...Kc6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB(B),XB(a)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB(B)
      • Refutation
        • K(d);P_SPINP(b),S_FLIGHT
    • Try
      • Q(B);CHECK,XP(b)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);P_PINP(c)
      • Threat
        • QAB(B)
      • Vars
        • K(d);N_SPINP(c),S_FLIGHT::QAR2(B),XP(c)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(d);S_FLIGHT::QAR1(B)
        • B(a);N_GUARD::QAB(B),XB(a)
        • B(a);SBLOCK::QAR1(B)
      • Refutation
        • P(b);
    • Try
      • Q(B);
      • Threat
        • QAB(B),XB(a)
      • Vars
        • K(d);S_FLIGHT::QAR1(B)
        • B(a);N_GUARD::QAB(B),XB(a)
        • B(a);SBLOCK::QAR1(B)
      • Refutation
        • B(a);
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • K(d);P_SPINP(c),S_FLIGHT::QAR2(B),XP(c)
      • K(d);S_FLIGHT::QAB(B)+S(E)
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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).