MESON Chess Problem Database

Problem Display
PID: 44800 (4B3/4p2p/3Pk1P1/1K4B1/3Q4/8/4p3/6R1 w - - 0 1)

Semenenko, Aleksandr

1st Prize, Lokker MT, 2000

4B3/4p2p/3Pk1P1/1K4B1/3Q4/8/4p3/6R1

#2

7 + 4

56 The Problemist 2002

SOLUTION

  • SOUND
  • Sets
    • 1...exd6
      • 2.Qe4#
  • Tries
    • 1.Kc6?
      • threat
        • 2.Bd7#
        • 2.Qe4#
        • 2.Qd5#
      • 1...hxg6
        • 2.Qe4#
        • 2.Qd5#
      • 1...e1Q
        • 2.Bd7#
        • 2.Qd5#
      • 1...e1R
        • 2.Bd7#
        • 2.Qd5#
      • 1...Kf5!
    • 1.Bf7+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kd7!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Bc6#
      • 1...exf6!
    • 1.dxe7?
      • threat
        • 2.Bd7#
      • 1...Kf5
        • 2.Qd5#
      • 1...hxg6!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Qd5#
      • 1...Kf5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(c);SBLOCK,XP(E)::QAR2(B)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(3)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(G);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::B(G)
      • Refutation
        • P(c);XQ(B)
    • Try
      • P(E);XP(c)
      • Threat
        • B(G)
      • Vars
        • K(b);S_FLIGHT::QAR2(B)
      • Refutation
        • P(d);XP(F)
  • Actual
    • B(G);
    • Threat
      • QAB1(B)
    • Vars
      • K(b);S_FLIGHT::QAB1(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).