MESON Chess Problem Database

Problem Display
PID: 278543 (2B2b2/1N6/6p1/1K1kp2r/2p1b2p/2p2p2/2p5/4R1Q1 w - - 0 1)

Erokhin, Vladimir Alekseevich

Stella Polaris, 1973

2B2b2/1N6/6p1/1K1kp2r/2p1b2p/2p2p2/2p5/4R1Q1

#2

5 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bh6
      • 2.Qc5#
    • 1...Bg7
      • 2.Qc5#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qxe4#
      • 1...Bf5
        • 2.Qxe5#
      • 1...Bd3!
    • 1.Qb6?
      • threat
        • 2.Be6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Bf5!
    • 1.Qf1?
      • threat
        • 2.Qxc4#
      • 1...Kd4
        • 2.Qxc4#
      • 1...Bd3!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qxe4#
      • 1...Kd4
        • 2.Qxe4#
      • 1...Bd3
        • 2.Be6#
      • 1...Bf5
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(k);N_GUARD::QAR1(B),XB(k)
    • B(k);N_GUARD::QAR1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XB(e)
      • Vars
        • B(e);OGATE::QAR1(B),XP(h)
      • Refutation
        • B(e);
    • Try
      • Q(B);
      • Threat
        • B(E)
      • Vars
        • B(k);N_GUARD::QAR1(B),XB(k)
      • Refutation
        • B(e);
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(d)
      • Vars
        • K(g);P-FLIGHT::QAR1(B),XP(d)
      • Refutation
        • B(e);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XB(e)
    • Vars
      • K(g);P-FLIGHT,P_SPINB(e)::QAR1(B),XB(e)
      • B(e);::B(E)
      • B(e);OGATE::QAB1(B),XP(d)
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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).