MESON Chess Problem Database

Problem Display
PID: 99751 (4R3/3p4/KB2br2/1N3rp1/4NkPp/7R/3pB3/1Q6 w - - 0 1)

Erokhin, Vladimir Alekseevich

Magyar Sakkszovetseg, 1977

4R3/3p4/KB2br2/1N3rp1/4NkPp/7R/3pB3/1Q6

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Be3#
    • 1...Ba2
      • 2.Qf1#
    • 1...Bb3
      • 2.Qf1#
    • 1...Bc4
      • 2.Qf1#
    • 1...Bd5
      • 2.Qf1#
    • 1...Bf7
      • 2.Qf1#
    • 1...Bg8
      • 2.Qf1#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qe4#
      • 1...Re5
        • 2.Rf3#
      • 1...Bd5
        • 2.Sd3#
      • 1...d5!
  • Keys
    • 1.Sed6!
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qe4#
      • 1...Re5
        • 2.Qf1#
      • 1...Bd5
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(d);SBLOCK::B(H)
    • B(f);P_PINB(H)::QAR(A)
    • B(f);P_PINB(H),P_PINS(F)::QAR(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P_SPINB(f),S_FLIGHT::QAR1(A)
        • R(d);SBLOCK::R1(C)
        • B(f);P_PINB(H)::S(D)
      • Refutation
        • P(h);
  • Actual
    • S(D);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);P_SPINB(f),S_FLIGHT::QAR1(A)
      • R(d);SBLOCK::QAR(A)
      • B(f);::B(H)
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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).