MESON Chess Problem Database

Problem Display
PID: 87921 (3K4/2p5/6P1/p2Q4/3RpN1k/r3B2P/2q3pR/3b1Nn1 w - - 0 1)

Erokhin, Vladimir Alekseevich

Uralski Problemist, 1998

3K4/2p5/6P1/p2Q4/3RpN1k/r3B2P/2q3pR/3b1Nn1

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sxg2#
    • 1...Qb3
      • 2.Sxg2#
    • 1...Qd3
      • 2.Sxg2#
    • 1...Qa4
      • 2.Sxg2#
    • 1...Qc1
      • 2.Sxg2#
    • 1...Qc3
      • 2.Sxg2#
    • 1...Qc4
      • 2.Sxg2#
    • 1...Qc5
      • 2.Sxg2#
    • 1...Qc6
      • 2.Sxg2#
    • 1...Be2
      • 2.Sxg2#
    • 1...Bh5
      • 2.Qxh5#
    • 1...Se2
      • 2.Sxg2#
      • 2.Qh5#
    • 1...Sf3
      • 2.Qh5#
  • Tries
    • 1.Se2?
      • threat
        • 2.Qg5#
      • 1...Qc5
        • 2.Rxe4#
      • 1...Sf3
        • 2.Bf2#
      • 1...Rxe3!
    • 1.Bf2+?
      • 1...Rg3
        • 2.Sxg2#
        • 2.Bxg3#
      • 1...Qxf2!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qg5#
      • 1...Qc5
        • 2.Bf2#
      • 1...Sf3
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • Q(c);N_GUARD::S(F),XP(d)
    • B(a);S_CUTQ(c)::S(F),XP(d)
    • B(a);N_GUARD::QAR1(G),XB(a)
    • S(b);S_CUTB(a)::QAR1(G)
  • Tries
    • Try
      • S(F);P_PINP(f)
      • Threat
        • QAB1(G)
      • Vars
        • Q(c);N_GUARD::R(E),XP(f)
        • S(b);S_CUTR(e)::B(C)
      • Refutation
        • R(e);XB(C)
    • Try
      • B(C);CHECK
      • Refutation
        • Q(c);XB(C)
  • Actual
    • S(F);P_PINP(f)
    • Threat
      • QAB1(G)
    • Vars
      • Q(c);N_GUARD::B(C)
      • S(b);S_CUTB(a)::R(E),XP(f)
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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).