MESON Chess Problem Database

Problem Display
PID: 260869 (3Q4/5N1B/2b1p2p/5p2/RKnnk3/1pR3P1/2rr1P2/4N1b1 w - - 0 1)

Fomichev, Evgeny Vasilevich

Comm., Neue Zurcher Zeitung, 2011

3Q4/5N1B/2b1p2p/5p2/RKnnk3/1pR3P1/2rr1P2/4N1b1

#2

9 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qh4#
    • 1...Sb2
      • 2.Re3#
    • 1...Sa3
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...Sa5
      • 2.Re3#
    • 1...Se5
      • 2.Re3#
    • 1...Sb6
      • 2.Re3#
    • 1...Se2
      • 2.f3#
    • 1...Sb5
      • 2.f3#
  • Tries
    • 1.Sg5+?
      • 1...Ke5
        • 2.f4#
      • 1...hxg5!
  • Keys
    • 1.Kc5!
      • threat
        • 2.Qh4#
      • 1...Rxf2
        • 2.Qxd4#
      • 1...Se3
        • 2.f3#
      • 1...Se5
        • 2.Sd6#
      • 1...Se2
        • 2.Re3#
      • 1...Sf3
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(i);SBLOCK::QAR(I)
    • S(e);N_GUARD::R1(C)
    • S(e);N_GUARD::R1(C),XS(e)
    • S(f);N_GUARD::P(B)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(g);N_SPINP(h),P-FLIGHT,S_CUTP(k)::P(B)
      • Refutation
        • P(k);XS(G)
  • Actual
    • K(F);S_FLIGHT
    • Threat
      • QAR(I)
    • Vars
      • R(c);N_GUARD,XP(B)::QAR1(I),XS(f)
      • S(e);P_PINR(C),P_SPINS(f)::P(B)
      • S(e);N_GUARD,P_PINR(C),P_SPINS(f),SBLOCK::S(G)
      • S(f);P_PINP(B),P_SPINS(e)::R1(C)
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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).