MESON Chess Problem Database

Problem Display
PID: 151371 (8/2R3nr/1P1B3p/b2k4/1r2N1QK/1n1pPbNp/8/5q2 w - - 0 1)

Shanshin, Valery Yurevich

5th Prize, Die Schwalbe, 2013

8/2R3nr/1P1B3p/b2k4/1r2N1QK/1n1pPbNp/8/5q2

#2

8 + 11

23 Die Schwalbe 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Rc5#
    • 1...Sc1
      • 2.Rc5#
    • 1...Sd2
      • 2.Rc5#
    • 1...Sd4
      • 2.Rc5#
    • 1...Sc5
      • 2.Rxc5#
    • 1...Sf5+
      • 2.Qxf5#
    • 1...Sh5
      • 2.Qf5#
    • 1...Se6
      • 2.Qf5#
    • 1...Se8
      • 2.Qf5#
  • Tries
    • 1.Qg5+?
      • 1...Ke6
        • 2.Re7#
        • 2.Qe5#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...hxg5+!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Bf4#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Rxb6
        • 2.Sf6#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Bg4
        • 2.Sc3#
      • 1...Sh5
        • 2.Qf5#
      • 1...Se6
        • 2.Qc6#
      • 1...Se8
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::R1(H)
    • S(b);N_GUARD::R1(H),XS(b)
    • S(j);CHECK,N_GUARD::QAR2(D),XS(j)
    • S(j);N_GUARD::QAR2(D)
  • Tries
    • Try
      • Q(D);CHECK,P_SPINS(C)
      • Vars
        • S(j);CHECK,N_GUARD,P_SPINS(j)::QAR2(D),XS(j)
      • Refutation
        • P(i);CHECK,XQ(D)
  • Actual
    • Q(D);P_SPINS(C)
    • Threat
      • QAR(D)+B(G)
    • Vars
      • S(j);CHECK,N_GUARD::QAR2(D),XS(j)
      • R(f);N_PINS(C),XP(F)::S(C)
      • S(b);N_GUARD::R1(H),XS(b)
      • B(d);N_PINS(C)::S(C)
      • S(j);N_GUARD::QAR2(D)
      • S(j);SBLOCK::QAB1(D)
HTML5 logo

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).