MESON Chess Problem Database

Problem Display
PID: 161458 (5n1r/5Q2/KpP5/1p3p2/1p1PNR1b/2Bk2nR/1p1p1P2/3B4 w - - 0 1)

Shanshin, Valery Yurevich

Probleemblad, 2016

5n1r/5Q2/KpP5/1p3p2/1p1PNR1b/2Bk2nR/1p1p1P2/3B4

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.Rxg3#
    • 1...Bf6
      • 2.Rxg3#
    • 1...Be7
      • 2.Rxg3#
    • 1...Bd8
      • 2.Rxg3#
  • Tries
    • 1.Sc5+?
      • 1...Kxc3
        • 2.Qb3#
      • 1...bxc5!
    • 1.Bxb2?
      • threat
        • 2.Qb3#
      • 1...b3
        • 2.Qxb3#
      • 1...Se6!
    • 1.Qb3?
      • threat
        • 2.Bxb2#
      • 1...bxc3
        • 2.Qxc3#
      • 1...b1Q
        • 2.Bb2#
      • 1...b1B
        • 2.Ba1#
        • 2.Bb2#
      • 1...b1R
        • 2.Bb2#
      • 1...b1S!
    • 1.Qd5?
      • threat
        • 2.Rf3#
        • 2.Qxb5#
      • 1...bxc3
        • 2.Rf3#
      • 1...Bg5
        • 2.Rxg3#
        • 2.Qxb5#
      • 1...fxe4!
    • 1.Qxf5?
      • threat
        • 2.Qxb5#
      • 1...Kc4
        • 2.Qxb5#
      • 1...bxc3
        • 2.Sd6#
      • 1...Rh5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Rf3#
      • 1...Kxc3
        • 2.Qb3#
      • 1...bxc3
        • 2.Qxf5#
      • 1...Bg5
        • 2.Rxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(f);N_GUARD::R(D),XS(d)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT,XB(C)::QAR1(J)
      • Refutation
        • P(i);XS(F)
    • Try
      • B(C);XP(a)
      • Threat
        • QAR2(J)
      • Vars
        • P(e);::QAR2(J),XP(e)
      • Refutation
        • S(j);
    • Try
      • Q(J);
      • Threat
        • QAR(J)+B(C),XP(a)
      • Vars
        • P(e);OGATE,P_SPINP(e),XB(C)::QAR1(J),XP(e)
        • P(a);::QAR(J)+B(C)
      • Refutation
        • P(a);
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);XB(C)::R(G)
      • Refutation
        • P(h);XS(F)
    • Try
      • Q(J);XP(h)
      • Threat
        • QAB(J),XP(g)
      • Vars
        • K(c);N_SPINS(d),S_FLIGHT::QAB1(J),XP(g)
        • P(e);SBLOCK,XB(C)::QAB(J)+S(F)
      • Refutation
        • R(k);
  • Actual
    • S(F);
    • Threat
      • R(G)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XB(C)::QAR1(J)
      • P(e);SBLOCK,XB(C)::QAB(J),XP(h)
      • B(f);N_GUARD::R(D),XS(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).