MESON Chess Problem Database

Problem Display
PID: 199546 (r3k3/1R1R1p2/5P2/5N1n/pB2Np2/3K2pB/4Q2r/2b5 w q - 0 1)

Storozhenko, Ivan Ivanovich

Zadachi i Etyudi, 2015

r3k3/1R1R1p2/5P2/5N1n/pB2Np2/3K2pB/4Q2r/2b5

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Sd2#
    • 1...Rxh3
      • 2.Sd2#
    • 1...Ba3
      • 2.Sf2#
    • 1...Sxf6
      • 2.Sxf6#
      • 2.Sg7#
    • 1...Sg7
      • 2.Sxg7#
    • 1...g2
      • 2.Sd2#
  • Tries
    • 1.Be7?
      • threat
        • 2.Sed6#
        • 2.Sfd6#
      • 1...Ra6
        • 2.Rd8#
      • 1...Ba3!
    • 1.Qg4?
      • threat
        • 2.Qg8#
      • 1...Sxf6
        • 2.Sxf6#
        • 2.Sg7#
      • 1...Sg7
        • 2.Sxg7#
      • 1...Rd2+!
    • 1.Qxh5?
      • threat
        • 2.Sg7#
        • 2.Qxf7#
        • 2.Qh8#
      • 1...Rxh3
        • 2.Sg7#
        • 2.Qxf7#
      • 1...Rd2+!
  • Keys
    • 1.Rxf7!
      • threat
        • 2.Rf8#
      • 1...Rd8+
        • 2.Sed6#
      • 1...0-0-0+
        • 2.Sfd6#
      • 1...Kd8
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD::QAR(A)+S(E)
    • R(b);N_GUARD,XB(C)::QAR(A)+S(E)
    • B(a);N_GUARD::QAR(A)+S(E)
    • S(f);N_GUARD::S(F),XS(f)
    • P(c);S_CUTR(b)::QAR(A)+S(E)
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);N_GUARD::R1(I)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • S(f);N_GUARD::S(F),XS(f)
      • Refutation
        • R(b);CHECK
    • Try
      • Q(A);P_PINP(g),XS(f)
      • Threat
        • DUALS(3)
      • Refutation
        • R(b);CHECK
  • Actual
    • R(I);XP(g)
    • Threat
      • R1(I)
    • Vars
      • R(h);CHECK,SBLOCK::QAR(A)+S(E),DCHECK
      • K(i);0-0-0,CHECK::B(C)+S(F),DCHECK
      • K(i);P-FLIGHT::R(I)
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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).