MESON Chess Problem Database

Problem Display
PID: 164636 (8/3K4/1p1nP3/1rb2Np1/1p1Pk3/1B3RP1/4pB2/3r1bNQ w - - 0 1)

Shanshin, Valery Yurevich

Zadachi i Etyudi, 2014

8/3K4/1p1nP3/1rb2Np1/1p1Pk3/1B3RP1/4pB2/3r1bNQ

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Rf4#
  • Tries
    • 1.Bc2+?
      • 1...Rd3
        • 2.Rf4#
      • 1...Kd5!
    • 1.Qh4+?
      • 1...g4
        • 2.Qxg4#
      • 1...gxh4!
    • 1.Qh7?
      • threat
        • 2.Sxd6#
        • 2.Re3#
      • 1...Rxd4
        • 2.Re3#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Sc4
        • 2.Se7#
      • 1...e1Q
        • 2.Sxd6#
      • 1...e1R
        • 2.Sxd6#
      • 1...Rd3
        • 2.Sxd6#
      • 1...Sb7
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
        • 2.Re3#
      • 1...Sf7
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
        • 2.Re3#
      • 1...Sc8
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
        • 2.Re3#
      • 1...Se8
        • 2.Sh4#
        • 2.Sd6#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
        • 2.Re3#
      • 1...Bxd4!
    • 1.Qh8?
      • threat
        • 2.Qe5#
      • 1...Bxd4
        • 2.Sxd6#
      • 1...Sc4
        • 2.Qa8#
      • 1...Sf7
        • 2.Qa8#
      • 1...Rxd4!
  • Keys
    • 1.Se7!
      • threat
        • 2.Bd5#
      • 1...Rxd4
        • 2.Re3#
      • 1...Bxd4
        • 2.Re3#
      • 1...Sc4
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK::QAB(B)+R(E),DCHECK
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • R(a);P_SPINR(a)::QAB(B)+R(E),DCHECK
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • P(h);P_SPINP(h)::QAR2(B),XP(h)
      • Refutation
        • P(h);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XP(G)::R1(E)
        • S(j);OGATE,P_PINP(G),P_SPINS(j),XS(H)::QAB1(B),XS(j)
        • S(j);N_GUARD,P_PINP(G)::QAB(B)+S(H)
        • P(c);::QAB(B)+S(H),DCHECK,XS(j)
        • R(a);::QAB(B)+S(H),DCHECK,XS(j)
      • Refutation
        • B(g);XP(G)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • B(g);N_GUARD,XP(G)::S(H),XS(j)
        • S(j);N_GUARD,P_PINP(G)::QAB(B)
      • Refutation
        • R(a);XP(G)
  • Actual
    • S(H);
    • Threat
      • B(D)
    • Vars
      • R(a);SBLOCK,XP(G)::QAB(B)+R(E),DCHECK
      • B(g);SBLOCK,XP(G)::QAB(B)+R(E),DCHECK
      • S(j);N_GUARD,P_PINP(G)::QAB(B)
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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).