MESON Chess Problem Database

Problem Display
PID: 32414 (b4R2/2pQ2n1/2p5/2p1P1p1/2RBk3/K3N3/PNp1rn2/2r5 w - - 0 1)

Restad, Birger

De Problemist, 1928

b4R2/2pQ2n1/2p5/2p1P1p1/2RBk3/K3N3/PNp1rn2/2r5

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3+
      • 2.Bc3#
    • 1...Sd1
      • 2.Qg4#
    • 1...Sh1
      • 2.Qg4#
    • 1...Sg4
      • 2.Qxg4#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sh5
      • 2.Qf5#
      • 2.Qh7#
    • 1...Se6
      • 2.Qh7#
    • 1...Se8
      • 2.Qf5#
      • 2.Qh7#
    • 1...cxd4
      • 2.Qxd4#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Sxc5#
        • 2.Bxc5#
      • 1...Kxd3
        • 2.Bxc5#
      • 1...Rxe3
        • 2.Ba1#
        • 2.Bb2#
        • 2.Bc3#
        • 2.Bxc5#
      • 1...cxd4
        • 2.Qxd4#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Se6
        • 2.Qh7#
      • 1...Sxd3!
    • 1.Qf7?
      • threat
        • 2.Qf3#
      • 1...Rxe3+
        • 2.Bc3#
      • 1...Sf5
        • 2.Qxf5#
      • 1...g4
        • 2.Qf4#
      • 1...cxd4!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sxc5#
      • 1...Rxe3+
        • 2.Bc3#
      • 1...Kd3
        • 2.Bxc5#
      • 1...cxd4
        • 2.Qxd4#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sd3
        • 2.Sc3#
      • 1...Se6
        • 2.Qh7#

FEATURES

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