MESON Chess Problem Database

Problem Display
PID: 19160 (b3N3/5pr1/5rpb/Qn3kP1/4R1p1/3Bn1P1/2NBP3/2K5 w - - 0 1)

Persson, Hol Holger

2nd HM., Els Escacs a Catalunya, 1934

b3N3/5pr1/5rpb/Qn3kP1/4R1p1/3Bn1P1/2NBP3/2K5

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg5
      • 2.Sd4#
      • 2.Sxg7#
    • 1...Sd1
      • 2.Sd4#
    • 1...Sf1
      • 2.Sd4#
    • 1...Sg2
      • 2.Sd4#
    • 1...Sc4
      • 2.Sd4#
    • 1...Sd5
      • 2.Re7#
  • Tries
    • 1.Rxe3+?
      • 1...Kxg5
        • 2.Re5#
      • 1...Be4!
    • 1.Qxb5+?
      • 1...Sd5
        • 2.Sd4#
        • 2.Re7#
      • 1...Bd5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qxf6#
      • 1...Kxg5
        • 2.Re5#
      • 1...Bxg5
        • 2.Sxg7#
      • 1...Ra6
        • 2.Sxe3#
      • 1...Rb6
        • 2.Sxe3#
      • 1...Rc6
        • 2.Rxe3#
      • 1...Rd6
        • 2.Sxe3#
      • 1...Re6
        • 2.Sxe3#
      • 1...Sd5
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • S(a);::S(B)
    • S(a);N_SPINS(c),S_CUTB(j)::B(E)+R(G)
  • Tries
    • Try
      • R(G);CHECK,XS(a)
      • Vars
        • K(d);P-FLIGHT,XP(I)::B(C)+R(G),DCHECK
      • Refutation
        • B(j);P_SPINB(j)
    • Try
      • Q(H);CHECK,XS(c)
      • Refutation
        • B(j);P_SPINB(j)
  • Actual
    • Q(H);N_PINS(c)
    • Threat
      • QAR1(H),XR(e)
    • Vars
      • K(d);P-FLIGHT,P_SPINR(e),P_SPINS(a),XP(I)::R(G)
      • B(g);N_GUARD,SBLOCK,XP(I)::S(J),XR(i)
      • R(e);::S(B),XS(a)
      • R(e);P_PINS(B),S_CUTB(j)::B(E)+R(G),XS(a)
      • S(a);S_CUTB(j)::B(E)+R(G)
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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).