MESON Chess Problem Database

Problem Display
PID: 231229 (6Q1/2P1B3/4BPp1/3Nk2b/K3p2P/2P1b3/3PR1P1/8 w - - 0 1)

Willemson, Martin

1st Prize, Judische Schachverein, 1927

6Q1/2P1B3/4BPp1/3Nk2b/K3p2P/2P1b3/3PR1P1/8

#2

12 + 5

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.d4#
    • 1...Bg5
      • 2.d4#
    • 1...Bh6
      • 2.d4#
  • Tries
    • 1.d4+?
      • 1...exd4 ep
        • 2.Rxe3#
      • 1...Bxd4!
  • Keys
    • 1.Sf4!
      • 1...Kxf4
        • 2.Bd6#
      • 1...Bxd2
        • 2.Sd3#
      • 1...Bxf4
        • 2.d4#
      • 1...Bxe2
        • 2.Sxg6#
      • 1...Bf3
        • 2.Sxg6#
      • 1...Bg1
        • 2.Sd3#
      • 1...Bf2
        • 2.Sd3#
      • 1...Bd4
        • 2.Sd3#
      • 1...Bc5
        • 2.Sd3#
      • 1...Bb6
        • 2.Sd3#
      • 1...Ba7
        • 2.Sd3#
      • 1...Bg4
        • 2.Sxg6#
      • 1...g5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD,P_SPINP(b)::P(A)
  • Tries
    • Try
      • P(A);CHECK
      • Vars
        • P(b);EP,P_SPINB(a),XP(A)::R(B),XB(a)
      • Refutation
        • B(a);P_SPINP(b),XP(A)
  • Actual
    • S(G);
    • Vars
      • K(c);S_FLIGHT,XS(G)::B(K)
      • B(a);P_SPINP(b),XP(A)::S(G)
      • B(a);N_GUARD,P_SPINP(b),SBLOCK,XS(G)::P(A)
      • B(d);N_GUARD,XR(B)::S(G),XP(e)
      • B(d);N_GUARD::S(G),XP(e)
      • B(a);P_SPINP(b)::S(G)
      • P(e);OGATE::QAR2(L),XP(e)
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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).