MESON Chess Problem Database

Problem Display
PID: 92021 (1R1N4/6K1/pBP5/1k1n4/3RPpQ1/4p3/P1P5/r5n1 w - - 0 1)

Scheel, Johan

Karlstadt Chess Club, 1912

1R1N4/6K1/pBP5/1k1n4/3RPpQ1/4p3/P1P5/r5n1

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.a4#
    • 1...Rc1
      • 2.a4#
    • 1...Rd1
      • 2.a4#
    • 1...Re1
      • 2.a4#
    • 1...Rf1
      • 2.a4#
    • 1...Se2
      • 2.Qxe2#
    • 1...Sh3
      • 2.Qe2#
    • 1...Sxb6
      • 2.Qf5#
      • 2.Qh5#
      • 2.Qg5#
  • Tries
    • 1.Ba7+?
      • 1...Sb6
        • 2.Qf5#
        • 2.Qh5#
        • 2.Qg5#
      • 1...Ka5!
    • 1.Bc7+?
      • 1...Sb6
        • 2.Qf5#
        • 2.Qh5#
        • 2.Qg5#
      • 1...Kc5!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qd3#
      • 1...Rxd1
        • 2.a4#
      • 1...Sxb6
        • 2.Qh5#
      • 1...Sb4
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::P(A)
    • S(b);N_GUARD::QAB(E),XS(b)
    • S(b);N_GUARD::QAB(E)
  • Tries
    • Try
      • B(F);CHECK
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • B(F);CHECK
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • R(a);N_GUARD,XQ(E)::P(A)
      • S(f);OGATEB,P_SPINS(f),XB(F)::QAR(E)
      • S(f);SBLOCK::P(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).