MESON Chess Problem Database

Problem Display
PID: 92891 (4b3/n1p3K1/Q7/n2Np1p1/k3r3/1R2r3/4p3/3B4 w - - 0 1)

Scheel, Johan

Tidskrift for Schack, 1916

4b3/n1p3K1/Q7/n2Np1p1/k3r3/1R2r3/4p3/3B4

#2

5 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Sxc3#
    • 1...Sc6
      • 2.Qb5#
    • 1...e1B
      • 2.Rc3#
      • 2.Rd3#
      • 2.Rxe3#
    • 1...c5
      • 2.Sb6#
    • 1...c6
      • 2.Sb6#
  • Tries
    • 1.Rb5+?
      • 1...Rb3
        • 2.Rxa5#
        • 2.Qxa5#
      • 1...exd1Q
        • 2.Qxa5#
      • 1...exd1S
        • 2.Qxa5#
      • 1...exd1B
        • 2.Qxa5#
      • 1...exd1R
        • 2.Qxa5#
      • 1...Ka3!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qa3#
      • 1...Rxb3
        • 2.Sc3#
      • 1...Sxb3
        • 2.Qa6#
      • 1...cxd6
        • 2.Sb6#
      • 1...Rb4
        • 2.Qxb4#
      • 1...Sc4
        • 2.Qb4#
      • 1...Sb5
        • 2.Ra3#
      • 1...c5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::S(C),XR(b)
    • S(h);N_GUARD,S_CUTB(j)::QAB1(D)
    • P(i);N_GUARD::S(C)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • P(a);XB(A)::QAR1(D),XS(e)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(D);N_PINS(e)
    • Threat
      • QAR1(D)
    • Vars
      • R(b);N_GUARD,P_SPINR(b),XR(B)::S(C)
      • S(e);OGATEB,P_SPINS(e),XR(B)::QAR2(D)
      • P(i);N_GUARD,XQ(D)::S(C)
      • R(d);N_GUARD::QAR1(D),XR(d)
      • S(e);S_CUTR(d)::QAR1(D)
      • S(h);SBLOCK::B(A)+R(B),DCHECK
      • P(i);N_GUARD::S(C)
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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).