MESON Chess Problem Database

Problem Display
PID: 174935 (8/2Rp2p1/3p1bN1/p2k1P1K/8/4P2p/NnQ4P/2n5 w - - 0 1)

Ros, Johan August

370 Utvalda Svenska Schackprob, 1901

8/2Rp2p1/3p1bN1/p2k1P1K/8/4P2p/NnQ4P/2n5

#2

8 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Sxc3#
    • 1...Bd4
      • 2.e4#
    • 1...Bh4
      • 2.Sc3#
    • 1...Be5
      • 2.Se7#
    • 1...Bg5
      • 2.Sc3#
    • 1...Be7
      • 2.Sc3#
    • 1...Bd8
      • 2.Sc3#
    • 1...Sd1
      • 2.Qc4#
    • 1...Sd3
      • 2.Qc4#
    • 1...Sa4
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...a4
      • 2.Sb4#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Qe4#
        • 2.e4#
      • 1...Bc3
        • 2.Qe4#
      • 1...Bd4
        • 2.Rxd4#
        • 2.e4#
      • 1...Scd3
        • 2.e4#
      • 1...Sbd3
        • 2.e4#
      • 1...Sxc4!
    • 1.Qa4?
      • threat
        • 2.e4#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sxa4!
    • 1.Qxc1?
      • threat
        • 2.Qh1#
      • 1...Sd1
        • 2.Qc4#
      • 1...Ke4!
  • Keys
    • 1.Qb1!
      • 1...Sxa2
        • 2.Qh1#
      • 1...Scd3
        • 2.Qh1#
      • 1...Sbd3
        • 2.Qb7#
      • 1...Bc3
        • 2.Sxc3#
      • 1...Bd4
        • 2.e4#
      • 1...Bh4
        • 2.Sc3#
      • 1...Be5
        • 2.Se7#
      • 1...Bg5
        • 2.Sc3#
      • 1...Be7
        • 2.Sc3#
      • 1...Bd8
        • 2.Sc3#
      • 1...Se2
        • 2.Qh1#
      • 1...Sb3
        • 2.Qh1#
      • 1...Sd1
        • 2.Qb7#
      • 1...Sa4
        • 2.Qb7#
      • 1...Sc4
        • 2.Qb7#
      • 1...a4
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(g);N_GUARD::S(A),XB(g)
    • B(g);SBLOCK::P(D)
    • B(g);N_GUARD::S(A)
    • B(g);N_GUARD,SBLOCK::S(G)
    • S(b);N_GUARD::QAB1(B)
    • S(b);N_GUARD::QAB1(B),XS(b)
    • P(d);N_GUARD::S(A)
  • Tries
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);::QAB1(B)
        • S(a);::P(D)
        • S(b);::P(D)
      • Refutation
        • S(b);XR(H)
    • Try
      • Q(B);
      • Threat
        • P(D)
      • Vars
        • B(g);N_GUARD::QAR1(B),XB(g)
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);XS(a)
      • Threat
        • QAB(B)
      • Vars
        • S(b);N_GUARD::QAB1(B)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • S(a);OGATE,XS(A)::QAB(B)
      • S(a);OGATE::QAB(B)
      • S(b);OGATE::QAB(B)
      • B(g);N_GUARD::S(A),XB(g)
      • B(g);SBLOCK::P(D)
      • B(g);N_GUARD::S(A)
      • B(g);N_GUARD,SBLOCK::S(G)
      • P(d);N_GUARD::S(A)
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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).