MESON Chess Problem Database

Problem Display
PID: 177963 (3K3Q/p3Np1p/4k3/BR2pNp1/R7/5pq1/2p5/b7 w - - 0 1)

Dombrovskis, Alfreds A

Sahs (Latvia), 1987

3K3Q/p3Np1p/4k3/BR2pNp1/R7/5pq1/2p5/b7

#2

7 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...a6
      • 2.Rb6#
    • 1...f6
      • 2.Qg8#
  • Tries
    • 1.Sg7+?
      • 1...Kd6
        • 2.Bb4#
        • 2.Bc7#
        • 2.Rd5#
      • 1...Kf6!
    • 1.Sd5?
      • threat
        • 2.Qf6#
      • 1...Kxf5
        • 2.Qf6#
      • 1...f6
        • 2.Qxf6#
      • 1...e4!
    • 1.Sg8?
      • threat
        • 2.Qf6#
      • 1...Kxf5
        • 2.Qf6#
      • 1...f6
        • 2.Qxf6#
      • 1...e4!
    • 1.Rd5?
      • threat
        • 2.Rd6#
      • 1...f6
        • 2.Qg8#
      • 1...e4!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Ra6#
      • 1...f6
        • 2.Qg8#
      • 1...Qf2
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Qg1
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...e4
        • 2.Qf6#
      • 1...a5
        • 2.Rb6#
      • 1...a6
        • 2.Rxa6#
        • 2.Rb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(h);N_GUARD::R(C)
    • P(i);OGATEB,SBLOCK::QAB(G)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • S(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(g);S_FLIGHT,XS(D)::QAR1(G)
        • P(i);::QAR1(G),XP(i)
      • Refutation
        • P(e);
    • Try
      • S(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(g);P_SPINP(e),S_FLIGHT,XS(D)::QAR1(G)
        • P(i);::QAR1(G),XP(i)
      • Refutation
        • P(e);
    • Try
      • R(C);
      • Threat
        • R1(C)
      • Vars
        • P(i);OGATEB,SBLOCK::QAB(G)
      • Refutation
        • P(e);
  • Actual
    • B(B);
    • Threat
      • R(A)
    • Vars
      • P(i);OGATEB,SBLOCK::QAB(G)
      • P(e);::QAR1(G)
      • P(h);N_GUARD::R(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).