MESON Chess Problem Database

Problem Display
PID: 79827 (8/1r2p3/qp5Q/4B3/n3P1r1/1P1k2p1/1p2R3/n1b2BK1 w - - 0 1)

Savournin, Jacques

Comm., Europe Echecs, 1965

8/1r2p3/qp5Q/4B3/n3P1r1/1P1k2p1/1p2R3/n1b2BK1

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Rd2#
    • 1...Bd2
      • 2.Qxd2#
    • 1...Be3+
      • 2.Qxe3#
    • 1...Sc2
      • 2.Re1#
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qd5#
      • 1...Be3+
        • 2.Rf2#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Sxb3
        • 2.Qc2#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qb5
        • 2.Qxb5#
      • 1...Qa5
        • 2.Qc4#
      • 1...Rd7
        • 2.Qxd7#
      • 1...Bd2
        • 2.Re1#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sc3
        • 2.Qxc3#
      • 1...e6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(g);SBLOCK,XP(E)::B(A)+R(C),DCHECK
    • B(b);N_GUARD::QAR1(G),XB(b)
    • B(b);CHECK,N_GUARD::QAR1(G),XB(b)
    • S(a);SBLOCK::B(A)+R(C)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G)
    • Vars
      • B(b);CHECK,SBLOCK::B(A)+R(C)
      • R(g);OGATE,XP(E)::QAB1(G),XR(g)
      • S(a);N_GUARD,XP(D)::QAB1(G)
      • Q(h);N_GUARD::QAB1(G),XQ(h)
      • Q(h);N_GUARD::QAB(G),XQ(h)
      • Q(h);N_GUARD::QAB1(G)
      • R(j);N_GUARD::QAR(G),XR(j)
      • B(b);SBLOCK::B(A)+R(C)
      • S(a);N_GUARD::QAB1(G),XS(a)
      • S(f);N_GUARD::QAR1(G),XS(f)
      • P(k);N_GUARD::QAR(G)
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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).