MESON Chess Problem Database

Problem Display
PID: 44205 (3R3r/qpk2KR1/pN5r/n6p/2pQ1P2/1pP1P3/1P4B1/4B3 w - - 0 1)

Gavrilov, Constantin Grigorievich

Het Schaakleven, 1931

3R3r/qpk2KR1/pN5r/n6p/2pQ1P2/1pP1P3/1P4B1/4B3

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb6
      • 2.Qd7#
    • 1...Qb8
      • 2.Rd7#
    • 1...Qa8
      • 2.Sxa8#
    • 1...Rxb6
      • 2.Qd7#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Re6
      • 2.Kxe6#
    • 1...Rf6+
      • 2.Kxf6#
    • 1...Rg6
      • 2.Kxg6#
    • 1...R6h7
      • 2.Qd6#
    • 1...R8h7
      • 2.Rc8#
    • 1...Re8
      • 2.Kxe8#
    • 1...Rf8+
      • 2.Kxf8#
    • 1...Rg8
      • 2.Kxg8#
  • Tries
    • 1.Qe5+?
      • 1...Kxd8
        • 2.Qe7#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Kxb6!
  • Keys
    • 1.Bh4!
      • 1...Rf6+
        • 2.Kxf6#
      • 1...Rf8+
        • 2.Kxf8#
      • 1...Qxb6
        • 2.Qd7#
      • 1...Rxb6
        • 2.Qd7#
      • 1...Rxd8
        • 2.Qxd8#
      • 1...Rc6
        • 2.Sd5#
      • 1...Qb8
        • 2.Rd7#
      • 1...Qa8
        • 2.Sxa8#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Re6
        • 2.Kxe6#
      • 1...Rg6
        • 2.Kxg6#
      • 1...R6h7
        • 2.Qd6#
      • 1...R8h7
        • 2.Rc8#
      • 1...Re8
        • 2.Kxe8#
      • 1...Rg8
        • 2.Kxg8#
      • 1...Sc6
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(g);SBLOCK,XS(H)::QAR1(F)
    • Q(g);SBLOCK::R1(K)
    • Q(g);N_GUARD::S(H),XQ(g)
    • R(f);SBLOCK,XS(H)::QAR1(F)
    • R(f);N_GUARD::QAB1(F),XR(f)
    • R(f);::R(J)+K(I),XR(f)
    • R(f);CHECK::R(J)+K(I),XR(f)
    • R(f);N_GUARD,P_PINR(J)::QAB1(F)
    • R(j);N_GUARD,P_PINR(J)::R1(K)
    • R(j);::R(J)+K(I),XR(j)
    • R(j);CHECK::R(J)+K(I),XR(j)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(i);S_FLIGHT,XR(K)::QAB1(F)
        • R(f);N_GUARD,P_SPINR(f)::QAB1(F),XR(f)
      • Refutation
        • K(i);S_FLIGHT,XS(H)
  • Actual
    • B(A);
    • Vars
      • R(f);CHECK::R(J)+K(I),XR(f)
      • R(j);CHECK::R(J)+K(I),XR(j)
      • Q(g);SBLOCK,XS(H)::QAR1(F)
      • R(f);SBLOCK,XS(H)::QAR1(F)
      • R(j);OGATE,XR(K)::QAB1(F),XR(j)
      • R(f);SBLOCK::S(H)
      • Q(g);SBLOCK::R1(K)
      • Q(g);N_GUARD::S(H),XQ(g)
      • R(f);N_GUARD::QAB1(F),XR(f)
      • R(f);::R(J)+K(I),XR(f)
      • R(f);N_GUARD,P_PINR(J)::QAB1(F)
      • R(j);N_GUARD,P_PINR(J)::R1(K)
      • R(j);::R(J)+K(I),XR(j)
      • S(c);SBLOCK::S(H)
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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).