MESON Chess Problem Database

Problem Display
PID: 187671 (2r3q1/3QP3/2p2bP1/p1pP4/K2k1Br1/4RpP1/4PP2/2R4n w - - 0 1)

van der Werf, JD

Schaakblad, 1909

2r3q1/3QP3/2p2bP1/p1pP4/K2k1Br1/4RpP1/4PP2/2R4n

#2

11 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.dxe6#
    • 1...Qh7
      • 2.dxc6#
    • 1...Qxg6
      • 2.dxc6#
    • 1...Qg7
      • 2.dxc6#
    • 1...Qf8
      • 2.dxc6#
    • 1...Qh8
      • 2.dxc6#
    • 1...Bh4
      • 2.Be5#
    • 1...Be5
      • 2.Bxe5#
    • 1...Bg5
      • 2.Be5#
    • 1...Bxe7
      • 2.Be5#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Qxc5#
      • 1...Bxe7
        • 2.Be5#
        • 2.Qe5#
      • 1...cxd5
        • 2.Qxf6#
      • 1...c4
        • 2.Rd1#
      • 1...Qxd5!
  • Keys
    • 1.Bd6!
      • threat
        • 2.Bxc5#
      • 1...Kxd5+
        • 2.Bf4#
      • 1...Bxe7
        • 2.Be5#
      • 1...cxd5
        • 2.Qxg4#
      • 1...Re4
        • 2.Rd3#
      • 1...c4
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(j);OGATE::QAR(J)+P(H),XQ(j)
    • Q(j);N_GUARD::QAR(J)+P(H),XP(g)
    • Q(j);N_GUARD,XP(I)::QAR(J)+P(H),XP(g)
    • B(h);N_GUARD::B(G)
    • B(h);N_GUARD::B(G),XB(h)
    • B(h);N_GUARD,XP(K)::B(G)
  • Tries
    • Try
      • Q(J);
      • Threat
        • QAB1(J),XP(f)
      • Vars
        • P(g);P_SPINP(g),SBLOCK,XP(H)::QAB(J),XB(h)
        • P(f);SBLOCK::R(A)
      • Refutation
        • Q(j);P_SPINQ(j),XP(H)
  • Actual
    • B(G);
    • Threat
      • B(G),XP(f)
    • Vars
      • K(c);CHECK,OGATEB,P-FLIGHT,XP(H)::QAR(J)+B(G)
      • B(h);N_GUARD,XP(K)::B(G)
      • P(g);SBLOCK,XP(H)::QAR(J),XR(d)
      • R(d);SBLOCK::R1(D)
      • P(f);SBLOCK::R(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).