MESON Chess Problem Database

Problem Display
PID: 274425 (2n5/5B1b/2P2R2/RqQrk1P1/1np1p1P1/pN1p4/1r1N2Kb/B7 w - - 0 1)

du Gres, Jacques

diagrammes, 1979

2n5/5B1b/2P2R2/RqQrk1P1/1np1p1P1/pN1p4/1r1N2Kb/B7

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qd4#
    • 1...Qa6
      • 2.Qd4#
    • 1...Qxc6
      • 2.Qd4#
    • 1...Qb7
      • 2.Qd4#
    • 1...Qb8
      • 2.Qd4#
    • 1...Bf4
      • 2.Re6#
    • 1...Bf5
      • 2.Rxf5#
    • 1...Bg8
      • 2.Rf5#
    • 1...Sb6
      • 2.Qe7#
    • 1...Sa7
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Bxb2+?
      • 1...c3
        • 2.Bxc3#
      • 1...axb2!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Re6#
      • 1...Qxc6
        • 2.Qd4#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Rc5
        • 2.Qd4#
      • 1...Rd6
        • 2.Sxc4#
      • 1...Rd7
        • 2.Sxc4#
      • 1...Rd8
        • 2.Sxc4#
      • 1...Bf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • Q(h);S_CUTR(i)::QAB1(G)
    • Q(h);S_CUTR(i),XP(I)::QAB1(G)
    • B(b);SBLOCK::R1(J)
    • B(k);N_GUARD::R1(J),XB(k)
    • B(k);N_GUARD::R1(J)
    • S(l);N_GUARD::QAR2(G)
    • S(l);N_GUARD::QAR2(G),XS(l)
  • Tries
    • Try
      • B(A);CHECK,N_SPINS(B),P_PINR(i),XR(a)
      • Vars
        • P(f);P_SPINP(f)::B(A),XP(f)
      • Refutation
        • P(c);XB(A)
  • Actual
    • Q(G);N_SPINS(B)
    • Threat
      • R1(J)
    • Vars
      • Q(h);S_CUTR(i),XP(I)::QAB1(G)
      • R(i);N_GUARD,N_SPINR(a),P_SPINQ(h)::QAB1(G),XR(i)
      • R(i);N_GUARD::QAB1(G)
      • R(i);P_SPINQ(h)::S(B),XP(f)
      • B(k);N_GUARD::QAR1(G),XB(k)
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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).