MESON Chess Problem Database

Problem Display
PID: 123256 (7Q/6rp/P1p1p1p1/8/PpkNKpP1/2bNp3/1P6/n2r4 w - - 0 1)

Retter, Yosef

Source?, 1997

7Q/6rp/P1p1p1p1/8/PpkNKpP1/2bNp3/1P6/n2r4

#2

8 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.b3#
    • 1...c5
      • 2.Se5#
  • Tries
    • 1.Qe8?
      • threat
        • 2.Qxc6#
        • 2.Qxe6#
      • 1...Rxd3
        • 2.Qxc6#
      • 1...Bxb2
        • 2.Qxc6#
      • 1...Bxd4
        • 2.Qxe6#
      • 1...Rc7
        • 2.Qxe6#
      • 1...Re7
        • 2.Qxc6#
      • 1...Sb3
        • 2.Qxe6#
      • 1...c5
        • 2.Se5#
        • 2.Qb5#
        • 2.Qxe6#
      • 1...e5
        • 2.Qxc6#
        • 2.Qe6#
      • 1...Rd7!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qxe6#
        • 2.Qxc6#
      • 1...Rxd3
        • 2.Qxc6#
      • 1...Bxb2
        • 2.Qxc6#
      • 1...Bxd4
        • 2.Qxe6#
      • 1...Rc7
        • 2.Qxe6#
      • 1...Rd7
        • 2.Qxc6#
      • 1...Re7
        • 2.Qxc6#
      • 1...Sb3
        • 2.Qxe6#
      • 1...c5
        • 2.Se5#
        • 2.Qxe6#
        • 2.Qxc5#
      • 1...e5
        • 2.Qe6#
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::P(A)
    • P(h);SBLOCK::S(B)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XS(B)::QAR2(H),XP(h)
        • B(c);XP(A)::QAR2(H),XP(h)
        • B(c);XS(D)::QAB(H),XP(i)
        • R(k);::QAB(H),XP(i)
        • R(k);::QAR2(H),XP(h)
        • S(a);::QAB(H),XP(i)
      • Refutation
        • R(k);
  • Actual
    • Q(H);P_PINP(h)
    • Threat
      • DUALS(2)
    • Vars
      • R(b);XS(B)::QAR2(H),XP(h)
      • B(c);XP(A)::QAR2(H),XP(h)
      • B(c);XS(D)::QAB(H),XP(i)
      • R(k);N_SPINP(h)::QAB(H),XP(i)
      • R(k);::QAR2(H),XP(h)
      • S(a);::QAB(H),XP(i)
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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).