MESON Chess Problem Database

Problem Display
PID: 245359 (4Q3/8/2r1pB2/2Rp1p2/3pk3/1R3nP1/5PBn/1NqbN2K w - - 0 1)

Onkoud, Abdelaziz

Sinfonie Scacchistiche, 2015

4Q3/8/2r1pB2/2Rp1p2/3pk3/1R3nP1/5PBn/1NqbN2K

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Sxd2#
    • 1...Qa3
      • 2.Sd2#
    • 1...Qc4
      • 2.Sd2#
    • 1...Qxc5
      • 2.Sd2#
    • 1...Rxc5
      • 2.Qxe6#
    • 1...Rc7
      • 2.Qxe6#
    • 1...Rc8
      • 2.Qxe6#
    • 1...f4
      • 2.Qg6#
    • 1...e5
      • 2.Qxe5#
  • Tries
    • 1.Rxc1?
      • threat
        • 2.Sd2#
      • 1...f4
        • 2.Qg6#
      • 1...Rc2
        • 2.Qxe6#
      • 1...Sf1!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Rxd4#
      • 1...Qxc4
        • 2.Sd2#
      • 1...Rxc4
        • 2.Qxe6#
      • 1...dxc4
        • 2.Qxc6#
      • 1...f4
        • 2.Qg6#
      • 1...Qb2
        • 2.Re3#
      • 1...Qd2
        • 2.Sxd2#
      • 1...Qe3
        • 2.Rxe3#
      • 1...Qc3
        • 2.Sxc3#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::S(A),XQ(a)
    • Q(a);N_GUARD::S(A)
    • Q(a);N_GUARD,XR(H)::S(A)
    • R(i);N_GUARD,XR(H)::QAR2(J),XP(j)
    • R(i);N_GUARD::QAR2(J),XP(j)
    • P(h);OGATEB::QAB(J)
    • P(j);OGATE::QAR1(J),XP(j)
  • Tries
    • Try
      • R(H);XQ(a)
      • Threat
        • S(A)
      • Vars
        • P(h);OGATEB::QAB(J)
        • R(i);N_GUARD::QAR2(J),XP(j)
      • Refutation
        • S(c);
  • Actual
    • R(H);N_PINP(j),P_PINP(e)
    • Threat
      • R1(H),XP(e)
    • Vars
      • Q(a);N_GUARD,N_SPINP(e),P_SPINP(j),XR(H)::S(A)
      • R(i);N_GUARD,N_SPINP(e),P_SPINP(j),XR(H)::QAR2(J),XP(j)
      • P(g);N_SPINP(e),OGATEB,P_SPINP(j),XR(H)::QAB(J),XR(i)
      • P(h);OGATEB::QAB(J)
      • Q(a);N_GUARD::R1(F)
      • Q(a);N_GUARD::S(A),XQ(a)
      • Q(a);N_GUARD::R1(F),XQ(a)
      • P(j);OGATE::QAR1(J),XP(j)
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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).