MESON Chess Problem Database

Problem Display
PID: 245287 (K7/R1p2b2/1kp2p2/p1n4R/Pn6/N3B3/1Q6/1r4b1 w - - 0 1)

Onkoud, Abdelaziz

Pat a Mat, 1994

K7/R1p2b2/1kp2p2/p1n4R/Pn6/N3B3/1Q6/1r4b1

#2

7 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Bxc5#
    • 1...Bc4
      • 2.Sxc4#
    • 1...Bxh5
      • 2.Sc4#
    • 1...Bg6
      • 2.Sc4#
    • 1...Be8
      • 2.Sc4#
  • Tries
    • 1.Qe5?
      • threat
        • 2.Qxc7#
        • 2.Qxc5#
      • 1...Bxe3
        • 2.Qxc7#
      • 1...Rc1
        • 2.Qxc7#
      • 1...Bh2
        • 2.Bxc5#
        • 2.Qxc5#
      • 1...Bd5
        • 2.Qxc7#
      • 1...Sd3
        • 2.Qxc7#
      • 1...Sd5
        • 2.Sc4#
      • 1...Sa6
        • 2.Rb7#
      • 1...fxe5!
    • 1.Qxb4+?
      • 1...axb4
        • 2.a5#
      • 1...Rxb4!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qxc7#
      • 1...Bxh2
        • 2.Bxc5#
      • 1...Sd5
        • 2.Sc4#
      • 1...Sa6
        • 2.Rb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD::B(C),XS(e)
    • B(j);N_GUARD::S(B),XB(j)
    • B(j);N_GUARD,XR(E)::S(B)
    • B(j);N_GUARD::S(B)
  • Tries
    • Try
      • Q(A);N_PINS(c),P_PINS(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);N_SPINS(e),XB(C)::QAB1(A),XP(i)
        • R(a);::QAB1(A),XP(i)
        • B(j);::QAB1(A),XP(i)
        • S(c);::QAB1(A),XP(i)
        • S(c);S_CUTB(j)::S(B)
        • S(c);SBLOCK::R1(F)
      • Refutation
        • P(h);XQ(A)
    • Try
      • Q(A);CHECK,P_PINS(e),XS(c)
      • Vars
        • P(d);OGATE,XQ(A)::P(D)
      • Refutation
        • R(a);XQ(A)
  • Actual
    • Q(A);N_PINS(c),P_PINS(e)
    • Threat
      • QAB1(A),XP(i)
    • Vars
      • B(b);N_GUARD,XQ(A)::B(C),XS(e)
      • S(c);S_CUTB(j)::S(B)
      • S(c);SBLOCK::R1(F)
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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).