MESON Chess Problem Database

Problem Display
PID: 268076 (6b1/Q4p2/1Rpp1K2/nn1k1p2/1B3p1R/3BPP2/8/5r2 w - - 0 1)

Onkoud, Abdelaziz

64 Shakhmatnoe obozrenie, 2023

6b1/Q4p2/1Rpp1K2/nn1k1p2/1B3p1R/3BPP2/8/5r2

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bh7
      • 2.Qxf7#
    • 1...Sb7
      • 2.Qa2#
  • Tries
    • 1.Rxf4?
      • threat
        • 2.Rxf5#
      • 1...Bh7
        • 2.Qxf7#
      • 1...Sc4
        • 2.Bxc4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Rxf3!
    • 1.Rh5?
      • threat
        • 2.Rxf5#
      • 1...Bh7
        • 2.Qxf7#
      • 1...Sc4
        • 2.Be4#
      • 1...Sd4
        • 2.e4#
      • 1...fxe3!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxf5#
      • 1...Bh7
        • 2.Qxf7#
      • 1...Sc4
        • 2.Qxc6#
      • 1...Sd4
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(j);N_GUARD::QAB(H),XP(i)
    • S(c);OGATE::QAB(H)
  • Tries
    • Try
      • R(E);XP(b)
      • Threat
        • R(E),XP(f)
      • Vars
        • B(j);N_GUARD::QAB(H),XP(i)
        • S(c);N_GUARD::B(A),XS(c)
        • S(d);N_GUARD::R1(E),XS(d)
      • Refutation
        • R(a);XP(C)
    • Try
      • R(E);P_PINP(f)
      • Threat
        • R(E),XP(f)
      • Vars
        • B(j);N_GUARD::QAB(H),XP(i)
        • S(c);SBLOCK::B(A)
        • S(d);SBLOCK::P(B)
      • Refutation
        • P(b);XP(B)
  • Actual
    • Q(H);P_PINP(h)
    • Threat
      • QAR2(H),XP(f)
    • Vars
      • B(j);N_GUARD::QAB(H),XP(i)
      • S(c);N_GUARD::QAB1(H),XP(g)
      • S(d);N_GUARD::QAR1(H),XP(h)
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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).