MESON Chess Problem Database

Problem Display
PID: 169310 (4b3/6p1/7Q/5P1q/6Pk/5B2/7K/8 w - - 0 1)

Khramtsevich, Mikhail Nikolaevich

Comm., SuperProblem 186. TT, 2017

4b3/6p1/7Q/5P1q/6Pk/5B2/7K/8

#2

5 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Qxh5#
    • 1...Bb5
      • 2.Qxh5#
    • 1...Bc6
      • 2.Qxh5#
    • 1...Bd7
      • 2.Qxh5#
  • Tries
    • 1.gxh5?
      • threat
        • 2.Qf4#
      • 1...Bxh5
        • 2.Qxh5#
      • 1...g5
        • 2.hxg5 ep#
      • 1...gxh6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.gxh5#
      • 1...Qxg4
        • 2.Qxg4#
      • 1...Qxf5
        • 2.gxf5#
      • 1...Qg6
        • 2.g5#
      • 1...Qf7
        • 2.g5#
      • 1...Qg5
        • 2.Qg3#
      • 1...Qh6
        • 2.g5#
      • 1...Qh7
        • 2.g5#
      • 1...Qh8
        • 2.g5#
      • 1...g5
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 4
  • Sets
    • B(d);N_GUARD,SBLOCK::QAR1(E),XQ(b)
    • B(d);N_GUARD::QAR1(E),XQ(b)
  • Tries
    • Try
      • P(C);XQ(b)
      • Threat
        • QAR2(E)
      • Vars
        • B(d);OGATE,P_SPINB(d),XP(C)::QAR1(E),XB(d)
        • P(c);OGATE::QAR(E)+P(C),XP(c),EP
      • Refutation
        • P(c);XQ(E)
  • Actual
    • Q(E);N_PINQ(b)
    • Threat
      • QAR(E)+P(C),XQ(b)
    • Vars
      • Q(b);OGATE,P_SPINQ(b),XP(C)::QAR1(E),XQ(b)
      • Q(b);OGATE,XP(D)::QAR(E)+P(C),XQ(b)
      • Q(b);N_GUARD::QAR(E)+P(C)
      • Q(b);SBLOCK::QAB1(E)
      • P(c);SBLOCK::QAB1(E)
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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).