MESON Chess Problem Database

Problem Display
PID: 140266 (8/8/8/8/5Q2/2p5/8/kbK5 w - - 0 1)

Paradzinsky, Oleg

StrateGems, 2003

8/8/8/8/5Q2/2p5/8/kbK5

#2

2 + 3

5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ka2
      • 2.Qa4#
    • 1...Bd3
      • 2.Qa4#
    • 1...Bf5
      • 2.Qa4#
    • 1...Bg6
      • 2.Qa4#
    • 1...Bh7
      • 2.Qa4#
  • Tries
    • 1.Qd4?
      • 1...Ka2
        • 2.Qa4#
      • 1...Ba2
        • 2.Qxc3#
      • 1...Bd3
        • 2.Qa4#
      • 1...Be4
        • 2.Qa7#
        • 2.Qa4#
      • 1...Bf5
        • 2.Qa7#
        • 2.Qa4#
      • 1...Bg6
        • 2.Qa7#
        • 2.Qa4#
      • 1...Bh7
        • 2.Qa7#
        • 2.Qa4#
      • 1...Bc2!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qxb1#
      • 1...Ka2
        • 2.Qa4#
      • 1...Bc2
        • 2.Qa3#
      • 1...Ba2
        • 2.Qxc3#
      • 1...Bd3
        • 2.Qa3#
        • 2.Qa5#
        • 2.Qa4#
      • 1...Be4
        • 2.Qa3#
        • 2.Qa5#
        • 2.Qa4#
      • 1...Bf5
        • 2.Qa3#
        • 2.Qa5#
        • 2.Qa4#
      • 1...Bg6
        • 2.Qa3#
        • 2.Qa5#
        • 2.Qa4#
      • 1...Bh7
        • 2.Qa3#
        • 2.Qa5#
        • 2.Qa4#
      • 1...c2
        • 2.Qb2#

Anticipated by 222412(1884)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • K(a);P-FLIGHT::QAR2(B)
    • B(b);N_GUARD::QAR(B)
  • Tries
    • Try
      • Q(B);P_PINP(c)
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::QAR2(B)
        • B(b);SBLOCK::QAB(B),XP(c)
        • B(b);N_GUARD::QAR(B)
      • Refutation
        • B(b);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XB(b)
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
      • B(b);N_GUARD::QAR2(B)
      • B(b);SBLOCK::QAB(B),XP(c)
      • P(c);N_GUARD::QAB1(B)
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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).