MESON Chess Problem Database

Problem Display
PID: 263101 (n5K1/6Np/2p5/3kPpR1/1Q3p2/1b6/3PR3/1r6 w - - 0 1)

Koshel, Mikhail Igorevich

SuperProblem, 2020

n5K1/6Np/2p5/3kPpR1/1Q3p2/1b6/3PR3/1r6

#2

7 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bc4
      • 2.Qd6#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sxf4#
      • 1...Kxe6
        • 2.Qd6#
      • 1...Rf1
        • 2.Qxb3#
      • 1...Bc4
        • 2.Qd6#
      • 1...f3
        • 2.Sf4#
      • 1...c5!
    • 1.Rxf5?
      • threat
        • 2.e6#
      • 1...Bc4
        • 2.Qd6#
      • 1...c5
        • 2.Qe4#
      • 1...Bc2!
    • 1.Qxb3+?
      • 1...Kd4
        • 2.Se6#
      • 1...Kc5
        • 2.Se6#
      • 1...Rxb3!
    • 1.d4?
      • threat
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...Rc1!
  • Keys
    • 1.Re4!
      • threat
        • 2.Qd4#
      • 1...fxe4
        • 2.e6#
      • 1...Bc4
        • 2.Qxc4#
      • 1...c5
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::QAR1(C)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F),XP(c)
      • Vars
        • K(d);N_GUARD,S_FLIGHT,XS(F)::QAR1(C)
        • R(a);N_GUARD::QAB(C),XB(b)
        • B(b);SBLOCK::QAR1(C)
        • P(c);::S(F)
      • Refutation
        • P(f);
    • Try
      • R(E);XP(e)
      • Threat
        • R(E)+P(D)
      • Vars
        • B(b);SBLOCK::QAR1(C)
        • P(f);SBLOCK::QAB1(C)
      • Refutation
        • B(b);
    • Try
      • Q(C);CHECK,XB(b)
      • Vars
        • K(d);P-FLIGHT,S_CUTR(a)::S(F)
      • Refutation
        • R(a);XQ(C)
    • Try
      • P(A);
      • Threat
        • QAR1(C)
      • Vars
        • P(f);::QAR1(C),XP(f)
      • Refutation
        • R(a);
  • Actual
    • R(B);
    • Threat
      • QAR1(C)
    • Vars
      • P(e);XR(B)::R(E)+P(D)
      • B(b);N_GUARD::QAB1(C),XB(b)
      • P(f);OGATEB,SBLOCK::QAB(C)
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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).