MESON Chess Problem Database

Problem Display
PID: 183339 (8/N2pp1Q1/3k4/4R3/4K3/8/8/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kudesnik, 2018

8/N2pp1Q1/3k4/4R3/4K3/8/8/8

#2

4 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rd5+?
      • 1...Ke6
        • 2.Qg6#
      • 1...Kc7!
    • 1.Rxe7?
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Qd4#
      • 1...Kc7!
    • 1.Qg1?
      • threat
        • 2.Qc5#
        • 2.Qb6#
      • 1...e6
        • 2.Qc5#
      • 1...Kc7!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Qe5#
      • 1...Kxc5
        • 2.Qd4#
      • 1...Ke6
        • 2.Qg6#
      • 1...e6
        • 2.Qf8#
      • 1...e5
        • 2.Qxe5#

Anticipated by 175474(1899), 233321(1985)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);XP(c)
      • Threat
        • QAB1(D)
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • QAB1(D)
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAB1(D)
      • K(a);P-FLIGHT::QAR2(D)
      • P(c);OGATEB,SBLOCK::QAB(D)
      • P(c);::QAB1(D),XP(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).