MESON Chess Problem Database

Problem Display
PID: 238262 (Q7/8/2R5/N1R1K3/pk6/8/8/8 w - - 0 1)

Murashev, Pavel Aleksandrovich

ChessStar, 2019

Q7/8/2R5/N1R1K3/pk6/8/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rc2?
      • 1...Ka3
        • 2.Qf8#
      • 1...Kb5
        • 2.Rb2#
      • 1...a3!
    • 1.Rc4+?
      • 1...Kb5
        • 2.Qa6#
      • 1...Ka3!
    • 1.Rd5?
      • threat
        • 2.Qf8#
      • 1...a3
        • 2.Rc4#
      • 1...Ka3!
    • 1.Rb6+?
      • 1...Kxc5
        • 2.Qc6#
      • 1...Ka3!
    • 1.Rc7?
      • 1...a3
        • 2.Qe4#
      • 1...Ka3!
    • 1.Rc8?
      • 1...a3
        • 2.Qe4#
      • 1...Ka3!
    • 1.Qa6?
      • 1...a3
        • 2.Rc4#
        • 2.Qc4#
        • 2.Qb5#
      • 1...Ka3!
    • 1.Qc8?
      • 1...a3
        • 2.Qg4#
      • 1...Ka3!
    • 1.Qd8?
      • 1...a3
        • 2.Qh4#
        • 2.Qd4#
      • 1...Ka3!
    • 1.Qg8?
      • 1...a3
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qg4#
      • 1...Ka3!
    • 1.Qh8?
      • 1...a3
        • 2.Qh4#
      • 1...Ka3!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Rd5#
      • 1...Ka3
        • 2.Rc2#
      • 1...a3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Vars
        • K(b);S_FLIGHT::QAB(E)
        • K(b);P-FLIGHT::R(B)
      • Refutation
        • P(a);
    • Try
      • R(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(B);
      • Threat
        • QAB(E)
      • Vars
        • P(a);SBLOCK::R1(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(B)::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);
      • Vars
        • P(a);SBLOCK::QAR(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);
      • Vars
        • P(a);SBLOCK::QAR(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(a);SBLOCK::QAR(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(a);SBLOCK::QAR(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB(E)+R(B)
    • Vars
      • K(b);S_FLIGHT::QAB(E)+R(B)
      • P(a);SBLOCK::QAR(E)
HTML5 logo

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).