MESON Chess Problem Database

Problem Display
PID: 160659 (8/3n3R/8/kB1N4/P5b1/8/K2b4/5Q2 w - - 0 1)

Akimov, Nikolai Nikolaevich

Sachsische Zeitung, 2015

8/3n3R/8/kB1N4/P5b1/8/K2b4/5Q2

#2

6 + 4

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Qxe1#
    • 1...Se5
      • 2.Ra7#
    • 1...Sb6
      • 2.Ra7#
    • 1...Sf6
      • 2.Ra7#
    • 1...Sf8
      • 2.Ra7#
  • Tries
    • 1.Ba6?
      • threat
        • 2.Qb5#
      • 1...Kxa4
        • 2.Qb5#
      • 1...Be2!
    • 1.Qe1?
      • threat
        • 2.Qxd2#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bb4
        • 2.Qxb4#
      • 1...Bxe1!
    • 1.Qf2?
      • threat
        • 2.Qa7#
        • 2.Qxd2#
      • 1...Bc1
        • 2.Qa7#
      • 1...Be1
        • 2.Qxe1#
        • 2.Qa7#
      • 1...Bc3
        • 2.Qa7#
      • 1...Bb4
        • 2.Qa7#
      • 1...Bf4
        • 2.Qa7#
      • 1...Bg5
        • 2.Qa7#
      • 1...Bh6
        • 2.Qa7#
      • 1...Be2
        • 2.Qa7#
      • 1...Sc5
        • 2.Qxd2#
      • 1...Sb6
        • 2.Ra7#
        • 2.Qxb6#
        • 2.Qxd2#
      • 1...Sb8
        • 2.Qb6#
        • 2.Qxd2#
      • 1...Be3!
    • 1.Qf6?
      • threat
        • 2.Qa6#
      • 1...Sxf6
        • 2.Ra7#
      • 1...Sc5
        • 2.Qd8#
        • 2.Qb6#
      • 1...Sb6
        • 2.Ra7#
        • 2.Qxb6#
      • 1...Sb8
        • 2.Qd8#
        • 2.Qb6#
      • 1...Be6!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qa8#
      • 1...Sxf8
        • 2.Ra7#
      • 1...Be3
        • 2.Qb4#
      • 1...Sc5
        • 2.Qd8#
      • 1...Sb6
        • 2.Ra7#
      • 1...Sb8
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(a);OGATEB::QAB(A),XB(a)
    • S(d);OGATE::R(F)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT,XP(C)::QAB1(A)
      • Refutation
        • B(b);
    • Try
      • Q(A);P_PINB(a)
      • Threat
        • QAB(A),XB(a)
      • Vars
        • B(a);OGATE::QAB(A),XB(a)
        • B(a);OGATE::QAB1(A),XB(a)
      • Refutation
        • B(a);N_SPINB(a),XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAR2(A)
        • B(b);::QAR2(A)
        • S(d);::QAB(A),XB(a)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(d);OGATE,XQ(A)::R(F)
      • Refutation
        • B(b);P_PINS(E)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • S(d);OGATE,XQ(A)::R(F)
      • B(a);N_GUARD::QAB1(A)
      • S(d);N_GUARD::QAB(A)
      • S(d);OGATE::R(F)
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).