MESON Chess Problem Database

Problem Display
PID: 12130 (3B4/8/4p3/4k3/B1Qp2K1/8/8/8 w - - 0 1)

Tokar, Ivan Vasilovich

2nd Place, Lokker MT, 1975

3B4/8/4p3/4k3/B1Qp2K1/8/8/8

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qxd4#
  • Tries
    • 1.Kf3?
      • threat
        • 2.Qc5#
      • 1...Kd6
        • 2.Qxd4#
      • 1...Kf5!
    • 1.Kg5?
      • 1...Kd6
        • 2.Qxd4#
      • 1...d3
        • 2.Bc7#
      • 1...Ke4!
    • 1.Bb5?
      • 1...Ke4
        • 2.Qxe6#
      • 1...Kd6
        • 2.Qxd4#
      • 1...d3!
    • 1.Bb6?
      • threat
        • 2.Qxd4#
      • 1...Ke4
        • 2.Qxd4#
      • 1...Kd6
        • 2.Qc5#
      • 1...d3
        • 2.Qd4#
      • 1...Kf6!
    • 1.Bf6+?
      • 1...Ke4
        • 2.Qxd4#
      • 1...Kd6
        • 2.Qc6#
      • 1...Kxf6!
    • 1.Qd3?
      • 1...Kd6
        • 2.Qxd4#
      • 1...Kd5!
  • Keys
    • 1.Bb3!
      • threat
        • 2.Qxe6#
      • 1...Ke4
        • 2.Qe2#
      • 1...Kd6
        • 2.Qc7#
      • 1...d3
        • 2.Qf4#

This anticipates 79267(1981)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR2(B),XP(a)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAR2(B)
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
        • P(a);::B(D)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • B(A);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR2(B),XP(c)
        • K(b);S_FLIGHT::QAR2(B),XP(a)
      • Refutation
        • P(a);
    • Try
      • B(D);
      • Threat
        • QAB1(B),XP(a)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR1(B),XP(a)
        • K(b);S_FLIGHT::QAB1(B)
        • P(a);::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR1(B),XP(a)
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XB(D)
    • Try
      • Q(B);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR2(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
  • Actual
    • B(A);
    • Threat
      • QAR1(B),XP(c)
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a)::QAR2(B)
      • K(b);S_FLIGHT::QAB1(B)
      • P(a);OGATE::QAB1(B)
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).