MESON Chess Problem Database

Problem Display
PID: 219027 (8/B4K2/5p2/Q1b2R2/4k3/4P3/8/2N5 w - - 0 1)

Klark, Dmitry Vasilevich

L'Echiquier d'Aix, 1882

8/B4K2/5p2/Q1b2R2/4k3/4P3/8/2N5

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Rf4#
      • 2.Qd5#
    • 1...Bxe3
      • 2.Qd5#
    • 1...Bb4
      • 2.Rf4#
      • 2.Qd5#
    • 1...Bd6
      • 2.Qd5#
    • 1...Be7
      • 2.Rf4#
      • 2.Qd5#
    • 1...Bf8
      • 2.Rf4#
      • 2.Qd5#
  • Tries
    • 1.Rf4+?
      • 1...Kd5
        • 2.Qxc5#
      • 1...Ke5
        • 2.Qxc5#
      • 1...Kxe3!
    • 1.Qa4+?
      • 1...Kxe3
        • 2.Qf4#
      • 1...Kxf5
        • 2.Qf4#
      • 1...Bb4
        • 2.Qc2#
      • 1...Bd4!
    • 1.Qb5?
      • threat
        • 2.Qd3#
      • 1...Kxe3
        • 2.Qd3#
      • 1...Kxf5!
    • 1.Qa6?
      • threat
        • 2.Qd3#
        • 2.Qe6#
      • 1...Kxe3
        • 2.Qd3#
      • 1...Bd4
        • 2.Qd3#
      • 1...Bb6
        • 2.Qd3#
      • 1...Bd6
        • 2.Qd3#
      • 1...Kxf5!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qf4#
      • 1...Kxe3
        • 2.Qf4#
      • 1...Kxf5
        • 2.Qf4#
      • 1...Bxe3
        • 2.Qc2#
      • 1...Bd6
        • 2.Qc2#

FEATURES

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