MESON Chess Problem Database

Problem Display
PID: 172506 (2B5/8/2Qbr3/4k1N1/8/4K3/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2001

2B5/8/2Qbr3/4k1N1/8/4K3/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Qe4#
    • 1...Ba3
      • 2.Qxe6#
    • 1...Bb4
      • 2.Qxe6#
    • 1...Bc7
      • 2.Qxe6#
    • 1...Be7
      • 2.Qxe6#
    • 1...Bb8
      • 2.Qxe6#
    • 1...Bf8
      • 2.Qxe6#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Sf7#
      • 1...Rf6
        • 2.Qe4#
      • 1...Re7
        • 2.Qf5#
      • 1...Bc5+!
    • 1.Qc3+?
      • 1...Kd5+
        • 2.Bxe6#
      • 1...Kf5+!
  • Keys
    • 1.Sh7!
      • threat
        • 2.Qe4#
      • 1...Kf5+
        • 2.Qe4#
      • 1...Bc5+
        • 2.Qxc5#
      • 1...Ba3
        • 2.Qxe6#
      • 1...Bb4
        • 2.Qxe6#
      • 1...Bc7
        • 2.Qc5#
        • 2.Qxe6#
      • 1...Be7
        • 2.Qxe6#
      • 1...Bb8
        • 2.Qc5#
        • 2.Qxe6#
      • 1...Bf8
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(c);SBLOCK::QAR1(C)
    • B(b);OGATE::QAR1(C),XR(c)
  • Tries
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • R(c);SBLOCK::QAR1(C)
        • R(c);::QAR1(C)
      • Refutation
        • B(b);CHECK
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);CHECK,P-FLIGHT::B(D),XR(c)
      • Refutation
        • K(a);CHECK,P-FLIGHT,P_SPINR(c)
  • Actual
    • S(B);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);CHECK,P-FLIGHT,P_SPINR(c)::QAB1(C)
      • B(b);CHECK,N_GUARD::QAR2(C),XB(b)
      • B(b);OGATE::QAR1(C),XR(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).