MESON Chess Problem Database

Problem Display
PID: 172346 (Q7/8/8/8/6B1/1K2b3/3k1n2/6R1 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

Q7/8/8/8/6B1/1K2b3/3k1n2/6R1

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Rxd1#
    • 1...Sh1
      • 2.Rd1#
    • 1...Sd3
      • 2.Rd1#
    • 1...Sh3
      • 2.Rd1#
    • 1...Se4
      • 2.Rd1#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qe2#
      • 1...Sxg4
        • 2.Rd1#
        • 2.Qd1#
      • 1...Sd1
        • 2.Rxd1#
        • 2.Qxd1#
      • 1...Kd3!
    • 1.Qd5+?
      • 1...Sd3
        • 2.Rd1#
      • 1...Bd4!
    • 1.Qa6?
      • threat
        • 2.Qe2#
      • 1...Sd1
        • 2.Rxd1#
      • 1...Sd3
        • 2.Rd1#
      • 1...Sxg4!
    • 1.Qd8+?
      • 1...Sd3
        • 2.Rd1#
      • 1...Bd4!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qc2#
      • 1...Sxe4
        • 2.Rd1#
      • 1...Bd4
        • 2.Qe2#
      • 1...Bf4
        • 2.Qe2#
      • 1...Bc5
        • 2.Qe2#
      • 1...Bg5
        • 2.Qe2#
      • 1...Bb6
        • 2.Qe2#
      • 1...Bh6
        • 2.Qe2#
      • 1...Ba7
        • 2.Qe2#
      • 1...Sd3
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::R1(A),XS(b)
    • S(b);N_GUARD::R1(A)
    • S(b);N_GUARD,SBLOCK::R1(A)
  • Tries
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINB(c)
    • Try
      • Q(D);CHECK
      • Vars
        • S(b);P_SPINS(b)::R1(A)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • S(b);N_GUARD::R1(A),XS(b)
        • S(b);N_GUARD::R1(A)
      • Refutation
        • S(b);XB(C)
    • Try
      • Q(D);CHECK
      • Vars
        • S(b);P_SPINS(b)::R1(A)
      • Refutation
        • B(c);P_SPINB(c)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D)
    • Vars
      • S(b);N_GUARD,XQ(D)::R1(A)
      • B(c);OGATE::QAR1(D)
      • S(b);N_GUARD::R1(A)
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).