MESON Chess Problem Database

Problem Display
PID: 275384 (1b3N2/1bn5/r2Bp1K1/1r4p1/2BkpP2/1qR3R1/2p2p2/N6Q w - - 0 1)

Gajevskis, A

Sachmatija, 2023

1b3N2/1bn5/r2Bp1K1/1r4p1/2BkpP2/1qR3R1/2p2p2/N6Q

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sxc2#
    • 1...Qb4
      • 2.Sxc2#
    • 1...Rba5
      • 2.Sxb3#
    • 1...Rc5
      • 2.Sxb3#
    • 1...Rd5
      • 2.Sxb3#
    • 1...Re5
      • 2.Sxb3#
    • 1...Rf5
      • 2.Sxb3#
    • 1...Sd5
      • 2.Sxe6#
    • 1...Sa8
      • 2.Sxe6#
    • 1...Se8
      • 2.Sxe6#
  • Tries
    • 1.Bc5+?
      • 1...Rxc5
        • 2.Sxb3#
      • 1...Kxc5!
    • 1.Be5+?
      • 1...Rxe5
        • 2.Sxb3#
      • 1...Kc5!
    • 1.Qh8+?
      • 1...Re5
        • 2.Sxb3#
        • 2.Qxe5#
      • 1...e5!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Qxe4#
      • 1...Kxd5
        • 2.Rgd3#
      • 1...Qxd5
        • 2.Sxc2#
      • 1...Rxd5
        • 2.Sxb3#
      • 1...Bxd5
        • 2.Be5#
      • 1...Sxd5
        • 2.Sxe6#
      • 1...exd5
        • 2.Qh8#
      • 1...e3
        • 2.Be5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD::S(A),XP(a)
    • R(f);N_GUARD::S(A),XQ(c)
    • S(k);N_GUARD::S(I),XP(i)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • R(f);XB(G)::S(A),XQ(c)
      • Refutation
        • K(d);S_FLIGHT,XB(G)
    • Try
      • B(G);CHECK
      • Vars
        • R(f);XB(G)::S(A),XQ(c)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • P(i);P_PINB(G),P_SPINP(i)
  • Actual
    • B(E);
    • Threat
      • QAR1(B),XP(e)
    • Vars
      • K(d);P-FLIGHT,P_SPINP(e),XB(E)::R(D)
      • Q(c);N_GUARD,SBLOCK,XB(E)::S(A),XP(a)
      • R(f);N_GUARD,SBLOCK,XB(E)::S(A),XQ(c)
      • B(j);SBLOCK,XB(E)::B(G)
      • S(k);N_GUARD,SBLOCK,XB(E)::S(I),XP(i)
      • P(i);N_GUARD,P_PINB(G),SBLOCK,XB(E)::QAB(B)
      • P(e);::B(G)
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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).