MESON Chess Problem Database

Problem Display
PID: 107658 (2KRQb2/Np6/p7/B1k2r2/1n2P3/1p6/p2P4/5R2 w - - 0 1)

Bakcsi, Gyorgy

Lengyel-Magyar, 1984

2KRQb2/Np6/p7/B1k2r2/1n2P3/1p6/p2P4/5R2

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Rc1#
  • Tries
    • 1.Bb6+?
      • 1...Kc4
        • 2.Rd4#
      • 1...Kxb6!
    • 1.Qc6+?
      • 1...Sxc6
        • 2.Rc1#
      • 1...bxc6!
    • 1.Qe5+?
      • 1...Kc4
        • 2.Rd4#
        • 2.Qc3#
        • 2.Qd4#
      • 1...Sd5
        • 2.Rc1#
      • 1...Rxe5!
    • 1.Qxf8+?
      • 1...Kc4
        • 2.Qxb4#
      • 1...Rxf8!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qxb4#
      • 1...Kc4
        • 2.Rc1#
      • 1...Sc2
        • 2.Rxf5#
      • 1...Sd3
        • 2.Qd4#
      • 1...Sd5
        • 2.d4#
      • 1...Sc6
        • 2.Rc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::R(A)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(d);P-FLIGHT::R1(G)
      • Refutation
        • K(d);S_FLIGHT,XB(D)
    • Try
      • Q(H);CHECK
      • Vars
        • S(c);XQ(H)::R(A)
      • Refutation
        • P(g);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • S(c);P_SPINS(c)::R(A)
      • Refutation
        • R(e);XQ(H)
    • Try
      • Q(H);CHECK,XB(h)
      • Vars
        • K(d);OGATE,P-FLIGHT::QAR1(H),XS(c)
      • Refutation
        • R(e);P_PINR(G),XQ(H)
  • Actual
    • Q(H);
    • Threat
      • QAB1(H),XS(c)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(c)::R(A)
      • S(c);N_GUARD::R(A),XR(e)
      • S(c);OGATE::QAB1(H)
      • S(c);::P(B)
      • S(c);N_GUARD::R(A)
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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).