MESON Chess Problem Database

Problem Display
PID: 120134 (6n1/8/1pR5/1p2k3/1P4Bp/3P3N/2P2P1K/3b2Q1 w - - 0 1)

Stepanov, AS

Nova Svoboda, 1919

6n1/8/1pR5/1p2k3/1P4Bp/3P3N/2P2P1K/3b2Q1

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qe1+?
      • 1...Kd4
        • 2.Rd6#
        • 2.Qe4#
      • 1...Kd5
        • 2.Qe4#
      • 1...Be2!
    • 1.Qg3+?
      • 1...Kd4
        • 2.Qd6#
      • 1...Kd5
        • 2.Rd6#
        • 2.Qd6#
      • 1...hxg3+!
  • Keys
    • 1.Be6!
      • 1...Kd4
        • 2.f4#
      • 1...Kf6
        • 2.Qg5#
      • 1...Bxc2
        • 2.Qa1#
      • 1...Be2
        • 2.Qa1#
      • 1...Bf3
        • 2.Qa1#
      • 1...Bg4
        • 2.Qa1#
      • 1...Bh5
        • 2.Qa1#
      • 1...Sf6
        • 2.f4#
      • 1...Sh6
        • 2.Qg7#
      • 1...Se7
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(A)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR2(A)
      • Refutation
        • P(b);CHECK,XQ(A)
  • Actual
    • B(H);
    • Vars
      • K(d);S_FLIGHT::QAB(A)+P(C)
      • K(d);S_FLIGHT::QAB1(A)
      • B(a);OGATE,XP(B)::QAB(A)
      • B(a);OGATE::QAB(A)
      • S(f);SBLOCK::P(C)
      • S(f);N_GUARD::QAB(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).