MESON Chess Problem Database

Problem Display
PID: 101366 (2q2r2/1PPp2b1/R4pp1/4kP1n/3pB3/2PP2P1/1K4Pr/4QR2 w - - 0 1)

Janet, Frank

Good Companions, 1919

2q2r2/1PPp2b1/R4pp1/4kP1n/3pB3/2PP2P1/1K4Pr/4QR2

#2

12 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb7+
      • 2.Bxb7#
    • 1...Rxg2+
      • 2.Bxg2#
    • 1...Sxg3
      • 2.Qxg3#
    • 1...Sf4
      • 2.gxf4#
    • 1...dxc3+
      • 2.Qxc3#
    • 1...gxf5
      • 2.Bf3#
      • 2.Rxf5#
    • 1...d6
      • 2.Bc6#
  • Tries
    • 1.Ra5+?
      • 1...d5
        • 2.Rxd5#
      • 1...Kd6!
  • Keys
    • 1.fxg6!
      • threat
        • 2.Rf5#
      • 1...Qxb7+
        • 2.Bxb7#
      • 1...Rxg2+
        • 2.Bxg2#
      • 1...dxc3+
        • 2.Qxc3#
      • 1...Sxg3
        • 2.Qxg3#
      • 1...d6
        • 2.Bc6#
      • 1...Sf4
        • 2.gxf4#
      • 1...f5
        • 2.Bf3#
      • 1...d5
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(i);CHECK,OGATE,XP(K)::QAR(A)+B(H),XQ(i)
    • R(a);CHECK,OGATE,XP(D)::QAR(A)+B(H),XR(a)
    • S(d);OGATE,XP(G)::QAB(A),XS(d)
    • S(d);OGATE::P(G),XS(d)
    • P(b);CHECK,OGATE,XP(E)::QAB(A),XP(b)
    • P(g);SBLOCK::QAR(A)+B(H)
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • P(g);P_SPINP(g)::R1(J),XP(g)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • P(I);XP(f)
    • Threat
      • R1(B)
    • Vars
      • Q(i);CHECK,OGATE,XP(K)::QAR(A)+B(H),XQ(i)
      • R(a);CHECK,OGATE,XP(D)::QAR(A)+B(H),XR(a)
      • P(b);CHECK,OGATE,XP(E)::QAB(A),XP(b)
      • S(d);OGATE,XP(G)::QAB(A),XS(d)
      • P(g);SBLOCK::QAR(A)+B(H)
      • S(d);OGATE::P(G),XS(d)
      • P(e);SBLOCK::QAR(A)+B(H)
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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).