MESON Chess Problem Database

Problem Display
PID: 83510 (1Bk2qbR/KN1p4/1R1p1QNb/1p5B/p7/2p5/8/3rr3 w - - 0 1)

Ellerman, Arnoldo

4th Prize, Good Companions (February), 1919

1Bk2qbR/KN1p4/1R1p1QNb/1p5B/p7/2p5/8/3rr3

#2

8 + 11

3391 Het Half Pin Thema 1924
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe7
      • 2.Qxc3#
    • 1...Qg7
      • 2.Qd8#
    • 1...Qf7
      • 2.Qd8#
    • 1...Qd8
      • 2.Qxd8#
    • 1...Re6
      • 2.Qxc3#
    • 1...Be3
      • 2.Qxf8#
    • 1...Bd5
      • 2.Sxd6#
    • 1...Be6
      • 2.Se7#
    • 1...Bh7
      • 2.Qxc3#
  • Tries
    • 1.Se7+?
      • 1...Qxe7
        • 2.Qxc3#
      • 1...Rxe7!
    • 1.Qxf8+?
      • 1...Re8
        • 2.Se7#
        • 2.Qxe8#
      • 1...Bxf8!
  • Keys
    • 1.Bg4!
      • threat
        • 2.Rc6#
      • 1...Qd8
        • 2.Qxd8#
      • 1...Re6
        • 2.Qxc3#
      • 1...Be3
        • 2.Qxf8#
      • 1...Bd5
        • 2.Sxd6#
      • 1...Be6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(j);P_SPINB(k)::QAR(C),XP(c)
    • Q(j);N_GUARD,P_SPINB(k)::QAR1(C)
    • Q(j);N_GUARD::QAR1(C),XQ(j)
    • R(b);S_CUTB(k)::QAR(C),XP(c)
    • B(g);N_GUARD,P_PINR(B),S_CUTR(b)::QAR(C),XQ(j)
    • B(k);P_SPINQ(j),S_CUTR(a)::S(F),XP(f)
    • B(k);P_SPINQ(j),S_CUTR(b)::S(D)
    • B(k);N_GUARD,P_SPINQ(j)::QAR(C),XP(c)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • Q(j);P_SPINB(k),XS(D)::QAR(C),XP(c)
      • Refutation
        • R(b);XS(D)
    • Try
      • Q(C);CHECK,XQ(j)
      • Refutation
        • B(g);XQ(C)
  • Actual
    • B(A);P_PINP(h)
    • Threat
      • R(B)
    • Vars
      • Q(j);N_GUARD::QAR1(C),XQ(j)
      • R(b);N_SPINP(h),S_CUTB(k)::QAR(C),XP(c)
      • B(g);N_GUARD,P_PINR(B),S_CUTR(b)::QAR(C),XQ(j)
      • B(k);P_SPINQ(j),S_CUTR(a)::S(F),XP(f)
      • B(k);N_SPINP(h),P_SPINQ(j),S_CUTR(b)::S(D)
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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).