MESON Chess Problem Database

Problem Display
PID: 83530 (B3b1r1/4RR1q/K4n1r/1p1PN1p1/4k1p1/3p2P1/5BNp/2nQ4 w - - 0 1)

Ellerman, Arnoldo

Tijdschrift vd NSB, 1919

B3b1r1/4RR1q/K4n1r/1p1PN1p1/4k1p1/3p2P1/5BNp/2nQ4

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qxg4#
    • 1...Sa2
      • 2.Qxd3#
    • 1...Se2
      • 2.Qxd3#
    • 1...Sb3
      • 2.Qxd3#
    • 1...Sxd5+
      • 2.Sg6#
    • 1...Sh5+
      • 2.Sg6#
    • 1...Sd7+
      • 2.d6#
  • Tries
    • 1.d6+?
      • 1...Kf5
        • 2.Se3#
        • 2.Qxg4#
      • 1...Sd5
        • 2.Sg6#
        • 2.Qxg4#
      • 1...Bc6!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Sh4#
      • 1...Sxd5+
        • 2.Sg6#
      • 1...Sh5+
        • 2.Sg6#
      • 1...Sd7+
        • 2.d6#
      • 1...Kf5
        • 2.Se3#
      • 1...Qf5
        • 2.Sf4#
      • 1...Rh4
        • 2.Sxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(d);P_SPINS(h),S_FLIGHT::QAB1(A),XP(e)
    • S(a);N_GUARD::QAB1(A),XP(c)
    • S(h);CHECK,P_SPINS(h),XP(E)::R(H)+S(F)
    • S(h);CHECK::R(H)+S(F)
    • S(h);CHECK,N_GUARD,S_CUTB(k)::B(J)+P(E)
  • Tries
    • Try
      • P(E);CHECK
      • Refutation
        • B(k);P_SPINB(k)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+S(C)
    • Vars
      • S(h);CHECK,P_SPINS(h),XP(E)::R(H)+S(F)
      • S(h);CHECK::R(H)+S(F)
      • S(h);CHECK,N_GUARD,S_CUTB(k)::B(J)+P(E)
      • K(d);P_SPINS(h),S_FLIGHT::S(C)
      • Q(j);SBLOCK::QAB(A)+S(C)
      • R(i);::QAB(A)+S(C),XR(i)
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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).