MESON Chess Problem Database

Problem Display
PID: 87948 (8/1p3p2/1B3K2/3p1Rp1/3Pk1p1/3p1rp1/4nPBb/1n1NQ2N w - - 0 1)

Berghmans, Josef

2nd Prize, Vlaamse Problemistenbond, 1929

8/1p3p2/1B3K2/3p1Rp1/3Pk1p1/3p1rp1/4nPBb/1n1NQ2N

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Sxg3#
    • 1...Sd2
      • 2.Sc3#
    • 1...Sa3
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...d2
      • 2.Qxe2#
    • 1...gxf2
      • 2.Shxf2#
  • Tries
    • 1.Kxg5?
      • threat
        • 2.Rf4#
        • 2.Re5#
      • 1...gxf2
        • 2.Shxf2#
      • 1...d2
        • 2.Qxe2#
      • 1...f6+!
    • 1.Rxf3?
      • threat
        • 2.Rf5#
      • 1...Sd2
        • 2.Sc3#
      • 1...d2
        • 2.Qxe2#
      • 1...gxf3!
    • 1.fxg3?
      • threat
        • 2.Shf2#
      • 1...Bxg3
        • 2.Sxg3#
      • 1...Bg1!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qe7#
      • 1...Sxd4
        • 2.Qxd4#
      • 1...gxf2
        • 2.Shxf2#
      • 1...d2
        • 2.Qxb1#
      • 1...Sf4
        • 2.Re5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(c);N_GUARD::S(C),XP(f)
    • S(a);N_GUARD::S(A)
    • S(a);N_GUARD::S(A),XS(a)
    • P(d);N_GUARD::QAR2(B),XS(b)
    • P(f);XP(D)::S(C),XP(f)
  • Tries
    • Try
      • K(I);N_SPINR(G),S_FLIGHT,XP(j)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XP(D)::S(C),XP(f)
        • P(d);N_GUARD::QAR2(B),XS(b)
      • Refutation
        • P(l);CHECK
    • Try
      • R(G);N_SPINR(G),XR(e)
      • Threat
        • B(E)+R(G)
      • Vars
        • S(a);N_GUARD::S(A)
        • P(d);N_GUARD::QAR2(B),XS(b)
      • Refutation
        • P(h);P_SPINP(h),XR(G)
    • Try
      • P(D);XP(f)
      • Threat
        • S(C)
      • Vars
        • B(c);XP(D)::S(C),XB(c)
      • Refutation
        • B(c);
  • Actual
    • Q(B);N_PINS(b)
    • Threat
      • QAR(B)
    • Vars
      • S(b);OGATE,P_SPINS(b),XP(F)::QAR1(B),XS(b)
      • P(f);XP(D)::S(C),XP(f)
      • P(d);OGATEB::QAB(B),XS(a)
      • S(b);N_PINR(G),SBLOCK::R1(G)
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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).