MESON Chess Problem Database

Problem Display
PID: 202474 (B3Nq2/2b1N2b/1pP1Rp2/4n3/1RP1k2r/2B1p1Pp/1rP5/5Q1K w - - 0 1)

Kuijers, LA

Algemeen Handelsblad, 1923

B3Nq2/2b1N2b/1pP1Rp2/4n3/1RP1k2r/2B1p1Pp/1rP5/5Q1K

#2

12 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qg8
      • 2.Sxf6#
    • 1...Ra2
      • 2.c5#
    • 1...Rxc2
      • 2.c5#
    • 1...Rf4
      • 2.Qxf4#
    • 1...Rh5
      • 2.Qf4#
    • 1...Rh6
      • 2.Qf4#
    • 1...Bd6
      • 2.Sxd6#
      • 2.c7#
    • 1...Bb8
      • 2.c7#
    • 1...Bd8
      • 2.Sd6#
      • 2.c7#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bg8
      • 2.Qf5#
    • 1...e2
      • 2.Qxe2#
    • 1...h2
      • 2.Qg2#
  • Tries
    • 1.Bxb2?
      • threat
        • 2.c5#
      • 1...e2
        • 2.Qxe2#
      • 1...Qxe7!
    • 1.Rxe5+?
      • 1...Bxe5
        • 2.c7#
      • 1...fxe5!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Rd4#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...Sxc4
        • 2.Rxc4#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...e2
        • 2.Qxe2#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sf3
        • 2.Qd3#
      • 1...Sg4
        • 2.Qf4#
      • 1...Sg6
        • 2.Qf5#
      • 1...Sd7
        • 2.cxd7#
      • 1...Sf7
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 10
  • Sets
    • Q(k);N_GUARD::S(L),XP(h)
    • R(a);N_GUARD::R(F)+P(G)
    • R(a);N_GUARD,XP(C)::R(F)+P(G)
    • R(e);N_GUARD::QAR1(A),XR(e)
    • R(e);N_GUARD::QAR1(A)
    • B(i);OGATE::B(K)+P(H)
    • B(j);N_GUARD::QAB1(A),XB(j)
    • B(j);N_GUARD::QAB1(A)
    • P(b);OGATEB::QAR2(A),XP(b)
    • P(c);N_GUARD::QAB(A)
  • Tries
    • Try
      • B(D);XR(a)
      • Threat
        • R(F)+P(G)
      • Vars
        • P(b);OGATEB::QAR2(A),XP(b)
      • Refutation
        • Q(k);XS(J)
    • Try
      • R(I);CHECK,XS(f)
      • Vars
        • B(i);OGATE,XR(I)::B(K)+P(H)
      • Refutation
        • P(h);XR(I)
  • Actual
    • R(I);N_PINS(f)
    • Threat
      • R1(I)
    • Vars
      • B(i);XR(I)::S(L),XB(i)
      • S(f);OGATE,P_SPINS(f),XP(G)::R(F),XS(f)
      • S(f);OGATE,P_SPINS(f),XP(H)::B(K),XS(f)
      • P(b);OGATEB::QAR2(A),XP(b)
      • S(f);OGATE::P(C),XS(f)
      • S(f);N_GUARD,SBLOCK::QAB1(A)
      • S(f);S_CUTR(e)::QAR1(A)
      • S(f);S_CUTB(j)::QAB1(A)
      • S(f);OGATE::B(K)+P(H),XS(f)
      • S(f);S_CUTQ(k)::S(L),XP(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).