MESON Chess Problem Database

Problem Display
PID: 8127 (3n4/KQ2p1r1/2pP1bR1/2pB1k1P/2N3p1/2P4n/1R4N1/2B5 w - - 0 1)

van Woerden, Jan

Sinfonie Scacchistiche, 1995

3n4/KQ2p1r1/2pP1bR1/2pB1k1P/2N3p1/2P4n/1R4N1/2B5

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc3
      • 2.Sh4#
    • 1...Bd4
      • 2.Sh4#
    • 1...Bh4
      • 2.Sxh4#
    • 1...Be5
      • 2.Sh4#
      • 2.Sce3#
    • 1...Sf2
      • 2.Rxf2#
    • 1...Sf4
      • 2.Sge3#
    • 1...Sg5
      • 2.Sh4#
    • 1...e5
      • 2.Sce3#
  • Tries
    • 1.Rf2+?
      • 1...Sf4
        • 2.Sge3#
        • 2.Rxf4#
        • 2.Qb1#
      • 1...Sxf2!
    • 1.Rg5+?
      • 1...Rxg5
        • 2.Sh4#
      • 1...Sxg5
        • 2.Sh4#
      • 1...Bxg5!
    • 1.Rxf6+?
      • 1...exf6
        • 2.Sh4#
      • 1...Kxf6!
    • 1.Qc8+?
      • 1...Se6
        • 2.Qxe6#
      • 1...e6+!
    • 1.Qd7+?
      • 1...Se6
        • 2.Qxe6#
      • 1...e6!
  • Keys
    • 1.Re2!
      • threat
        • 2.Qb1#
      • 1...Sxb7
        • 2.Be6#
      • 1...exd6
        • 2.Sxd6#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Sf4
        • 2.Sge3#
      • 1...Sg5
        • 2.Sh4#
      • 1...e5
        • 2.Sce3#
      • 1...e6
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(f);N_GUARD,XP(D)::S(C)
    • B(f);N_GUARD::S(C)
    • B(f);N_GUARD::S(C),XB(f)
    • S(a);N_GUARD::R(B),XS(a)
    • S(a);SBLOCK::S(C)
    • S(a);S_CUTB(f)::S(C)
    • P(g);P_PINQ(K),SBLOCK::S(E)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • S(a);XR(B)
    • Try
      • R(I);CHECK
      • Vars
        • R(h);XR(I)::S(C)
        • S(a);XR(I)::S(C)
      • Refutation
        • B(f);XR(I)
    • Try
      • R(I);CHECK,XB(f)
      • Vars
        • P(g);P_PINQ(K),SBLOCK,XR(I)::S(C)
      • Refutation
        • K(d);P-FLIGHT,XR(I)
    • Try
      • Q(K);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAB1(K),XS(i)
      • Refutation
        • P(g);CHECK,P_SPINP(g)
    • Try
      • Q(K);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAB1(K),XS(i)
      • Refutation
        • P(g);P_PINQ(K),P_SPINP(g)
  • Actual
    • R(B);
    • Threat
      • QAB(K)
    • Vars
      • S(i);N_GUARD,XQ(K)::B(F)
      • P(g);P_PINQ(K),XP(H)::S(E),XP(g)
      • S(a);N_GUARD::R(B),XS(a)
      • S(a);SBLOCK::S(C)
      • S(a);S_CUTB(f)::S(C)
      • P(g);P_PINQ(K),SBLOCK::S(E)
      • P(g);P_PINQ(K),SBLOCK::B(F)
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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).