MESON Chess Problem Database

Problem Display
PID: 48892 (8/K1QB4/8/2pkp3/Rn3qN1/1PbPRP2/2P1n3/3N4 w - - 0 1)

van Pol, ?

Het Schaakleven, 1932

8/K1QB4/8/2pkp3/Rn3qN1/1PbPRP2/2P1n3/3N4

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd6#
    • 1...Qd4
      • 2.Sf6#
    • 1...Bd4
      • 2.c4#
    • 1...Sd4
      • 2.Sxc3#
    • 1...Sa2
      • 2.Qc6#
    • 1...Sxc2
      • 2.Qc6#
    • 1...Sxd3
      • 2.Qc6#
    • 1...Sa6
      • 2.Qc6#
    • 1...Sc6+
      • 2.Qxc6#
  • Tries
    • 1.Sf6+?
      • 1...Kd4
        • 2.Qd6#
      • 1...Qxf6!
    • 1.Bc6+?
      • 1...Kd4
        • 2.Qd6#
        • 2.Qd8#
        • 2.Qd7#
      • 1...Ke6
        • 2.Qd7#
      • 1...Sxc6+!
    • 1.Be6+?
      • 1...Kd4
        • 2.Qd6#
        • 2.Qd8#
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Qc6+?
      • 1...Kd4
        • 2.Qd6#
      • 1...Sxc6+!
  • Keys
    • 1.d4!
      • threat
        • 2.Qxc5#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Kxd4
        • 2.Rd3#
        • 2.Qd6#
      • 1...Qxd4
        • 2.Sf6#
      • 1...Bxd4
        • 2.c4#
      • 1...Sxd4
        • 2.Sxc3#
      • 1...cxd4
        • 2.Ra5#
      • 1...exd4
        • 2.Be6#
      • 1...Qf8
        • 2.Qxe5#
      • 1...Sd3
        • 2.Qc6#
      • 1...Sa6
        • 2.Qc6#
      • 1...c4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • K(f);P-FLIGHT,P_SPINS(c)::QAR2(J)
    • Q(d);N_GUARD,SBLOCK::S(H)
    • B(b);OGATE,SBLOCK::P(B)
    • S(a);N_GUARD,SBLOCK::S(A),XB(b)
    • S(c);N_GUARD::QAB1(J)
    • S(c);N_GUARD,XP(B)::QAB1(J)
    • S(c);N_GUARD,XP(D)::QAB1(J)
    • S(c);CHECK,N_GUARD::QAB1(J),XS(c)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINS(c)::QAR2(J)
      • Refutation
        • Q(d);XS(H)
    • Try
      • B(K);CHECK
      • Vars
        • K(f);P_SPINP(g),S_FLIGHT::QAB1(J)
      • Refutation
        • S(c);CHECK,XB(K)
    • Try
      • B(K);CHECK
      • Refutation
        • K(f);P_SPINP(g),S_FLIGHT,XB(K)
    • Try
      • Q(J);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINS(c)::QAR2(J)
      • Refutation
        • S(c);CHECK,XQ(J)
  • Actual
    • P(D);
    • Threat
      • QAR1(J),XP(e)
    • Vars
      • S(c);CHECK,N_GUARD::QAB1(J),XS(c)
      • Q(d);N_GUARD,SBLOCK,XP(D)::S(H)
      • B(b);OGATE,SBLOCK,XP(D)::P(B)
      • S(a);N_GUARD,SBLOCK,XP(D)::S(A),XB(b)
      • P(e);OGATEB,SBLOCK,XP(D)::R(G)
      • P(g);SBLOCK,XP(D)::B(K)
      • Q(d);N_GUARD::QAR1(J),XP(g)
      • S(c);N_GUARD::QAB1(J)
      • P(e);::QAR1(J)
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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).