MESON Chess Problem Database

Problem Display
PID: 225887 (6b1/r1QP3p/p6P/4N2B/4k2K/2n1PRB1/1N1p2p1/3qR3 w - - 0 1)

Jancek, Jan

1st HM., Praca, 1952

6b1/r1QP3p/p6P/4N2B/4k2K/2n1PRB1/1N1p2p1/3qR3

#2

11 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qc6#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Bd5
      • 2.Rf4#
    • 1...Sd5
      • 2.Qc4#
  • Tries
    • 1.Sed3?
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qc4#
      • 1...Rxc7!
    • 1.Sg6?
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qc4#
      • 1...Rxc7!
    • 1.Sf7?
      • threat
        • 2.Qe5#
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Qxf3
        • 2.Qe5#
      • 1...Bxf7
        • 2.Qe5#
      • 1...dxe1Q
        • 2.Qe5#
      • 1...dxe1S
        • 2.Qe5#
      • 1...dxe1B
        • 2.Qe5#
      • 1...dxe1R
        • 2.Qe5#
      • 1...Qe2
        • 2.Qe5#
      • 1...Qb3
        • 2.Qe5#
      • 1...Qa4
        • 2.Qe5#
      • 1...Se2
        • 2.Qe5#
        • 2.Qc6#
      • 1...Sb5
        • 2.Qe5#
        • 2.Qc6#
      • 1...Rxc7!
    • 1.Bg6+?
      • 1...Kd5
        • 2.Qc6#
      • 1...hxg6!
    • 1.Qc6+?
      • 1...Sd5
        • 2.Qc4#
      • 1...Bd5!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf6#
      • 1...Kxf3
        • 2.Sf2#
        • 2.Sf6#
        • 2.Qf4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Qxf3
        • 2.Qe5#
      • 1...Sd5
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(e);S_FLIGHT::QAB1(J)
    • B(i);N_GUARD::QAR2(J),XB(i)
    • B(i);SBLOCK::R1(D)
    • S(d);S_CUTB(i)::QAR2(J)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAR1(J)
      • Vars
        • K(e);S_FLIGHT::QAB1(J)
      • Refutation
        • R(g);XQ(J)
    • Try
      • S(G);
      • Threat
        • QAR1(J)
      • Vars
        • K(e);S_FLIGHT::QAB1(J)
      • Refutation
        • R(g);XQ(J)
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);S_FLIGHT::QAB1(J)
        • Q(a);XR(D)::QAR1(J)
        • B(i);XS(G)::QAR1(J)
        • P(b);P_PINB(E),XR(A)::QAR1(J)
        • P(b);XR(A)::QAR1(J)
        • Q(a);::QAR1(J)
      • Refutation
        • R(g);XQ(J)
    • Try
      • B(H);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(J)
      • Refutation
        • P(h);XB(H)
    • Try
      • Q(J);CHECK
      • Vars
        • S(d);P_SPINS(d),S_CUTB(i)::QAR2(J)
      • Refutation
        • B(i);P_SPINB(i)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(e);S_FLIGHT::QAB1(J)
      • Q(a);SBLOCK,XR(D)::QAR1(J)
      • S(d);SBLOCK::S(G)
HTML5 logo

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).