MESON Chess Problem Database

Problem Display
PID: 243311 (3r2q1/6rb/7Q/1pBkp1N1/1n1nN3/b4P2/1P6/1KRR1B2 w - - 0 1)

Andersson, Gunnar

Skakbladet, 1940

3r2q1/6rb/7Q/1pBkp1N1/1n1nN3/b4P2/1P6/1KRR1B2

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Qxe6#
    • 1...Qf8
      • 2.Qe6#
    • 1...Qh8
      • 2.Qe6#
    • 1...Rf7
      • 2.Qe6#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Ra8
      • 2.Qd6#
    • 1...Rb8
      • 2.Qd6#
    • 1...Rc8
      • 2.Qd6#
    • 1...Re8
      • 2.Qd6#
    • 1...Rf8
      • 2.Qd6#
    • 1...Bxe4+
      • 2.fxe4#
  • Tries
    • 1.Bxb4?
      • threat
        • 2.Rc5#
        • 2.Qc6#
      • 1...Bxe4+
        • 2.fxe4#
      • 1...Bxb4
        • 2.Qc6#
      • 1...Qe6
        • 2.Rc5#
        • 2.Qxe6#
      • 1...Qe8
        • 2.Rc5#
      • 1...Qf8
        • 2.Qc6#
        • 2.Qe6#
      • 1...Rg6
        • 2.Rc5#
      • 1...Rd6
        • 2.Rc5#
        • 2.Qxd6#
      • 1...Rc8
        • 2.Qd6#
      • 1...Bg6
        • 2.Rc5#
      • 1...Rc7!
    • 1.Bf8?
      • threat
        • 2.Rc5#
      • 1...Bxe4+
        • 2.fxe4#
      • 1...Qxf8
        • 2.Qe6#
      • 1...Rc8
        • 2.Qd6#
      • 1...Sa2
        • 2.Qc6#
      • 1...Sc2
        • 2.Sc3#
      • 1...Sd3
        • 2.Sf6#
      • 1...Sa6
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Rc7!
  • Keys
    • 1.Be7!
      • threat
        • 2.Rc5#
      • 1...Bxe4+
        • 2.fxe4#
      • 1...Rc8
        • 2.Qd6#
      • 1...Sa2
        • 2.Qc6#
      • 1...Sc2
        • 2.Sc3#
      • 1...Sd3
        • 2.Sf6#
      • 1...Sa6
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • Q(j);N_GUARD::QAB1(J),XQ(j)
    • Q(j);N_GUARD::QAB1(J)
    • R(g);S_CUTQ(j)::QAB1(J)
    • R(i);N_GUARD::QAR1(J),XR(i)
    • R(i);N_GUARD::QAR1(J)
    • B(h);CHECK,OGATE,XS(G)::P(F),XB(h)
  • Tries
    • Try
      • B(H);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(h);CHECK,OGATE,XS(G)::P(F),XB(h)
        • B(a);XB(H)::QAB1(J)
        • Q(j);::R1(B)
        • R(g);N_PINS(G)::R1(B)
        • R(i);N_GUARD::QAR1(J)
        • B(h);::R1(B)
      • Refutation
        • R(g);
    • Try
      • B(H);
      • Threat
        • R1(B)
      • Vars
        • B(h);CHECK,OGATE,XS(G)::P(F),XB(h)
        • Q(j);N_GUARD,XB(H)::QAB1(J)
        • R(i);N_GUARD::QAR1(J)
        • S(b);N_GUARD::QAB1(J)
        • S(b);N_PINS(G)::S(G)
        • S(b);N_PINS(G),N_SPINS(c)::S(G)
        • S(b);N_GUARD::QAB1(J),XS(b)
      • Refutation
        • R(g);
  • Actual
    • B(H);
    • Threat
      • R1(B)
    • Vars
      • B(h);CHECK,OGATE,XS(G)::P(F),XB(h)
      • R(i);N_GUARD::QAR1(J)
      • S(b);N_GUARD::QAB1(J)
      • S(b);N_PINS(G)::S(G)
      • S(b);N_PINS(G),N_SPINS(c)::S(G)
      • S(b);N_GUARD::QAB1(J),XS(b)
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).