MESON Chess Problem Database

Problem Display
PID: 219236 (3r4/2rn4/2P3NQ/5k1N/R4b1q/5n1P/K1R1P3/1B5b w - - 0 1)

Hannelius, Jan Ingvar

Suomen Shakki, 1946

3r4/2rn4/2P3NQ/5k1N/R4b1q/5n1P/K1R1P3/1B5b

#2

10 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc6
      • 2.Rxc6#
    • 1...Sfe5
      • 2.Sxh4#
  • Tries
    • 1.Sgxf4?
      • threat
        • 2.Rc5#
      • 1...Ke5
        • 2.Qe6#
      • 1...Sfe5
        • 2.Sg7#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Sde5
        • 2.e4#
      • 1...Qxh3!
    • 1.Sxh4+?
      • 1...Sxh4
        • 2.Rc5#
      • 1...Ke5!
    • 1.Se7+?
      • 1...Qxe7
        • 2.Rc5#
      • 1...Ke5!
  • Keys
    • 1.Sf8!
      • threat
        • 2.Rc5#
      • 1...Ke5
        • 2.Qe6#
      • 1...Qxh3
        • 2.Qxf4#
      • 1...Be5
        • 2.Qg6#
      • 1...Sfe5
        • 2.Sg7#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Sde5
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(f);OGATE,XP(H)::B(A)+R(C),XR(f)
    • S(b);N_GUARD,SBLOCK::S(I),XQ(d)
  • Tries
    • Try
      • S(I);XB(c)
      • Threat
        • B(A)+R(C),DCHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(J)
        • S(b);SBLOCK::S(G)
        • S(g);::B(A)+R(C),DCHECK,XS(g)
        • S(g);SBLOCK::P(D)
      • Refutation
        • Q(d);XP(E)
    • Try
      • S(I);CHECK,XQ(d)
      • Vars
        • S(b);XS(I)::B(A)+R(C),DCHECK
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • S(I);CHECK
      • Vars
        • Q(d);XS(I)::B(A)+R(C),DCHECK
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • S(I);
    • Threat
      • B(A)+R(C),DCHECK
    • Vars
      • K(e);P-FLIGHT::QAR1(J)
      • Q(d);N_GUARD,XP(E)::QAR1(J),XB(c)
      • B(c);SBLOCK::QAB1(J)
      • S(b);SBLOCK::S(G)
      • S(g);::B(A)+R(C),DCHECK,XS(g)
      • S(g);SBLOCK::P(D)
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).