MESON Chess Problem Database
Problem Display
PID: 19021 (3n1N1B/b6K/5R1N/2r1k3/1Q2r2n/4R3/B1b5/3q4 w - - 0 1)
Togstad, Jacob J
Pittsburgh Gazette-Times, 1911
#2
8 + 8
| 56 | The Problemist | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Qe2
- 2.Sd7#
- 1...Qf3
- 2.Sd7#
- 1...Qg4
- 2.Sxg4#
- 1...Qh5
- 2.Sd7#
- 1...Qa1
- 2.Sg4#
- 2.Sd7#
- 1...Qb1
- 2.Sg4#
- 2.Sd7#
- 1...Qc1
- 2.Sg4#
- 2.Sd7#
- 1...Qe1
- 2.Sg4#
- 2.Sd7#
- 1...Qf1
- 2.Sg4#
- 2.Sd7#
- 1...Qg1
- 2.Sd7#
- 1...Qh1
- 2.Sg4#
- 2.Sd7#
- 1...Qd2
- 2.Sg4#
- 1...Qd3
- 2.Sg4#
- 1...Qd4
- 2.Sg4#
- 1...Qd5
- 2.Sg4#
- 1...Qd6
- 2.Sg4#
- 2.Rf5#
- 1...Qd7+
- 2.Sxd7#
- 1...Rxe3+
- 2.Rg6#
- 1...Rc3
- 2.Rf1#
- 2.Rf2#
- 2.Rff3#
- 2.Rf5#
- 2.Rf7#
- 1...Rc4
- 2.Rf5#
- 1...Ra5
- 2.Rf1#
- 2.Rf2#
- 2.Rff3#
- 2.Rf5#
- 2.Rf7#
- 1...Rb5
- 2.Rf1#
- 2.Rf2#
- 2.Rff3#
- 2.Rf5#
- 2.Rf7#
- 1...Rd5
- 2.Rf1#
- 2.Rf2#
- 2.Rff3#
- 2.Rf5#
- 2.Rf7#
- 1...Rc6
- 2.Rf5#
- 1...Rc7+
- 2.Rf7#
- 1...Rc8
- 2.Rf1#
- 2.Rf2#
- 2.Rff3#
- 2.Rf5#
- 2.Rf7#
- 1...Bb3
- 2.Qxe4#
- 1...Bd3
- 2.Sd7#
- 1...Ba4
- 2.Rxe4#
- 2.Qxe4#
- 1...Sg2
- 2.Sg6#
- 1...Sf3
- 2.Sg4#
- 2.Sg6#
- 1...Sf5
- 2.Sg6#
- 1...Sg6
- 2.Sxg6#
- 1...Sc6
- 2.Sf7#
- 1...Se6
- 2.Sf7#
- 1...Sb7
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Qe2
- Tries
- 1.Qc3+?
- 1...Qd4
- 2.Sg4#
- 2.Sd7#
- 1...Rxc3!
- 1...Qd4
- 1.Qxc5+?
- 1...Qd5
- 2.Sg4#
- 2.Sd7#
- 2.Rf1#
- 2.Rf2#
- 2.Rff3#
- 2.Rf5#
- 2.Rf7#
- 2.Qxd5#
- 1...Bxc5!
- 1...Qd5
- 1.Qb2+?
- 1...Qd4
- 2.Sg4#
- 2.Sd7#
- 1...Rc3!
- 1...Qd4
- 1.Qd4+?
- 1...Qxd4
- 2.Sg4#
- 1...Kxd4!
- 1...Qxd4
- 1.Qc3+?
- Keys
- 1.Re2!
- threat
- 2.Sg4#
- 1...Qd7+
- 2.Sxd7#
- 1...Rxe2+
- 2.Rg6#
- 1...Re3+
- 2.Rg6#
- 1...Rc7+
- 2.Rf7#
- 1...Qxe2
- 2.Sd7#
- 1...Rc4
- 2.Rf5#
- 1...Bb3
- 2.Qxe4#
- 1...Sf5
- 2.Sg6#
- 1...Se6
- 2.Sf7#
- 1...Qg1
- 2.Sd7#
- threat
- 1.Re2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 14
- Sets
- Q(a);N_GUARD::S(G)
- Q(a);N_GUARD::S(E),XQ(a)
- Q(a);N_GUARD,P_PINS(E)::S(G)
- Q(a);N_GUARD::S(E)
- Q(a);CHECK,N_GUARD::S(G),XQ(a)
- R(c);CHECK,N_SPINR(c),XR(B)::B(H)+R(D)
- R(e);::B(H)+R(D),DCHECK
- R(e);CHECK::B(H)+R(D)
- B(b);N_GUARD::QAR1(C),XR(c)
- B(b);S_CUTQ(a)::S(G)
- S(d);N_GUARD::S(G)
- S(d);N_GUARD::S(G),XS(d)
- S(h);N_GUARD::S(E)
- S(h);N_GUARD::S(E),XS(h)
- Tries
- Try
- Q(C);CHECK
- Refutation
- R(e);XQ(C)
- Try
- Q(C);CHECK,XR(e)
- Refutation
- B(g);XQ(C)
- Try
- Q(C);CHECK
- Refutation
- R(e);N_SPINR(c),P_SPINR(e)
- Try
- Q(C);CHECK
- Vars
- Q(a);SBLOCK,XQ(C)::S(E)
- Refutation
- K(f);N_SPINR(c),S_FLIGHT,XQ(C)
- Try
- Actual
- R(B);
- Threat
- S(E)
- Vars
- Q(a);CHECK,N_GUARD::S(G),XQ(a)
- R(c);CHECK,N_SPINR(c),XR(B)::B(H)+R(D)
- R(c);CHECK::B(H)+R(D)
- R(e);CHECK::B(H)+R(D)
- Q(a);N_GUARD,N_SPINR(c),XR(B)::S(G)
- R(e);::B(H)+R(D),DCHECK
- B(b);N_GUARD::QAR1(C),XR(c)
- S(d);N_GUARD::S(G)
- S(h);N_GUARD::S(E)
- Q(a);N_GUARD::S(G)
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).