MESON Chess Problem Database
Problem Display
PID: 287 (2n5/p4pKQ/B4Rn1/2pkB3/5Pp1/1p1N2N1/1P5b/8 w - - 0 1)
Schuld, Henk L
The Observer, 1920
(First published on Sun Jun 20 1920)
#2
9 + 9
| 887 | Mate in Two Moves | 1931 |
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Bg1
- 2.Qh1#
- 1...Bxg3
- 2.Qh1#
- 1...Sxf4
- 2.Qe4#
- 1...Sh4
- 2.Qe4#
- 1...Sxe5
- 2.Qe4#
- 1...Sge7
- 2.Qe4#
- 1...Sf8
- 2.Qe4#
- 1...Sh8
- 2.Qe4#
- 1...Sb6
- 2.Rd6#
- 1...Sd6
- 2.Rxd6#
- 1...Sce7
- 2.Rd6#
- 1...c4
- 2.Bb7#
- 1...Bg1
- Tries
- 1.Kh6?
- threat
- 2.Qxf7#
- 1...Sxf4
- 2.Qe4#
- 1...Sxe5
- 2.Qe4#
- 1...Sd6
- 2.Rxd6#
- 1...Sf8
- 2.Qe4#
- 1...Sh8
- 2.Qe4#
- 1...Bxg3!
- threat
- 1.Sc1?
- 1...Bxg3
- 2.Qh1#
- 1...Sxf4
- 2.Qe4#
- 1...Sxe5
- 2.Qe4#
- 1...Sd6
- 2.Rxd6#
- 1...Bg1
- 2.Qh1#
- 1...Sh4
- 2.Qd3#
- 2.Qe4#
- 1...Sge7
- 2.Qd3#
- 2.Qe4#
- 1...Sf8
- 2.Qd3#
- 2.Qe4#
- 1...Sh8
- 2.Qd3#
- 2.Qe4#
- 1...Sb6
- 2.Rd6#
- 1...Sce7
- 2.Rd6#
- 1...c4!
- 1...Bxg3
- 1.Se1?
- 1...Bxg3
- 2.Qh1#
- 1...Sxf4
- 2.Qe4#
- 1...Sxe5
- 2.Qe4#
- 1...Sd6
- 2.Rxd6#
- 1...Bg1
- 2.Qh1#
- 1...Sh4
- 2.Qd3#
- 2.Qe4#
- 1...Sge7
- 2.Qd3#
- 2.Qe4#
- 1...Sf8
- 2.Qd3#
- 2.Qe4#
- 1...Sh8
- 2.Qd3#
- 2.Qe4#
- 1...Sb6
- 2.Rd6#
- 1...Sce7
- 2.Rd6#
- 1...c4!
- 1...Bxg3
- 1.Sf2?
- 1...Bxg3
- 2.Qh1#
- 1...Sxf4
- 2.Qe4#
- 1...Sxe5
- 2.Qe4#
- 1...Sd6
- 2.Rxd6#
- 1...Bg1
- 2.Qh1#
- 1...Sh4
- 2.Qd3#
- 2.Qe4#
- 1...Sge7
- 2.Qd3#
- 2.Qe4#
- 1...Sf8
- 2.Qd3#
- 2.Qe4#
- 1...Sh8
- 2.Qd3#
- 2.Qe4#
- 1...Sb6
- 2.Rd6#
- 1...Sce7
- 2.Rd6#
- 1...c4!
- 1...Bxg3
- 1.Kh6?
- Keys
- 1.Qh5!
- 1...Bxg3
- 2.Qh1#
- 1...Sxf4
- 2.Sxf4#
- 1...Sxe5
- 2.Qxe5#
- 1...Sd6
- 2.Rxd6#
- 1...Bg1
- 2.Qh1#
- 1...Sh4
- 2.Qxf7#
- 1...Sge7
- 2.Qxf7#
- 1...Sf8
- 2.Bc3#
- 1...Sh8
- 2.Bc3#
- 1...Sb6
- 2.Rd6#
- 1...Sce7
- 2.Rd6#
- 1...c4
- 2.Bb7#
- 1...Bxg3
- 1.Qh5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(a);OGATE::QAB(I)
- B(a);OGATE,XS(C)::QAB(I)
- S(f);OGATE,XP(D)::QAB1(I)
- S(f);OGATE::QAB1(I)
- S(f);OGATE,XB(E)::QAB1(I)
- S(i);N_GUARD::R1(G)
- S(i);N_GUARD::R1(G),XS(i)
- P(d);SBLOCK::B(F)
- Tries
- Try
- K(H);S_FLIGHT
- Threat
- QAB(I),XP(h)
- Vars
- S(f);OGATE,XP(D)::QAB1(I)
- S(f);OGATE,XB(E)::QAB1(I)
- S(i);N_GUARD::R1(G),XS(i)
- S(f);OGATE::QAB1(I)
- Refutation
- B(a);XS(C)
- Try
- S(B);
- Vars
- B(a);OGATE,XS(C)::QAB(I)
- S(f);OGATE,XP(D)::QAB1(I)
- S(f);OGATE,XB(E)::QAB1(I)
- S(i);N_GUARD::R1(G),XS(i)
- B(a);OGATE::QAB(I)
- S(i);N_GUARD::R1(G)
- Refutation
- P(d);
- Try
- S(B);
- Vars
- B(a);OGATE,XS(C)::QAB(I)
- S(f);OGATE,XP(D)::QAB1(I)
- S(f);OGATE,XB(E)::QAB1(I)
- S(i);N_GUARD::R1(G),XS(i)
- B(a);OGATE::QAB(I)
- S(i);N_GUARD::R1(G)
- Refutation
- P(d);
- Try
- S(B);
- Vars
- B(a);OGATE,XS(C)::QAB(I)
- S(f);OGATE,XP(D)::QAB1(I)
- S(f);OGATE,XB(E)::QAB1(I)
- S(i);N_GUARD::R1(G),XS(i)
- B(a);OGATE::QAB(I)
- S(i);N_GUARD::R1(G)
- Refutation
- P(d);
- Try
- Actual
- Q(I);
- Vars
- B(a);OGATE,XS(C)::QAB(I)
- S(f);XP(D)::S(B),XS(f)
- S(f);OGATE,P_SPINS(f),XB(E)::QAR1(I),XS(f)
- S(i);N_GUARD::R1(G),XS(i)
- B(a);OGATE::QAB(I)
- S(f);OGATE::QAB(I),XP(h)
- S(f);N_GUARD::QAR(I)+B(E)
- S(i);N_GUARD::R1(G)
- P(d);SBLOCK::B(F)
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).