MESON Chess Problem Database
Problem Display
PID: 203617 (3QK3/4Pp2/5R2/1p6/1n6/1nP1k3/RN2p3/1B6 w - - 0 1)
Keysor, William Ellis
Brisbane Courier, 1924
#2
8 + 6
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Sa1
- 2.Qd4#
- 1...Sc1
- 2.Qd4#
- 1...Sd2
- 2.Qb6#
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sa5
- 2.Qd4#
- 1...Sc5
- 2.Qd4#
- 1...Sxa2
- 2.Qd3#
- 1...Sc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...e1S
- 2.Sd1#
- 1...e1B
- 2.Sd1#
- 1...Sa1
- Tries
- 1.Kxf7?
- threat
- 2.e8Q#
- 2.e8R#
- 1...Sxa2
- 2.Qd3#
- 2.e8Q#
- 2.e8R#
- 1...Sd4
- 2.Qxd4#
- 1...Sc2
- 2.Qd3#
- 2.e8Q#
- 2.e8R#
- 1...Sd3
- 2.Qxd3#
- 1...e1Q
- 2.e8Q#
- 2.e8R#
- 1...e1S
- 2.Sd1#
- 2.e8Q#
- 2.e8R#
- 1...e1B
- 2.Sd1#
- 2.e8Q#
- 2.e8R#
- 1...e1R
- 2.e8Q#
- 2.e8R#
- 1...Sa1
- 2.Qd4#
- 2.e8Q#
- 2.e8R#
- 1...Sc1
- 2.Qd4#
- 2.e8Q#
- 2.e8R#
- 1...Sd2
- 2.Qb6#
- 2.Qd4#
- 1...Sa5
- 2.Qd4#
- 2.e8Q#
- 2.e8R#
- 1...Sc5
- 2.Qd4#
- 1...Sa6
- 2.Qd3#
- 2.e8Q#
- 2.e8R#
- 1...Sc6
- 2.Qd3#
- 1...Sd5!
- threat
- 1.Kf8?
- threat
- 2.e8Q#
- 2.e8R#
- 1...Sxa2
- 2.Qd3#
- 2.e8Q#
- 2.e8R#
- 1...Sd4
- 2.Qxd4#
- 1...Sc2
- 2.Qd3#
- 2.e8Q#
- 2.e8R#
- 1...Sd3
- 2.Qxd3#
- 1...e1Q
- 2.e8Q#
- 2.e8R#
- 1...e1S
- 2.Sd1#
- 2.e8Q#
- 2.e8R#
- 1...e1B
- 2.Sd1#
- 2.e8Q#
- 2.e8R#
- 1...e1R
- 2.e8Q#
- 2.e8R#
- 1...Sa1
- 2.Qd4#
- 2.e8Q#
- 2.e8R#
- 1...Sc1
- 2.Qd4#
- 2.e8Q#
- 2.e8R#
- 1...Sd2
- 2.Qb6#
- 2.Qd4#
- 1...Sa5
- 2.Qd4#
- 2.e8Q#
- 2.e8R#
- 1...Sc5
- 2.Qd4#
- 1...Sa6
- 2.Qd3#
- 2.e8Q#
- 2.e8R#
- 1...Sc6
- 2.Qd3#
- 1...Sd5!
- threat
- 1.Kxf7?
- Keys
- 1.Qd1!
- 1...Sxa2
- 2.Qd3#
- 1...exd1Q
- 2.Sxd1#
- 1...exd1S
- 2.Sxd1#
- 1...exd1B
- 2.Sxd1#
- 1...exd1R
- 2.Sxd1#
- 1...Sc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...e1Q
- 2.Rf3#
- 2.Qxe1#
- 1...e1S
- 2.Qxe1#
- 1...e1B
- 2.Rf3#
- 2.Qxe1#
- 1...e1R
- 2.Rf3#
- 2.Qxe1#
- 1...Sa1
- 2.Qc1#
- 2.Qd4#
- 1...Sc1
- 2.Qxc1#
- 2.Qd4#
- 1...Sd2
- 2.Qg1#
- 1...Sd4
- 2.Qc1#
- 2.Qxd4#
- 1...Sa5
- 2.Qc1#
- 2.Qd4#
- 1...Sc5
- 2.Qc1#
- 2.Qd4#
- 1...Sd5
- 2.Qd3#
- 1...Sa6
- 2.Qd3#
- 1...Sc6
- 2.Qd3#
- 1...Sxa2
- 1.Qd1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 6
- Sets
- S(b);N_GUARD::QAB1(G)
- S(b);N_GUARD::QAB1(G),XS(b)
- S(d);N_GUARD,XR(B)::QAR1(G)
- S(d);N_GUARD::QAR1(G)
- S(d);N_GUARD::QAR1(G),XS(d)
- P(a);N_GUARD::S(C)
- Tries
- Try
- K(H);S_FLIGHT,XP(f)
- Threat
- P=Q
- Vars
- S(b);N_GUARD::QAB1(G),XS(b)
- S(d);N_GUARD::QAR1(G),XS(d)
- P(a);::P=Q
- S(b);N_GUARD::QAB1(G)
- S(d);N_GUARD::QAR1(G)
- Refutation
- S(d);
- Try
- K(H);P-FLIGHT
- Threat
- P=Q
- Vars
- S(b);N_GUARD::QAB1(G),XS(b)
- S(d);N_GUARD::QAR1(G),XS(d)
- P(a);::P=Q
- S(b);N_GUARD::QAB1(G)
- S(d);N_GUARD::QAR1(G)
- Refutation
- S(d);
- Try
- Actual
- Q(G);
- Vars
- S(d);N_GUARD,XR(B)::QAR1(G)
- P(a);XQ(G)::S(C),XQ(a)
- P(a);XQ(G)::S(C),XS(a)
- P(a);XQ(G)::S(C),XB(a)
- P(a);XQ(G)::S(C),XR(a)
- S(d);N_GUARD::QAR1(G)
- S(d);N_GUARD::QAR1(G),XS(d)
- P(a);OGATEB::QAR2(G),XS(a)
- S(b);SBLOCK::QAB(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).