MESON Chess Problem Database
Problem Display
PID: 109281 (8/B2P4/1b1p3R/3k2pp/6N1/3K4/P2Q4/8 w - - 0 1)
Ryall, Isaac
Canadian Chess Association, 1873
#2
7 + 5
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bg1
- 2.Qg2#
- 1...Be3
- 2.Qg2#
- 1...Bd4
- 2.Qg2#
- 1...Ba5
- 2.Qg2#
- 1...Bc5
- 2.Qg2#
- 1...Bc7
- 2.Qg2#
- 1...Bd8
- 2.Qg2#
- 1...Bg1
- Tries
- 1.Qc1?
- threat
- 2.Qc4#
- 1...Bc5
- 2.Qh1#
- 1...hxg4!
- threat
- 1.Qb4?
- threat
- 2.Rxd6#
- 2.Qxd6#
- 2.Qc4#
- 1...hxg4
- 2.Qxd6#
- 1...Bc5
- 2.Qe4#
- 2.Qb7#
- 1...Bc7
- 2.Qc4#
- 2.Qe4#
- 2.Qb5#
- 2.Qb7#
- 1...Kc6!
- threat
- 1.Qc2?
- threat
- 2.Qc4#
- 1...Bc5
- 2.Qg2#
- 1...hxg4!
- threat
- 1.Qc1?
- Keys
- 1.d8S!
- threat
- 2.Qxg5#
- 1...Kc5
- 2.Qa5#
- 1...Bxd8
- 2.Qg2#
- 1...Be3
- 2.Qg2#
- 1...Bd4
- 2.Qg2#
- threat
- 1.d8S!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- B(d);::QAB(B)
- Tries
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- B(d);::QAB(B)
- Refutation
- P(c);XS(D)
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- P(c);XS(D)::QAR1(B),XP(e)
- Refutation
- K(a);P_SPINP(e),S_FLIGHT
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- B(d);::QAB(B)
- Refutation
- P(c);XS(D)
- Try
- Actual
- P(G);
- Threat
- QAR(B),XP(b)
- Vars
- K(a);P-FLIGHT,P_SPINB(d)::QAR2(B)
- B(d);XS(G)::QAB(B)
- B(d);::QAB(B)
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).