MESON Chess Problem Database
Problem Display
PID: 90148 (8/1Q3NK1/8/3nPP1p/p5kr/r3R2p/b1P5/2b2R1N w - - 0 1)
Vaughan, Colin V
Die Schwalbe, 1949
#2
9 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bb3
- 2.Rg3#
- 1...Sc3
- 2.Rg3#
- 2.Qf3#
- 1...Sxe3
- 2.Qf3#
- 2.Qe4#
- 1...Sb4
- 2.Qf3#
- 2.Qe4#
- 1...Sb6
- 2.Qf3#
- 2.Qe4#
- 1...Sf6
- 2.Qf3#
- 1...Sc7
- 2.Qf3#
- 2.Qe4#
- 1...Se7
- 2.Qf3#
- 2.Qe4#
- 1...Bb3
- Tries
- 1.Qa6?
- threat
- 2.Qe2#
- 2.Qg6#
- 1...Rxe3
- 2.Qg6#
- 1...Bxe3
- 2.Qe2#
- 1...Rd3
- 2.Qg6#
- 1...Bc4
- 2.Qg6#
- 1...Sc3
- 2.Rg3#
- 2.Qg6#
- 1...Sb6
- 2.Qe2#
- 1...Sf6
- 2.Qe2#
- 1...Se7
- 2.Qe2#
- 1...Sf4!
- threat
- 1.f6?
- threat
- 2.Qc8#
- 2.Qd7#
- 1...Sxe3
- 2.Qf3#
- 2.Qe4#
- 1...Sxf6
- 2.Qf3#
- 1...Rc3
- 2.Qd7#
- 1...Sc3
- 2.Rg3#
- 2.Qf3#
- 1...Sb4
- 2.Qf3#
- 2.Qe4#
- 1...Sb6
- 2.Qf3#
- 2.Qe4#
- 1...Sc7
- 2.Qf3#
- 2.Qe4#
- 1...Se7
- 2.Qf3#
- 2.Qe4#
- 1...Sf4!
- threat
- 1.Qa6?
- Keys
- 1.Qd7!
- threat
- 2.f6#
- 1...Sxe3
- 2.Qd4#
- 1...Sc3
- 2.Rg3#
- 1...Sb4
- 2.Qd1#
- 2.Qd4#
- 1...Sf4
- 2.Sf2#
- 1...Sb6
- 2.Qd1#
- 2.Qd4#
- 1...Sf6
- 2.Qd1#
- 1...Sc7
- 2.Qd1#
- 2.Qd4#
- 1...Se7
- 2.Qd1#
- 2.Qd4#
- threat
- 1.Qd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- B(b);S_CUTR(c)::R1(D)
- S(h);OGATE::QAB1(G)
- Tries
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- R(c);XR(D)::QAR2(G)
- B(a);XR(D)::QAB(G)
- R(c);::QAR2(G)
- B(b);::QAR2(G)
- S(h);::QAB(G)
- Refutation
- S(h);
- Try
- P(F);
- Threat
- DUALS(2)
- Vars
- S(h);OGATE,XP(F)::QAB1(G)
- R(c);::QAB(G)
- Refutation
- S(h);
- Try
- Actual
- Q(G);
- Threat
- QAB(G)+P(F)
- Vars
- S(h);OGATE,XR(D)::QAR(G)
- S(h);S_CUTR(c)::R1(D)
- S(h);SBLOCK::S(B)
- S(h);OGATE::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).