MESON Chess Problem Database
Problem Display
PID: 109691 (2B5/3R4/1rNPn1kp/Q6N/6pK/b7/8/1b6 w - - 0 1)
White, Alain Campbell
Checkmate, 1903
#2
7 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bf5
- 2.Se5#
- 1...Sd4
- 2.Rg7#
- 1...Sf4
- 2.Rg7#
- 1...Sc5
- 2.Rg7#
- 1...Sg5
- 2.Rg7#
- 1...Sc7
- 2.Rg7#
- 1...Sg7
- 2.Rxg7#
- 1...Sd8
- 2.Rg7#
- 1...Sf8
- 2.Rg7#
- 1...Bf5
- Tries
- 1.Sf4+?
- 1...Kf6
- 2.Qe5#
- 1...Sxf4!
- 1...Kf6
- 1.Qd5?
- threat
- 2.Qxe6#
- 1...Sg7
- 2.Rxg7#
- 1...Ba2
- 2.Qe4#
- 2.Qd3#
- 1...Bf5
- 2.Se5#
- 1...Sd4
- 2.Rg7#
- 2.Qf7#
- 1...Sf4
- 2.Rg7#
- 2.Qf7#
- 1...Sc5
- 2.Rg7#
- 2.Qf7#
- 1...Sg5
- 2.Rg7#
- 1...Sc7
- 2.Rg7#
- 2.Qf7#
- 1...Sd8
- 2.Rg7#
- 1...Sf8
- 2.Rg7#
- 2.Qf7#
- 1...Bb2!
- threat
- 1.Qe5?
- threat
- 2.Qf6#
- 2.Qxe6#
- 1...Sg7
- 2.Rxg7#
- 1...Ba2
- 2.Qf6#
- 2.Qe4#
- 1...Bf5
- 2.Qf6#
- 1...Sd4
- 2.Sf4#
- 2.Rg7#
- 2.Qf6#
- 1...Sf4
- 2.Sxf4#
- 2.Rg7#
- 2.Qf6#
- 1...Sc5
- 2.Sf4#
- 2.Rg7#
- 2.Qf6#
- 1...Sg5
- 2.Sf4#
- 2.Rg7#
- 2.Qf6#
- 1...Sc7
- 2.Sf4#
- 2.Rg7#
- 2.Qf6#
- 1...Sd8
- 2.Sf4#
- 2.Rg7#
- 2.Qf6#
- 1...Sf8
- 2.Sf4#
- 2.Rg7#
- 2.Qf6#
- 1...Bb2!
- threat
- 1.Qf5+?
- 1...Bxf5
- 2.Se5#
- 1...Kxf5!
- 1...Bxf5
- 1.Qg5+?
- 1...Sxg5
- 2.Rg7#
- 1...hxg5+!
- 1...Sxg5
- 1.Sf4+?
- Keys
- 1.Qe1!
- threat
- 2.Qxe6#
- 1...Kf5
- 2.Se7#
- 1...Sg7
- 2.Rxg7#
- 1...Ba2
- 2.Qe4#
- 1...Be4
- 2.Qxe4#
- 1...Bf5
- 2.Se5#
- 1...Bb2
- 2.Qxb1#
- 1...Sd4
- 2.Rg7#
- 1...Sf4
- 2.Rg7#
- 1...Sc5
- 2.Rg7#
- 1...Sg5
- 2.Rg7#
- 1...Sc7
- 2.Rg7#
- 1...Sd8
- 2.Rg7#
- 1...Sf8
- 2.Rg7#
- threat
- 1.Qe1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- B(a);SBLOCK::S(D)
- S(e);N_GUARD::R1(F)
- S(e);N_GUARD::R1(F),XS(e)
- Tries
- Try
- S(C);CHECK
- Vars
- K(f);P-FLIGHT::QAB1(B)
- Refutation
- S(e);XS(C)
- Try
- Q(B);
- Threat
- QAR2(B),XS(e)
- Vars
- S(e);N_GUARD::R1(F),XS(e)
- B(a);SBLOCK::S(D)
- S(e);N_GUARD::R1(F)
- Refutation
- B(b);
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- S(e);N_GUARD::R1(F),XS(e)
- B(a);::QAR1(B)
- Refutation
- B(b);
- Try
- Q(B);CHECK
- Vars
- B(a);SBLOCK,XQ(B)::S(D)
- Refutation
- K(f);S_FLIGHT,XQ(B)
- Try
- Q(B);CHECK
- Vars
- S(e);XQ(B)::R1(F)
- Refutation
- P(g);CHECK,XQ(B)
- Try
- Actual
- Q(B);
- Threat
- QAR2(B),XS(e)
- Vars
- K(f);S_FLIGHT::S(D)
- S(e);N_GUARD::R1(F),XS(e)
- B(a);N_GUARD::QAB(B)
- B(a);N_GUARD::QAB(B),XB(a)
- B(a);SBLOCK::S(D)
- B(b);S_CUTR(d)::QAB(B),XB(a)
- S(e);N_GUARD::R1(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).