MESON Chess Problem Database
Problem Display
PID: 149859 (4R2r/2rpN3/2bK2p1/5P2/1nQ1B3/2P1k1BR/2P3n1/1N4b1 w - - 0 1)
Khachaturov, Sergei
3rd Prize, Die Schwalbe, 2012
#2
11 + 9
| 23 | Die Schwalbe | 2014 |
| 56 | The Problemist | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Sa2
- 2.Qd3#
- 1...Sxc2
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Sd5
- 2.Qd3#
- 1...Sa6
- 2.Qd3#
- 1...gxf5
- 2.Sxf5#
- 1...Sa2
- Tries
- 1.Sd5+?
- 1...Sxd5
- 2.Qd3#
- 1...Bxd5!
- 1...Sxd5
- 1.Bd5?
- threat
- 2.Sg8#
- 2.Bh4#
- 2.Qe4#
- 1...Rxh3
- 2.Sxc6#
- 2.Sxg6#
- 2.Sc8#
- 2.Sg8#
- 2.Qe4#
- 1...Rxe8
- 2.Be1#
- 2.Bh4#
- 2.Qe4#
- 1...Sxd5
- 2.Bh4#
- 2.Qd3#
- 1...gxf5
- 2.Sxf5#
- 2.Sg8#
- 2.Bh4#
- 1...Sd3
- 2.Qxd3#
- 2.Qe4#
- 1...Rc8
- 2.Bh4#
- 2.Qe4#
- 1...Rh4
- 2.Bxh4#
- 1...Rh7
- 2.Bh4#
- 2.Qe4#
- 1...Rf8
- 2.Be1#
- 2.Bh4#
- 2.Qe4#
- 1...Rg8
- 2.Sxg8#
- 2.Be1#
- 2.Bh4#
- 2.Qe4#
- 1...Bf2
- 2.Sg8#
- 2.Bf4#
- 2.Qe4#
- 1...Bh2
- 2.Sg8#
- 2.Qe4#
- 1...Se1
- 2.Sg8#
- 2.Qe4#
- 1...Sf4
- 2.Qe4#
- 1...Sh4
- 2.Sg8#
- 2.Bxh4#
- 2.Qe4#
- 1...Bxd5!
- threat
- 1.Bxc6?
- threat
- 2.Sg8#
- 2.Bh4#
- 2.Qe4#
- 1...Rxh3
- 2.Sxg6#
- 2.Sc8#
- 2.Sg8#
- 2.Qe4#
- 1...Rxe8
- 2.Be1#
- 2.Bh4#
- 2.Qe4#
- 1...Sxc6
- 2.Bh4#
- 2.Qd3#
- 1...gxf5
- 2.Sxf5#
- 2.Sg8#
- 2.Bh4#
- 1...dxc6
- 2.Bh4#
- 1...Sd3
- 2.Qxd3#
- 2.Qe4#
- 1...Sd5
- 2.Bh4#
- 2.Qd3#
- 1...Rc8
- 2.Bh4#
- 2.Qe4#
- 1...Rh4
- 2.Bxh4#
- 1...Rh7
- 2.Bh4#
- 2.Qe4#
- 1...Rf8
- 2.Be1#
- 2.Bh4#
- 2.Qe4#
- 1...Rg8
- 2.Sxg8#
- 2.Be1#
- 2.Bh4#
- 2.Qe4#
- 1...Bf2
- 2.Sg8#
- 2.Bf4#
- 2.Qe4#
- 1...Bh2
- 2.Sg8#
- 2.Qe4#
- 1...Se1
- 2.Sg8#
- 2.Qe4#
- 1...Sf4
- 2.Qe4#
- 1...Sh4
- 2.Sg8#
- 2.Bxh4#
- 2.Qe4#
- 1...Rxc6+!
- threat
- 1.Qf1?
- threat
- 2.Qf3#
- 1...Kxe4
- 2.Sg8#
- 1...Bxe4
- 2.Bf4#
- 1...Se1
- 2.Qxe1#
- 1...Sh4
- 2.Qe1#
- 1...Bf2!
- threat
- 1.Qc5+?
- 1...Kxe4
- 2.Sd2#
- 1...Ke2!
- 1...Kxe4
- 1.Sd5+?
- Keys
- 1.Bf3!
- threat
- 2.Qe2#
- 1...Kxf3
- 2.Bh4#
- 1...Bxf3
- 2.Sd5#
- 1...Bb5
- 2.Qe4#
- 1...Sf4
- 2.Qxf4#
- 1...Sd3
- 2.Qxd3#
- threat
- 1.Bf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- S(d);N_GUARD::QAR1(F)
- S(d);N_GUARD,XP(B)::QAR1(F)
- S(d);N_GUARD::QAR1(F),XS(d)
- P(f);XP(H)::S(J),XP(f)
- Tries
- Try
- S(J);CHECK
- Vars
- S(d);XS(J)::QAR1(F)
- Refutation
- B(e);XS(J)
- Try
- B(G);
- Threat
- DUALS(3)
- Vars
- R(i);::R(E)+B(D),XR(i)
- S(b);::QAR1(F)
- Refutation
- B(e);XB(G)
- Try
- B(G);XB(e)
- Threat
- DUALS(3)
- Vars
- P(h);XB(G)::R(E)+B(D)
- R(i);::R(E)+B(D),XR(i)
- S(b);::QAR1(F)
- Refutation
- R(g);CHECK,XB(G)
- Try
- Q(F);
- Threat
- QAR1(F)
- Vars
- K(c);P-FLIGHT,XB(G)::R(K)+S(J)
- B(e);SBLOCK,XB(G)::R(E)+B(D),DCHECK
- S(b);N_GUARD::QAR2(F),XS(b)
- S(b);N_GUARD::QAR2(F)
- Refutation
- B(a);
- Try
- Q(F);CHECK
- Vars
- K(c);P-FLIGHT,XB(G)::S(A)
- Refutation
- K(c);P-FLIGHT
- Try
- Actual
- B(G);
- Threat
- QAR1(F)
- Vars
- K(c);OGATEB,P-FLIGHT,XB(G)::R(E)+B(D)
- B(e);SBLOCK,XB(G)::R(K)+S(J),DCHECK
- B(e);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
- S(d);N_GUARD::QAR1(F),XS(d)
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).