MESON Chess Problem Database
Problem Display
PID: 150642 (1b5Q/5N2/6R1/1npk1P1N/2p4R/2qP2BK/8/8 w - - 0 1)
Kovalev, N
Shakhmaty v SSSR, 1949
#2
9 + 6
| 23 | Die Schwalbe | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.dxc4#
- 1...Qe1
- 2.dxc4#
- 1...Qb2
- 2.dxc4#
- 1...Qd2
- 2.dxc4#
- 1...Qa5
- 2.dxc4#
- 1...Qe5
- 2.dxc4#
- 1...Qg7
- 2.dxc4#
- 1...Qxh8
- 2.dxc4#
- 1...Qa3
- 2.dxc4#
- 1...Bxg3
- 2.Qa8#
- 1...Bf4
- 2.Sxf4#
- 1...Be5
- 2.Qa8#
- 1...Bd6
- 2.Qa8#
- 1...Ba7
- 2.Sf4#
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...Sc7
- 2.Sf4#
- 2.Rd6#
- 2.Qd8#
- 1...Qa1
- Tries
- 1.Sd8?
- threat
- 2.Qg8#
- 1...Qxh8
- 2.dxc4#
- 1...Qe1
- 2.Sf6#
- 2.dxc4#
- 1...Qe5
- 2.dxc4#
- 1...Qf6
- 2.Sxf6#
- 2.dxc4#
- 1...Qg7
- 2.dxc4#
- 1...Bf4
- 2.Sxf4#
- 1...Sd4
- 2.Sf6#
- 1...Sd6
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 2.Rd6#
- 1...Bxg3!
- threat
- 1.Rd6+?
- 1...Bxd6
- 2.Qa8#
- 1...Sxd6!
- 1...Bxd6
- 1.Qe5+?
- 1...Qxe5
- 2.dxc4#
- 1...Bxe5!
- 1...Qxe5
- 1.Qxb8?
- threat
- 2.Qb7#
- 2.Qa8#
- 1...Sd6
- 2.Rxd6#
- 2.Qxd6#
- 1...Qa1
- 2.Qb7#
- 2.dxc4#
- 1...Qa5
- 2.Qe5#
- 2.Qb7#
- 2.dxc4#
- 1...Qh8
- 2.Qb7#
- 2.dxc4#
- 1...Qa3
- 2.Qe5#
- 2.Qb7#
- 2.dxc4#
- 1...Sd4
- 2.Sf4#
- 2.Rd6#
- 2.Qe5#
- 2.Qd6#
- 2.Qd8#
- 1...Sa7
- 2.Rd6#
- 2.Qd6#
- 2.Qd8#
- 1...Sc7
- 2.Rd6#
- 2.Qb7#
- 2.Qd8#
- 1...Qf6!
- threat
- 1.Qd8+?
- 1...Bd6
- 2.Qa8#
- 1...Sd6!
- 1...Bd6
- 1.Qe8?
- threat
- 2.Qc6#
- 2.Qe4#
- 2.Qe6#
- 1...Qxd3
- 2.Sf6#
- 2.Qc6#
- 2.Qe6#
- 1...Bf4
- 2.Qe4#
- 1...Qd4
- 2.Qc6#
- 2.Qe6#
- 1...Qe1
- 2.Sf6#
- 2.Qc6#
- 2.dxc4#
- 1...Qe5
- 2.Qc6#
- 2.dxc4#
- 1...Qf6
- 2.Sxf6#
- 2.Qe4#
- 2.dxc4#
- 1...Be5
- 2.Qc6#
- 2.Qe6#
- 2.Qa8#
- 1...Bd6
- 2.Qe4#
- 2.Qa8#
- 1...Sd4
- 2.Sf6#
- 2.Qe4#
- 1...Sa7
- 2.Qe4#
- 2.Qe6#
- 1...Sc7
- 2.Rd6#
- 2.Qc6#
- 2.Qd7#
- 2.Qe4#
- 2.Qd8#
- 1...Sd6!
- threat
- 1.Sd8?
- Keys
- 1.Se5!
- threat
- 2.Qg8#
- 1...Qxe5
- 2.dxc4#
- 1...Sd4
- 2.Sf4#
- 1...Sd6
- 2.Sf6#
- 1...Sc7
- 2.Qd8#
- threat
- 1.Se5!
This is a version of 140340
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 13
- Sets
- Q(a);N_GUARD::P(A),XP(b)
- Q(a);N_GUARD,XQ(I)::P(A),XP(b)
- B(f);OGATE,XB(B)::QAB(I)
- B(f);N_GUARD::S(F),XB(f)
- B(f);OGATE::QAB(I)
- Tries
- Try
- S(H);
- Threat
- QAB(I)
- Vars
- Q(a);N_GUARD,XQ(I)::P(A),XP(b)
- Q(a);N_GUARD::P(A),XP(b)
- B(f);N_GUARD::S(F),XB(f)
- S(c);S_CUTQ(a)::S(F)
- S(c);S_CUTB(f)::S(F)
- Refutation
- B(f);XB(B)
- Try
- R(G);CHECK
- Vars
- B(f);OGATE,XR(G)::QAB(I)
- Refutation
- S(c);XR(G)
- Try
- Q(I);CHECK
- Vars
- Q(a);XQ(I)::P(A),XP(b)
- Refutation
- B(f);XQ(I)
- Try
- Q(I);XB(f)
- Threat
- DUALS(2)
- Refutation
- Q(a);
- Try
- Q(I);CHECK
- Vars
- B(f);OGATE,P_SPINB(f)::QAB(I)
- Refutation
- S(c);P_SPINS(c)
- Try
- Q(I);
- Threat
- DUALS(3)
- Vars
- B(f);::QAB1(I)
- Refutation
- S(c);
- Try
- Actual
- S(H);
- Threat
- QAB(I)
- Vars
- Q(a);N_GUARD,XS(H)::P(A),XP(b)
- S(c);SBLOCK::S(F)
- S(c);N_GUARD,S_CUTB(f)::QAR(I)
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).