MESON Chess Problem Database
Problem Display
PID: 109626 (3R2r1/n1pNPbp1/P7/pqBk1PKp/Bp4nR/1P1N1p2/8/4Q3 w - - 0 1)
Viksna, Kristaps
Latvian Championship, 1955
#2
12 + 12
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Kc6
- 2.Sb8#
- 1...Qc4
- 2.Sb6#
- 2.Sf6#
- 2.Sf8#
- 1...Qxa6
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 1...Qc6
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 1...Qxd7
- 2.Rxd7#
- 1...Qxc5
- 2.Sb6#
- 2.Sf6#
- 1...Qb6
- 2.Sf4#
- 2.Sxb6#
- 2.Sf6#
- 1...Qb7
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sf8#
- 1...Qb8
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 1...Be6
- 2.Qxe6#
- 1...Bg6
- 2.Qe6#
- 1...Be8
- 2.Qe6#
- 1...Sh2
- 2.Qe4#
- 1...Se5
- 2.Qe4#
- 1...Sh6
- 2.Qe4#
- 1...Sc6
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 1...f2
- 2.Qh1#
- 1...c6
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sf8#
- 1...Kc6
- Tries
- 1.S7e5+?
- 1...Qd7
- 2.Rxd7#
- 1...Rxd8!
- 1...Qd7
- 1.Sb8+?
- 1...Qd7
- 2.Rxd7#
- 1...Rxd8!
- 1...Qd7
- 1.Sf8+?
- 1...Qd7
- 2.Rxd7#
- 1...Kc6!
- 1...Qd7
- 1.Bxb5?
- threat
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sf8#
- 1...Rxd8
- 2.Sf4#
- 1...Re8
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 1...Rf8
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sxf8#
- 1...Be6
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Qxe6#
- 1...Be8
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Qe6#
- 1...Se3
- 2.Sb6#
- 2.Sf6#
- 2.Sf8#
- 2.Rd4#
- 1...Se5
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Rd4#
- 2.Qe4#
- 2.Qxe5#
- 1...Sf6
- 2.Sf4#
- 2.Sb6#
- 2.Sxf6#
- 2.Rd4#
- 2.Qe5#
- 1...Sc6
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Bc4#
- 1...Sc8
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 1...Sxb5!
- threat
- 1.Rxg4?
- threat
- 2.Qe4#
- 1...Kc6
- 2.S7e5#
- 2.Sb8#
- 1...Qxd3
- 2.Qe5#
- 1...Qxc5
- 2.Sb6#
- 2.Sf6#
- 2.Qe5#
- 1...Qc4
- 2.Sb6#
- 2.Sf6#
- 2.Sf8#
- 2.Qe5#
- 2.bxc4#
- 1...hxg4!
- threat
- 1.Qe5+?
- 1...Kc6
- 2.Sb8#
- 1...Sxe5!
- 1...Kc6
- 1.e8Q?
- threat
- 2.Sb6#
- 2.Sf6#
- 2.Q1e4#
- 2.Q8e4#
- 1...Kc6
- 2.S7e5#
- 2.Sb8#
- 1...Qxd3
- 2.Qxf7#
- 1...Qxd7
- 2.Rxd7#
- 2.Qxd7#
- 2.Qxf7#
- 2.Q1e4#
- 2.Q8e4#
- 1...Qxc5
- 2.S7xc5#
- 2.Sb6#
- 2.Sf6#
- 1...Bxe8
- 2.Qe6#
- 1...Sf2
- 2.Sb6#
- 2.Sf6#
- 1...Qc4
- 2.S7e5#
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 2.Qxf7#
- 1...Qb6
- 2.Sf4#
- 2.Sxb6#
- 2.Sf6#
- 2.Q1e4#
- 2.Q8e4#
- 1...Be6
- 2.Sb6#
- 2.Sf6#
- 2.Q1xe6#
- 2.Q8xe6#
- 1...Se3
- 2.Sb6#
- 2.Sf6#
- 2.Qe4#
- 1...Se5
- 2.Sb6#
- 2.Sf6#
- 2.Qe4#
- 1...Sf6
- 2.Sb6#
- 2.Sxf6#
- 1...Rxe8!
- threat
- 1.e8B?
- threat
- 2.Sb6#
- 2.Sf6#
- 1...Kc6
- 2.S7e5#
- 2.Sb8#
- 1...Qxd3
- 2.Bxf7#
- 1...Qxd7
- 2.Bxf7#
- 2.Rxd7#
- 1...Bxe8
- 2.Qe6#
- 1...Qb6
- 2.Sf4#
- 2.Sxb6#
- 2.Sf6#
- 1...Sf6
- 2.Sb6#
- 2.Sxf6#
- 1...Rxe8!
- threat
- 1.S7e5+?
- Keys
- 1.Qd1!
- threat
- 2.Qxf3#
- 1...Ke4
- 2.Sf2#
- 1...Kc6
- 2.Sb8#
- 1...Qxd3
- 2.Qxd3#
- 1...Qxc5
- 2.S3xc5#
- 2.Sf6#
- 1...Qc4
- 2.Sf6#
- 1...Sf2
- 2.Sxb4#
- 1...Sh2
- 2.Sxb4#
- 1...Se5
- 2.Sxb4#
- 1...Sf6
- 2.Sxb4#
- 1...f2
- 2.Qf3#
- 2.Qh1#
- threat
- 1.Qd1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 6
- Sets
- K(f);P_SPINQ(e),S_FLIGHT::S(J)
- Q(e);OGATE,P_SPINQ(e),XS(J)::R(L),XQ(e)
- B(j);N_GUARD::QAB1(A),XB(j)
- B(j);N_GUARD::QAB1(A)
- S(c);::QAB1(A)
- P(a);OGATEB::QAB(A)
- Tries
- Try
- S(J);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e)::R(L),XQ(e)
- Refutation
- R(l);XR(L)
- Try
- S(J);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e)::R(L),XQ(e)
- Refutation
- R(l);XR(L)
- Try
- S(J);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e)::R(L),XQ(e)
- Refutation
- K(f);P_SPINQ(e),S_FLIGHT
- Try
- B(D);XQ(e)
- Threat
- DUALS(4)
- Vars
- R(l);XR(L)::S(C)
- Refutation
- S(h);XB(D)
- Try
- R(E);XS(c)
- Threat
- QAB1(A)
- Vars
- Q(e);XS(C)::QAR1(A)
- Refutation
- P(g);XR(E)
- Try
- Q(A);CHECK
- Vars
- K(f);P_SPINQ(e),S_FLIGHT::S(J)
- Refutation
- S(c);XQ(A)
- Try
- P(K);
- Threat
- DUALS(4)
- Vars
- Q(e);XS(C)::QAB(K),XB(j)
- B(j);N_GUARD,XQ(K)::QAB1(A)
- Refutation
- R(l);XQ(K)
- Try
- P(K);
- Threat
- DUALS(2)
- Vars
- Q(e);XS(C)::B(K),XB(j)
- B(j);N_GUARD,XB(K)::QAB1(A)
- Refutation
- R(l);XB(K)
- Try
- Actual
- Q(A);
- Threat
- QAB(A),XP(a)
- Vars
- K(f);P_SPINS(c),S_FLIGHT::S(C)
- K(f);P_SPINQ(e),S_FLIGHT::S(J)
- Q(e);OGATE,P_SPINQ(e),XS(C)::QAR2(A),XQ(e)
- Q(e);::R(L)+S(J),DCHECK
- S(c);::QAR(A)+S(C),DCHECK,XP(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).