MESON Chess Problem Database
Problem Display
PID: 200347 (6K1/5Q2/2p1N1pp/b7/N1PPkBP1/1R1b2PP/3Rqp2/2nB4 w - - 0 1)
Laaksonen, Hellmuth
2nd Prize, Suomen Shakki TT, 1957
#2
13 + 9
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Sac5#
- 2.Qxg6#
- 1...Qf3
- 2.Sac5#
- 2.Qxg6#
- 1...Qxg4
- 2.Sac5#
- 1...Qe1
- 2.Sac5#
- 2.Qxg6#
- 1...Qxd2
- 2.Sac5#
- 2.Qxg6#
- 1...Qe3
- 2.Sac5#
- 2.Qxg6#
- 1...Bb1
- 2.Sac5#
- 2.Sec5#
- 2.Qxg6#
- 1...Bc2
- 2.Sac5#
- 2.Sec5#
- 2.Qxg6#
- 1...Bxc4
- 2.Sec5#
- 1...c5
- 2.Qb7#
- 1...Qf1
- Tries
- 1.Bxe2?
- threat
- 2.Sac5#
- 2.Qxg6#
- 1...Bxc4
- 2.Sec5#
- 2.Bf3#
- 1...Sxb3
- 2.Qxg6#
- 1...Bb4
- 2.Qxg6#
- 1...Bb6
- 2.Sc3#
- 2.Qxg6#
- 1...c5
- 2.Saxc5#
- 2.Qxg6#
- 2.Qb7#
- 1...g5
- 2.Sac5#
- 2.Qg6#
- 2.Qf5#
- 2.Qh7#
- 1...Sxe2!
- threat
- 1.Bg5?
- threat
- 2.Sac5#
- 2.Qf4#
- 1...Qxg4
- 2.Sac5#
- 1...Qxd2
- 2.Sac5#
- 2.Bf3#
- 2.Qxg6#
- 2.Qf3#
- 1...Bxc4
- 2.Sec5#
- 1...Bxd2
- 2.Sac5#
- 1...Sxb3
- 2.Qf4#
- 1...f1Q
- 2.Sac5#
- 1...f1R
- 2.Sac5#
- 1...Qf3
- 2.Sac5#
- 2.Bxf3#
- 2.Qxf3#
- 1...Qe3
- 2.Sac5#
- 2.Qxg6#
- 1...Bb4
- 2.Qf4#
- 1...Bb6
- 2.Sc3#
- 2.Qf4#
- 1...Bc7
- 2.Sc3#
- 2.Sac5#
- 1...c5
- 2.Saxc5#
- 2.Qf4#
- 2.Qb7#
- 1...hxg5!
- threat
- 1.Bxh6?
- threat
- 2.Sac5#
- 2.Qf4#
- 1...Qxg4
- 2.Sac5#
- 1...Qxd2
- 2.Sac5#
- 2.Bf3#
- 2.Qxg6#
- 2.Qf3#
- 1...Bxc4
- 2.Sec5#
- 2.Sg5#
- 1...Bxd2
- 2.Sac5#
- 1...Sxb3
- 2.Qf4#
- 1...f1Q
- 2.Sac5#
- 1...f1R
- 2.Sac5#
- 1...Qf3
- 2.Sac5#
- 2.Bxf3#
- 2.Qxf3#
- 1...Qe3
- 2.Sac5#
- 2.Qxg6#
- 1...Bb4
- 2.Qf4#
- 1...Bb6
- 2.Sc3#
- 2.Qf4#
- 1...Bc7
- 2.Sc3#
- 2.Sac5#
- 1...c5
- 2.Saxc5#
- 2.Qf4#
- 2.Qb7#
- 1...g5!
- threat
- 1.Rdxd3?
- threat
- 2.Sac5#
- 2.Sec5#
- 2.Qxg6#
- 1...Qxd3
- 2.Sac5#
- 2.Qxg6#
- 1...Qxg4
- 2.Sac5#
- 2.Sec5#
- 2.Re3#
- 1...Sxb3
- 2.Qxg6#
- 1...Bb4
- 2.Qxg6#
- 1...Bb6
- 2.Qxg6#
- 1...c5
- 2.Saxc5#
- 2.Sexc5#
- 2.Qxg6#
- 2.Qb7#
- 1...g5
- 2.Sac5#
- 2.Sec5#
- 2.Qg6#
- 2.Qf5#
- 2.Qh7#
- 1...Sxd3!
- threat
- 1.Rbxd3?
- threat
- 2.Sac5#
- 2.Sec5#
- 2.Qxg6#
- 1...Qxd3
- 2.Sac5#
- 2.Qxg6#
- 1...Qxg4
- 2.Sac5#
- 2.Sec5#
- 2.Re3#
- 1...Bb4
- 2.Qxg6#
- 1...Bb6
- 2.Sc3#
- 2.Qxg6#
- 1...Sb3
- 2.Qxg6#
- 1...c5
- 2.Saxc5#
- 2.Sexc5#
- 2.Qxg6#
- 2.Qb7#
- 1...g5
- 2.Sac5#
- 2.Sec5#
- 2.Qg6#
- 2.Qf5#
- 2.Qh7#
- 1...Sxd3!
- threat
- 1.Qc7?
- threat
- 2.Qxc6#
- 1...Kf3
- 2.Qxc6#
- 1...Qxg4
- 2.Qe5#
- 1...Bxc4
- 2.Qe5#
- 1...c5
- 2.Qc6#
- 2.Qb7#
- 1...Bxc7!
- threat
- 1.Bxe2?
- Keys
- 1.Qd7!
- threat
- 2.Qxc6#
- 1...Kf3
- 2.Qxc6#
- 1...Qxg4
- 2.Sec5#
- 1...Bxc4
- 2.Sc5#
- 1...c5
- 2.Qc6#
- 2.Qd5#
- 2.Qb7#
- threat
- 1.Qd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- Q(b);XP(J)::S(F)
- B(d);XP(G)::S(K)
- P(g);OGATEB::QAB(L)
- Tries
- Try
- B(A);XQ(b)
- Threat
- DUALS(2)
- Vars
- S(a);XR(C)::QAB(L),XP(h)
- B(f);::QAB(L),XP(h)
- Refutation
- S(a);XB(A)
- Try
- B(I);
- Threat
- DUALS(2)
- Vars
- Q(b);XP(J)::S(F)
- B(d);XP(G)::S(K)
- B(f);XR(B)::S(F)
- S(a);XR(C)::QAR1(L)
- P(c);::S(F)
- B(f);::QAR1(L)
- Refutation
- P(i);XB(I)
- Try
- B(I);XP(i)
- Threat
- DUALS(2)
- Vars
- Q(b);XP(J)::S(F)
- B(f);XR(B)::S(F)
- S(a);XR(C)::QAR1(L)
- P(c);::S(F)
- B(f);::QAR1(L)
- Refutation
- P(h);
- Try
- R(B);XB(d)
- Threat
- DUALS(3)
- Vars
- S(a);XR(C)::QAB(L),XP(h)
- B(f);::QAB(L),XP(h)
- Refutation
- S(a);XR(B)
- Try
- R(C);XB(d)
- Threat
- DUALS(3)
- Vars
- B(f);::QAB(L),XP(h)
- S(a);::QAB(L),XP(h)
- Refutation
- S(a);XR(C)
- Try
- Q(L);
- Threat
- QAB(L),XP(g)
- Vars
- K(e);P_SPINB(d),P_SPINQ(b),S_FLIGHT::QAB(L),XP(g)
- Q(b);XP(J)::QAR1(L)
- B(d);P_PINS(K),XP(G)::QAR1(L)
- Refutation
- B(f);XQ(L)
- Try
- Actual
- Q(L);
- Threat
- QAB(L),XP(g)
- Vars
- K(e);P_SPINB(d),P_SPINQ(b),S_FLIGHT::QAB(L),XP(g)
- Q(b);XP(J)::S(K)
- B(d);P_PINS(K),XP(G)::S(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).