MESON Chess Problem Database
Problem Display
PID: 63716 (2b5/r3Q3/8/pNN2kBP/K3R1nP/2p5/2pq4/8 w - - 0 1)
Tikkanen, Tapani
2nd HM., Suomen Tehtavaniekat TT, 1975
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Sd4#
- 2.Sd6#
- 1...Qe1
- 2.Sd4#
- 2.Sd6#
- 2.Rf4#
- 1...Qe3
- 2.Sd6#
- 1...Qf4
- 2.Sd4#
- 2.Rxf4#
- 1...Qxg5
- 2.Sd4#
- 2.Sd6#
- 2.Qxg5#
- 1...Qd1
- 2.Rf4#
- 1...Qe2
- 2.Sd4#
- 2.Sd6#
- 2.Rf4#
- 1...Qf2
- 2.Sd6#
- 1...Qg2
- 2.Sd4#
- 2.Sd6#
- 2.Rf4#
- 1...Qh2
- 2.Sd4#
- 1...Qd3
- 2.Rf4#
- 1...Qd4+
- 2.Sxd4#
- 1...Qd5
- 2.Rf4#
- 1...Qd6
- 2.Sxd6#
- 1...Qd7
- 2.Rf4#
- 1...Qd8
- 2.Rf4#
- 1...Rd7
- 2.Qe6#
- 1...Ra8
- 2.Qh7#
- 1...Ba6
- 2.Qe6#
- 1...Be6
- 2.Qxe6#
- 1...Bb7
- 2.Qe6#
- 2.Qh7#
- 1...Bd7
- 2.Qh7#
- 1...Sf2
- 2.Qf6#
- 2.Qe5#
- 1...Sh2
- 2.Qf6#
- 2.Qe5#
- 1...Se3
- 2.Rf4#
- 2.Qf6#
- 2.Qe5#
- 1...Se5
- 2.Qf6#
- 2.Qxe5#
- 1...Sf6
- 2.Qxf6#
- 2.Qe5#
- 1...Sh6
- 2.Qf6#
- 2.Qe5#
- 1...Qc1
- Tries
- 1.Sd7?
- threat
- 2.Qe6#
- 2.Qh7#
- 1...Qd4+
- 2.Sxd4#
- 1...Qxg5
- 2.Sd4#
- 2.Sd6#
- 2.Qe6#
- 1...Qxd7
- 2.Rf4#
- 1...Rxd7
- 2.Qe6#
- 1...Bxd7
- 2.Qh7#
- 1...Se5
- 2.Qxe5#
- 1...Qd5
- 2.Rf4#
- 2.Qh7#
- 1...Qd6
- 2.Sxd6#
- 1...Sf6
- 2.Qe5#
- 2.Qe6#
- 1...Ra6!
- threat
- 1.Bxd2?
- threat
- 2.Sd4#
- 2.Sd6#
- 2.Rf4#
- 2.Qg5#
- 1...cxd2
- 2.Sd4#
- 2.Sd6#
- 2.Qg5#
- 1...Ra6
- 2.Sd4#
- 2.Rf4#
- 2.Qg5#
- 1...Rd7
- 2.Rf4#
- 2.Qg5#
- 2.Qe6#
- 1...Be6
- 2.Sd4#
- 2.Sd6#
- 2.Qg5#
- 2.Qxe6#
- 1...Bd7
- 2.Rf4#
- 2.Qg5#
- 1...Se3
- 2.Sd4#
- 2.Sd6#
- 2.Qg5#
- 2.Qe5#
- 1...Sf6
- 2.Sd4#
- 2.Sd6#
- 2.Rf4#
- 2.Qe5#
- 1...Rxe7!
- threat
- 1.Be3?
- threat
- 2.Rf4#
- 2.Qg5#
- 1...Qd4+
- 2.Sxd4#
- 1...Qxe3
- 2.Sd6#
- 1...Sxe3
- 2.Qg5#
- 2.Qe5#
- 1...Qf2
- 2.Sd4#
- 2.Sd6#
- 2.Qg5#
- 1...Qh2
- 2.Sd4#
- 2.Qg5#
- 1...Qd6
- 2.Sxd6#
- 2.Qg5#
- 1...Qd8
- 2.Rf4#
- 1...Be6
- 2.Qg5#
- 2.Qxe6#
- 1...Sf6
- 2.Rf4#
- 2.Qe5#
- 1...Rxe7!
- threat
- 1.Rc4?
- threat
- 2.Qe4#
- 1...Qxg5
- 2.Sd6#
- 2.Qxg5#
- 1...Be6
- 2.Qxe6#
- 1...Qe1
- 2.Sd4#
- 2.Sd6#
- 2.Rf4#
- 1...Qe3
- 2.Sd6#
- 1...Qf4
- 2.Rxf4#
- 1...Qe2
- 2.Sd4#
- 2.Sd6#
- 2.Rf4#
- 1...Qg2
- 2.Sd4#
- 2.Sd6#
- 2.Rf4#
- 1...Qd3
- 2.Rf4#
- 1...Qd4
- 2.Sxd4#
- 1...Qd5
- 2.Rf4#
- 1...Bb7
- 2.Qe6#
- 1...Sf2
- 2.Qf6#
- 1...Se5
- 2.Qf6#
- 1...Sf6
- 2.Qxf6#
- 1...Rxe7!
- threat
- 1.Rd4?
- threat
- 2.Sd6#
- 2.Qe4#
- 1...Qxd4+
- 2.Sxd4#
- 1...Qxg5
- 2.Sd6#
- 2.Qxg5#
- 1...Be6
- 2.Qxe6#
- 1...Qe1
- 2.Sd6#
- 2.Rf4#
- 1...Qe3
- 2.Sd6#
- 1...Qf4
- 2.Rxf4#
- 1...Qe2
- 2.Sd6#
- 2.Rf4#
- 1...Qg2
- 2.Sd6#
- 2.Rf4#
- 1...Qh2
- 2.Qe4#
- 1...Qd3
- 2.Sd6#
- 2.Rf4#
- 1...Ra6
- 2.Qe4#
- 1...Rd7
- 2.Qe4#
- 2.Qe6#
- 1...Bb7
- 2.Sd6#
- 2.Qe6#
- 1...Bd7
- 2.Qe4#
- 1...Sf2
- 2.Sd6#
- 2.Qf6#
- 1...Se5
- 2.Sd6#
- 2.Qf6#
- 1...Sf6
- 2.Sd6#
- 2.Qxf6#
- 1...Rxe7!
- threat
- 1.Qf8+?
- 1...Sf6
- 2.Qxf6#
- 1...Rf7!
- 1...Sf6
- 1.Qf7+?
- 1...Sf6
- 2.Qg6#
- 2.Qxf6#
- 1...Rxf7!
- 1...Sf6
- 1.Sd7?
- Keys
- 1.Sd3!
- threat
- 2.Sd4#
- 2.Sd6#
- 1...Qxd3
- 2.Rf4#
- 1...Rxe7
- 2.Sd6#
- 1...Be6
- 2.Sd6#
- 2.Qxe6#
- 1...Se5
- 2.Sd6#
- 2.Qxe5#
- 1...Qe3
- 2.Sd6#
- 1...Qf4
- 2.Sd4#
- 2.Rxf4#
- 1...Qf2
- 2.Sd6#
- 1...Qh2
- 2.Sd4#
- 1...Ra6
- 2.Sd4#
- 1...Rd7
- 2.Qe6#
- 1...Bd7
- 2.Qh7#
- threat
- 1.Sd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- Q(b);N_GUARD::S(D)
- Q(b);N_GUARD::R1(B)
- Q(b);CHECK,N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD,P_PINS(D)::R1(B)
- R(g);S_CUTB(h)::QAB1(H)
- R(g);N_GUARD::QAB(H)
- B(h);N_GUARD::QAB1(H)
- B(h);N_GUARD::QAB1(H),XB(h)
- B(h);P_PINS(D),S_CUTR(g)::QAB(H)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD,P_PINS(D),XS(E)::R1(B)
- R(g);XS(E)::QAB1(H)
- B(h);P_PINS(D),XS(E)::QAB(H)
- S(d);N_GUARD::QAR1(H),XS(d)
- Q(b);N_GUARD::S(D),XQ(b)
- Refutation
- R(g);
- Try
- B(F);XQ(b)
- Threat
- DUALS(4)
- Refutation
- R(g);XQ(H)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,N_GUARD::S(D),XQ(b)
- Q(b);N_GUARD,XB(F)::S(D)
- Q(b);::R1(B)
- Refutation
- R(g);XQ(H)
- Try
- R(B);
- Threat
- QAB1(H)
- Vars
- B(h);N_GUARD::QAB1(H),XB(h)
- Q(b);N_GUARD::S(D)
- Q(b);N_GUARD,P_PINR(B)::R1(B),XQ(b)
- Q(b);N_GUARD::R1(B)
- Q(b);N_GUARD,P_PINR(B)::S(D),XQ(b)
- B(h);N_GUARD::QAB1(H)
- S(d);N_GUARD::QAR1(H)
- S(d);N_GUARD::QAR1(H),XS(d)
- Refutation
- R(g);XQ(H)
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,XR(B)::S(D),XQ(b)
- B(h);N_GUARD::QAB1(H),XB(h)
- Q(b);::S(D)
- Q(b);N_GUARD,P_PINR(B)::R1(B),XQ(b)
- Q(b);::QAB1(H)
- R(g);::QAB1(H)
- B(h);P_PINS(D)::QAB1(H)
- Refutation
- R(g);XQ(H)
- Try
- Q(H);CHECK
- Vars
- S(d);N_GUARD,P_SPINS(d)::QAR1(H),XS(d)
- Refutation
- R(g);P_SPINR(g)
- Try
- Q(H);CHECK
- Refutation
- R(g);XQ(H)
- Try
- Actual
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD,XS(E)::R1(B)
- R(g);XQ(H)::S(D)
- Q(b);::S(D)
- R(g);::S(D)
- R(g);S_CUTB(h)::QAB1(H)
- B(h);P_PINS(D),S_CUTR(g)::QAB(H)
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).