MESON Chess Problem Database
Problem Display
PID: 67793 (1K3b2/3p3r/N2k1BQ1/1P1P2nR/8/qp2N3/B3R3/2nr3b w - - 0 1)
Widlert, Kjell Einar
3rd Prize, Bonn, 1992
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxd5
- 2.Sc4#
- 1...Bxd5
- 2.Sf5#
- 1...Sf3
- 2.Sc4#
- 2.Bh4#
- 2.Bd8#
- 1...Sh3
- 2.Sc4#
- 2.Bh4#
- 2.Bd8#
- 1...Se4
- 2.Sc4#
- 1...Se6
- 2.Sc4#
- 1...Sf7
- 2.Sc4#
- 2.Bh4#
- 2.Bd8#
- 1...b2
- 2.Sf5#
- 1...Rxd5
- Tries
- 1.Bb2+?
- 1...Se6
- 2.Bxa3#
- 1...Ke7!
- 1...Se6
- 1.Bd8+?
- 1...Se6
- 2.Sc4#
- 1...Ke5!
- 1...Se6
- 1.Rxg5?
- threat
- 2.Sc4#
- 2.Bd8#
- 1...Bxd5
- 2.Sf5#
- 1...Qb2
- 2.Sc4#
- 1...Qb4
- 2.Bd8#
- 1...Qc5
- 2.Bd8#
- 1...Qa4
- 2.Bd8#
- 1...Rf1
- 2.Sc4#
- 1...Rd4
- 2.Bd8#
- 1...Rh4
- 2.Bd8#
- 1...Rh6
- 2.Sc4#
- 1...Re7
- 2.Sc4#
- 2.Be5#
- 1...Rf7
- 2.Sc4#
- 1...Rg7
- 2.Sc4#
- 1...Be4
- 2.Sc4#
- 1...Be7
- 2.Sc4#
- 2.Be5#
- 1...Bg7
- 2.Sc4#
- 1...Qxa6!
- threat
- 1.Qe4?
- threat
- 2.Sc4#
- 2.Sf5#
- 2.Qf4#
- 2.Qe5#
- 1...Qxa6
- 2.Qb4#
- 1...Rxd5
- 2.Sc4#
- 1...Sxe2
- 2.Sc4#
- 2.Sf5#
- 2.Qe5#
- 1...Sxe4
- 2.Sc4#
- 1...Se6
- 2.Sc4#
- 2.Sf5#
- 2.Qe5#
- 1...Qb2
- 2.Sc4#
- 2.Sf5#
- 2.Qb4#
- 1...Qb4
- 2.Sf5#
- 2.Qxb4#
- 2.Qe5#
- 1...Qc5
- 2.Sf5#
- 2.Qf4#
- 2.Qe5#
- 1...Qa4
- 2.Sf5#
- 2.Qe5#
- 1...Rf1
- 2.Sc4#
- 2.Qe5#
- 1...Rd4
- 2.Sf5#
- 2.Qe5#
- 1...Re7
- 2.Sc4#
- 2.Sf5#
- 1...Sd3
- 2.Sc4#
- 2.Sf5#
- 1...Sf3
- 2.Sc4#
- 2.Sf5#
- 1...Sh3
- 2.Sc4#
- 2.Sf5#
- 2.Qe5#
- 1...Sf7
- 2.Sc4#
- 2.Sf5#
- 1...Bxe4!
- threat
- 1.Qf5?
- threat
- 2.Sc4#
- 2.Qf4#
- 2.Qe5#
- 1...Rxd5
- 2.Sc4#
- 1...Bxd5
- 2.Qe5#
- 1...Sxe2
- 2.Sc4#
- 2.Qe5#
- 1...Se6
- 2.Sc4#
- 2.Qe5#
- 1...Qb2
- 2.Sc4#
- 1...Qb4
- 2.Qe5#
- 1...Qc5
- 2.Qf4#
- 2.Qe5#
- 1...Qa4
- 2.Qe5#
- 1...Rf1
- 2.Sc4#
- 2.Qe5#
- 1...Rd4
- 2.Qe5#
- 1...Re7
- 2.Sc4#
- 1...Sd3
- 2.Sc4#
- 1...Sf3
- 2.Sc4#
- 1...Sh3
- 2.Sc4#
- 2.Qe5#
- 1...Sf7
- 2.Sc4#
- 1...Qxa6!
- threat
- 1.Qxg5?
- threat
- 2.Sc4#
- 2.Be5#
- 2.Qf4#
- 2.Qg3#
- 2.Qe5#
- 1...Rxd5
- 2.Sc4#
- 1...Rxh5
- 2.Sc4#
- 2.Be5#
- 1...Bxd5
- 2.Sf5#
- 2.Qe5#
- 1...Sxe2
- 2.Sc4#
- 2.Be5#
- 2.Qe5#
- 1...Qb2
- 2.Sc4#
- 1...Qb4
- 2.Be5#
- 2.Qe5#
- 1...Qc5
- 2.Be5#
- 2.Qf4#
- 2.Qg3#
- 2.Qe5#
- 1...Qa4
- 2.Be5#
- 2.Qe5#
- 1...Rf1
- 2.Sc4#
- 2.Be5#
- 2.Qe5#
- 1...Rg1
- 2.Sc4#
- 2.Be5#
- 2.Qf4#
- 2.Qe5#
- 1...Rd4
- 2.Be5#
- 2.Qe5#
- 1...Re7
- 2.Sc4#
- 1...Rg7
- 2.Sc4#
- 2.Be5#
- 2.Qf4#
- 2.Qe5#
- 1...Bh6
- 2.Sc4#
- 2.Be5#
- 2.Qe5#
- 1...Bg7
- 2.Sc4#
- 2.Be7#
- 2.Qf4#
- 2.Qg3#
- 2.Qe5#
- 1...Sd3
- 2.Sc4#
- 1...Qxa6!
- threat
- 1.Bb2+?
- Keys
- 1.Qc2!
- threat
- 2.Qc7#
- 1...Rxd5
- 2.Sc4#
- 1...Bxd5
- 2.Sf5#
- 1...bxc2
- 2.Sf5#
- 1...Se6
- 2.Sc4#
- 1...Qc5
- 2.Qxc5#
- 1...Qa5
- 2.Qc5#
- threat
- 1.Qc2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- R(b);SBLOCK,XP(E)::S(C)
- B(c);SBLOCK,XP(E)::S(C)
- S(f);::S(C)
- P(e);::S(C)
- Tries
- Try
- B(H);CHECK
- Vars
- S(f);P_SPINS(f)::B(H),XQ(d)
- Refutation
- K(g);S_FLIGHT
- Try
- B(H);CHECK
- Vars
- S(f);P_SPINS(f)::S(C)
- Refutation
- K(g);P_SPINS(f),S_FLIGHT
- Try
- R(F);XS(f)
- Threat
- DUALS(2)
- Vars
- B(c);SBLOCK,XP(E)::S(C)
- Q(d);::S(C)
- Q(d);P_PINP(D)::QAR(I)+B(H)
- Q(d);::QAR(I)+B(H)
- R(b);::S(C)
- R(b);::QAR(I)+B(H)
- R(i);::QAR(I)+B(H)
- R(i);::S(C)
- B(c);::S(C)
- B(j);::S(C)
- Refutation
- Q(d);XS(G)
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- Q(d);N_GUARD,XS(G)::QAB(I)
- R(b);XP(E)::S(C)
- S(f);XQ(I)::S(C)
- Refutation
- B(c);XQ(I)
- Try
- Q(I);
- Threat
- DUALS(3)
- Vars
- R(b);XP(E)::S(C)
- B(c);XP(E)::QAB1(I)
- Q(d);::S(C)
- Q(d);P_PINP(D)::QAB1(I)
- Q(d);::QAB1(I)
- R(b);::QAB1(I)
- R(i);::S(C)
- S(a);::S(C)
- S(f);::S(C)
- Refutation
- Q(d);XS(G)
- Try
- Q(I);XS(f)
- Threat
- DUALS(5)
- Vars
- R(b);XP(E)::S(C)
- Q(d);::S(C)
- R(i);::S(C)
- S(a);::S(C)
- Refutation
- Q(d);XS(G)
- Try
- Actual
- Q(I);
- Threat
- QAB1(I)
- Vars
- R(b);SBLOCK,XP(E)::S(C)
- B(c);SBLOCK,XP(E)::S(C)
- P(e);XQ(I)::S(C)
- S(f);::S(C)
- Q(d);N_GUARD::QAB1(I),XQ(d)
- Q(d);N_GUARD::QAB1(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).