MESON Chess Problem Database
Problem Display
PID: 250643 (4B1n1/3br3/8/2b4R/2p1k2n/4P2p/3PK2B/3R2Q1 w - - 0 1)
Jansen, R
Schakend Nederland, 1980
#2
8 + 8
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Re5
- 2.Rxe5#
- 1...Re6
- 2.Qg4#
- 1...Rf7
- 2.Re5#
- 1...Rg7
- 2.Re5#
- 1...Rh7
- 2.Re5#
- 1...Bxe3
- 2.Qxe3#
- 1...Ba4
- 2.Qg4#
- 1...Bg4+
- 2.Qxg4#
- 1...Bb5
- 2.Qg4#
- 1...Bf5
- 2.Bc6#
- 1...Bc6
- 2.Bxc6#
- 2.Qg4#
- 1...Be6
- 2.Re5#
- 1...Bc8
- 2.Bc6#
- 1...Bxe8
- 2.Qg4#
- 1...Sf5
- 2.Qh1#
- 1...Sg6
- 2.Qh1#
- 1...c3
- 2.d3#
- 1...Re5
- Tries
- 1.Bg6+?
- 1...Sf5
- 2.Qh1#
- 1...Sxg6
- 2.Qh1#
- 1...Bf5!
- 1...Sf5
- 1.Bxd7?
- threat
- 2.Bc6#
- 2.Qg4#
- 1...Rxd7
- 2.Re5#
- 2.Qg4#
- 1...Bxe3
- 2.Qxe3#
- 1...Re5
- 2.Rxe5#
- 1...Sf5
- 2.Bc6#
- 2.Qh1#
- 1...Re6
- 2.Qg4#
- 1...Rf7
- 2.Bc6#
- 2.Re5#
- 1...Rg7
- 2.Bc6#
- 2.Re5#
- 1...Bd6
- 2.Bc6#
- 1...Sg2
- 2.Bc6#
- 1...Sg6
- 2.Bc6#
- 2.Qh1#
- 2.Qxg6#
- 1...Sh6
- 2.Bc6#
- 1...Sf6!
- threat
- 1.Qh1+?
- 1...Sf3
- 2.Qxf3#
- 1...Sg2!
- 1...Sf3
- 1.Qg3?
- threat
- 2.Qf4#
- 1...Bg4+
- 2.Qxg4#
- 1...Bxe3
- 2.Qxe3#
- 1...Re5
- 2.Rxe5#
- 2.Qxe5#
- 1...Bf5
- 2.Bc6#
- 1...Sf5
- 2.Qf3#
- 1...Rf7
- 2.Re5#
- 2.Qe5#
- 1...Sg2
- 2.Qf3#
- 1...Sg6
- 2.Qf3#
- 1...Bd6!
- threat
- 1.Qg5?
- threat
- 2.Qf4#
- 2.Qd5#
- 1...Bg4+
- 2.Qxg4#
- 1...Bxe3
- 2.Qxe3#
- 2.Qd5#
- 1...Re5
- 2.Qxe5#
- 1...Bf5
- 2.Bc6#
- 1...Rf7
- 2.Qd5#
- 2.Qe5#
- 1...Bd6
- 2.Qd5#
- 1...Bc6
- 2.Bxc6#
- 2.Rxh4#
- 2.Qf4#
- 2.Qxh4#
- 2.Qg4#
- 1...Be6
- 2.Qf4#
- 2.Qe5#
- 1...Sg2
- 2.Qd5#
- 1...Sg6
- 2.Qd5#
- 1...Sf6
- 2.Qf4#
- 1...Sf5!
- threat
- 1.Qxg8?
- threat
- 2.Qd5#
- 1...Bg4+
- 2.Qxg4#
- 1...Re5
- 2.Rxe5#
- 1...Re6
- 2.Qg4#
- 1...Rf7
- 2.Re5#
- 1...Bf5
- 2.Bc6#
- 1...Bc6
- 2.Bxc6#
- 2.Qg4#
- 1...Be6
- 2.Re5#
- 1...Sf5!
- threat
- 1.Bg6+?
- Keys
- 1.Ra1!
- threat
- 2.Qb1#
- 1...Bg4+
- 2.Qxg4#
- 1...Bxe3
- 2.Qxe3#
- 1...Re5
- 2.Rxe5#
- 1...Bf5
- 2.Bc6#
- 1...Sf5
- 2.Qh1#
- 1...Ba4
- 2.Qg4#
- 1...c3
- 2.d3#
- threat
- 1.Ra1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- R(g);N_GUARD::R1(G),XR(g)
- R(g);S_CUTB(f)::QAR2(B)
- R(g);N_GUARD::R1(G)
- B(e);OGATE,XP(F)::QAR1(B),XB(e)
- B(f);N_GUARD::QAR2(B)
- B(f);CHECK,N_GUARD::QAR2(B),XB(f)
- B(f);OGATE::B(H)
- B(f);S_CUTR(g)::R1(G)
- B(f);N_GUARD,XB(H)::QAR2(B)
- S(d);N_GUARD::QAB(B)
- P(b);N_GUARD::P(C)
- Tries
- Try
- B(H);CHECK
- Vars
- S(d);P_SPINS(d)::QAB(B)
- S(d);XB(H)::QAB(B)
- Refutation
- B(f);P_SPINB(f)
- Try
- B(H);XB(f)
- Threat
- DUALS(2)
- Vars
- B(e);OGATE,XP(F)::QAR1(B),XB(e)
- R(g);N_GUARD::R1(G),XR(g)
- R(g);::QAR2(B)
- B(e);::B(H)
- S(d);::B(H)
- S(h);::B(H)
- Refutation
- S(h);
- Try
- Q(B);CHECK
- Vars
- S(d);N_GUARD,P_SPINS(d)::QAB1(B),XS(d)
- Refutation
- S(d);P_SPINS(d)
- Try
- Q(B);
- Threat
- QAR1(B)
- Vars
- B(f);CHECK,N_GUARD::QAR2(B),XB(f)
- B(e);OGATE,XP(F)::QAR1(B),XB(e)
- B(f);OGATE::B(H)
- S(d);N_GUARD::QAB1(B)
- Refutation
- B(e);
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- B(f);CHECK,N_GUARD::QAR2(B),XB(f)
- R(g);N_GUARD::QAR1(B),XR(g)
- B(f);OGATE::B(H)
- B(e);::QAB1(B)
- S(d);::QAB1(B)
- S(h);::QAR1(B)
- Refutation
- S(d);
- Try
- Q(B);XS(h)
- Threat
- QAB1(B)
- Vars
- B(f);CHECK,N_GUARD::QAR2(B),XB(f)
- R(g);N_GUARD::R1(G),XR(g)
- R(g);S_CUTB(f)::QAR2(B)
- R(g);N_GUARD::R1(G)
- B(f);OGATE::B(H)
- B(f);S_CUTR(g)::R1(G)
- Refutation
- S(d);
- Try
- Actual
- R(A);
- Threat
- QAB(B)
- Vars
- B(f);CHECK,N_GUARD::QAR2(B),XB(f)
- B(e);OGATE,XP(F)::QAR1(B),XB(e)
- R(g);N_GUARD::R1(G),XR(g)
- B(f);OGATE::B(H)
- S(d);N_GUARD::QAB(B)
- B(f);N_GUARD::QAR2(B)
- P(b);N_GUARD::P(C)
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).