MESON Chess Problem Database
Problem Display
PID: 169822 (2n1Q3/1p2q1b1/3r2n1/1R4N1/N2k1p2/8/B1PB4/5R1K w - - 0 1)
Jonsson, Nils Gustav Helmer
2nd Prize, Danish Ty, 1945
#2
9 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxg5
- 2.Bc3#
- 2.Rb4#
- 1...Qf6
- 2.Sf3#
- 2.Bc3#
- 2.Rb4#
- 2.Qe4#
- 1...Qd8
- 2.Sf3#
- 2.Bc3#
- 2.Rb4#
- 2.Qe4#
- 1...Qf8
- 2.Sf3#
- 2.Bc3#
- 2.Rb4#
- 2.Qe4#
- 1...Qe1
- 2.Sf3#
- 2.Rb4#
- 1...Qe2
- 2.Bc3#
- 1...Qe3
- 2.Rb4#
- 1...Qe4+
- 2.Qxe4#
- 1...Qe5
- 2.Rb4#
- 1...Qc7
- 2.Sf3#
- 2.Qe4#
- 1...Qd7
- 2.Sf3#
- 2.Bc3#
- 2.Rb4#
- 2.Qe4#
- 1...Qf7
- 2.Sf3#
- 2.Bc3#
- 2.Qe4#
- 1...Rd5
- 2.Rxd5#
- 1...Ra6
- 2.Rd5#
- 1...Rb6
- 2.Rd5#
- 1...Rc6
- 2.Rd5#
- 1...Re6
- 2.Rd5#
- 1...Rf6
- 2.Rd5#
- 1...Be5
- 2.Rb4#
- 1...Se5
- 2.Rxf4#
- 1...Qxg5
- Tries
- 1.Sb2?
- threat
- 2.c3#
- 1...Qe4+
- 2.Qxe4#
- 1...Rd5
- 2.Rxd5#
- 1...Qc7
- 2.Sf3#
- 2.Qe4#
- 1...Rc6
- 2.Rd5#
- 1...Qe3!
- threat
- 1.Be3+?
- 1...Qxe3
- 2.Rb4#
- 1...fxe3
- 2.Rd1#
- 1...Kxe3!
- 1...Qxe3
- 1.Rd1?
- threat
- 2.Bc1#
- 2.Bxf4#
- 1...Qe1+
- 2.Bxe1#
- 1...Qe4+
- 2.Qxe4#
- 1...Rd5
- 2.Bxf4#
- 2.Rxd5#
- 1...Qe3
- 2.Bc3#
- 2.Bxe3#
- 2.Rb4#
- 1...Qe2
- 2.Bc3#
- 2.Be3#
- 1...f3
- 2.Bc1#
- 2.Bf4#
- 1...Se5!
- threat
- 1.Re1?
- threat
- 2.Sf3#
- 2.Bc3#
- 2.Rb4#
- 1...Qe4+
- 2.Rxe4#
- 2.Qxe4#
- 1...Qxg5
- 2.Bc3#
- 2.Re4#
- 2.Rb4#
- 2.Qe4#
- 1...Qe3
- 2.Rb4#
- 1...Qe2
- 2.Bc3#
- 1...Qe6
- 2.Sf3#
- 2.Bc3#
- 1...Qc7
- 2.Sf3#
- 2.Re4#
- 2.Qe4#
- 1...Qf7
- 2.Sf3#
- 2.Bc3#
- 2.Re4#
- 2.Qe4#
- 1...Rd5
- 2.Sf3#
- 2.Bc3#
- 2.Rxd5#
- 1...Ra6
- 2.Sf3#
- 2.Bc3#
- 2.Rd5#
- 1...Rb6
- 2.Sf3#
- 2.Bc3#
- 2.Rd5#
- 1...Rc6
- 2.Sf3#
- 2.Rd5#
- 1...Re6
- 2.Sf3#
- 2.Bc3#
- 2.Rd5#
- 1...Rf6
- 2.Sf3#
- 2.Bc3#
- 2.Rd5#
- 1...Rd7
- 2.Sf3#
- 2.Bc3#
- 1...Rd8
- 2.Sf3#
- 2.Bc3#
- 1...Sh4
- 2.Bc3#
- 2.Rb4#
- 1...Se5
- 2.Bc3#
- 2.Re4#
- 1...Sb6
- 2.Sf3#
- 2.Bc3#
- 1...f3
- 2.Sxf3#
- 2.Bc3#
- 2.Rb4#
- 1...Qxe1+!
- threat
- 1.Rf3?
- threat
- 2.Bc3#
- 2.Rd3#
- 2.c3#
- 1...Rd5
- 2.Bc3#
- 2.Rxd5#
- 1...Qe3
- 2.Rb4#
- 1...Qe2
- 2.Bc3#
- 2.c3#
- 1...Qe4
- 2.Bc3#
- 2.Rb4#
- 2.Qxe4#
- 2.c3#
- 1...Qc7
- 2.Rd3#
- 2.Qe4#
- 1...Rc6
- 2.Rd3#
- 2.Rd5#
- 1...Se5
- 2.Bc3#
- 2.Rxf4#
- 2.c3#
- 1...Qe1+!
- threat
- 1.Rxf4+?
- 1...Qe4+
- 2.Sf3#
- 2.Rxe4#
- 2.Qxe4#
- 1...Sxf4!
- 1...Qe4+
- 1.Qc6?
- threat
- 2.Sf3#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Qe4+
- 2.Qxe4#
- 1...Qxg5
- 2.Qc4#
- 1...Rxc6
- 2.Rd5#
- 1...Rd5
- 2.Rxd5#
- 2.Qxd5#
- 2.Qc3#
- 1...Qe3
- 2.Qc4#
- 2.Qc5#
- 1...Qe2
- 2.Qc3#
- 2.Qc5#
- 1...Qe5
- 2.Sf3#
- 2.Rb4#
- 2.Qc3#
- 2.Qc4#
- 1...Qe6
- 2.Sf3#
- 2.Qc3#
- 2.Qc5#
- 1...Qc7
- 2.Sf3#
- 2.Qe4#
- 1...Qf7
- 2.Sf3#
- 2.Qe4#
- 2.Qc3#
- 2.Qc5#
- 1...Re6
- 2.Sf3#
- 2.Rd5#
- 2.Qd5#
- 2.Qc3#
- 2.Qc4#
- 1...Rf6
- 2.Sf3#
- 2.Rd5#
- 2.Qd5#
- 2.Qc3#
- 2.Qc4#
- 1...Rd7
- 2.Sf3#
- 2.Qc3#
- 2.Qc4#
- 1...Rd8
- 2.Sf3#
- 2.Qc3#
- 2.Qc4#
- 1...Sh4
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...Se5
- 2.Rxf4#
- 2.Qe4#
- 2.Qc3#
- 2.Qc5#
- 1...Sb6
- 2.Sf3#
- 2.Qc3#
- 2.Qc5#
- 1...f3
- 2.Sxf3#
- 2.Qc3#
- 2.Qc4#
- 2.Qc5#
- 1...b6
- 2.Sf3#
- 2.Qc3#
- 2.Qc4#
- 1...bxc6!
- threat
- 1.Qxg6?
- threat
- 2.Sf3#
- 2.Qd3#
- 2.c3#
- 1...Qe4+
- 2.Qxe4#
- 1...Qxg5
- 2.Qd3#
- 2.c3#
- 1...Rxg6
- 2.Rd5#
- 1...Rd5
- 2.Sf3#
- 2.Rxd5#
- 1...Qe2
- 2.c3#
- 1...Qc7
- 2.Sf3#
- 2.Rxf4#
- 2.Qd3#
- 2.Qe4#
- 1...Rc6
- 2.Sf3#
- 2.Rd5#
- 2.Qd3#
- 1...f3
- 2.Sxf3#
- 2.Qd3#
- 2.c3#
- 1...Qe3!
- threat
- 1.Qxe7?
- threat
- 2.Sf3#
- 2.Bc3#
- 2.Rb4#
- 2.Qe4#
- 1...Sgxe7
- 2.Rxf4#
- 1...Rb6
- 2.Sf3#
- 2.Bc3#
- 2.Rd5#
- 2.Qb4#
- 2.Qc5#
- 2.Qe4#
- 1...Rc6
- 2.Sf3#
- 2.Rd5#
- 2.Qe4#
- 1...Re6
- 2.Rd5#
- 2.Qb4#
- 2.Qc5#
- 1...Be5
- 2.Rb4#
- 1...Sh4
- 2.Bc3#
- 2.Rxf4#
- 2.Rb4#
- 2.Qe4#
- 1...Se5
- 2.Rxf4#
- 1...Sb6
- 2.Sf3#
- 2.Bc3#
- 2.Qe4#
- 1...f3
- 2.Sxf3#
- 2.Bc3#
- 2.Be3#
- 2.Rb4#
- 2.Qe3#
- 2.Qe4#
- 1...Scxe7!
- threat
- 1.Sb2?
- Keys
- 1.Bc1!
- threat
- 2.Rd1#
- 1...Qe4+
- 2.Qxe4#
- 1...Rd5
- 2.Rxd5#
- 1...Qe3
- 2.Rb4#
- 1...Qe1
- 2.Sf3#
- 1...Qe2
- 2.Bb2#
- 1...Se5
- 2.Rxf4#
- threat
- 1.Bc1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 7
- Sets
- Q(f);::B(E)
- Q(f);::R(G)
- Q(f);CHECK,OGATE::QAR1(I),XQ(f)
- R(c);N_GUARD::R1(G),XR(c)
- R(c);N_GUARD::R1(G)
- B(g);SBLOCK::R(G)
- S(d);N_GUARD,S_CUTQ(f)::R(A),XP(b)
- Tries
- Try
- S(F);
- Threat
- P(D)
- Vars
- Q(f);CHECK,OGATE::QAR1(I),XQ(f)
- R(c);N_GUARD::R1(G),XR(c)
- R(c);N_GUARD::R1(G)
- Refutation
- Q(f);
- Try
- B(E);CHECK
- Vars
- Q(f);XB(E)::R(G)
- P(b);SBLOCK,XB(E)::R(A)
- Refutation
- K(a);P_SPINQ(f),S_FLIGHT,XB(E)
- Try
- R(A);
- Threat
- DUALS(2)
- Vars
- Q(f);CHECK::R(A)+B(E),XQ(f)
- Q(f);CHECK,OGATE::QAR1(I),XQ(f)
- Refutation
- S(d);
- Try
- R(A);
- Threat
- DUALS(3)
- Vars
- Q(f);::R(G)
- Q(f);::B(E)
- Refutation
- Q(f);CHECK,XR(A)
- Try
- R(A);
- Threat
- DUALS(3)
- Vars
- Q(f);::R(G)
- Refutation
- Q(f);CHECK
- Try
- R(A);CHECK,XP(b)
- Refutation
- S(d);XR(A)
- Try
- Q(I);
- Threat
- DUALS(4)
- Vars
- Q(f);CHECK,N_GUARD::QAR1(I),XQ(f)
- Q(f);XS(H)::QAR1(I)
- R(c);N_GUARD,XQ(I)::R1(G)
- Refutation
- P(e);XQ(I)
- Try
- Q(I);XS(d)
- Threat
- DUALS(3)
- Vars
- Q(f);CHECK,N_GUARD::QAR1(I),XQ(f)
- R(c);N_GUARD,XQ(I)::R1(G)
- Q(f);::P(D)
- Refutation
- Q(f);
- Try
- Q(I);XQ(f)
- Threat
- DUALS(4)
- Vars
- S(d);N_GUARD,XQ(I)::R(A),XP(b)
- B(g);::R(G)
- S(d);N_GUARD::R(A),XP(b)
- Refutation
- S(h);XQ(I)
- Try
- Actual
- B(E);
- Threat
- R(A)
- Vars
- Q(f);CHECK,OGATE::QAR1(I),XQ(f)
- R(c);N_GUARD::R1(G),XR(c)
- Q(f);::R(G)
- Q(f);P_PINR(A)::S(H)
- Q(f);::B(E)
- S(d);N_GUARD,S_CUTQ(f)::R(A),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).