MESON Chess Problem Database
Problem Display
PID: 222358 (3Nr3/b1p1rP2/7R/1P1k4/1Q1nn1N1/5P2/6K1/4R1B1 w - - 0 1)
Jonsson, Nils Gustav Helmer
Suomen Shakki, 1944
#2
10 + 7
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Re5
- 2.Se3#
- 1...Bb8
- 2.Qxd4#
- 1...Sc2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sxf3
- 2.Qb3#
- 1...Sxb5
- 2.Qb3#
- 1...Sf5
- 2.Qb3#
- 1...Sc6
- 2.Qb3#
- 1...Se6
- 2.fxe4#
- 1...Sd2
- 2.Sf6#
- 1...Sf2
- 2.Sf6#
- 1...Sc3
- 2.Sf6#
- 1...Sg3
- 2.Sf6#
- 1...Sc5
- 2.Qxd4#
- 1...Sg5
- 2.Sf6#
- 1...Sd6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Re5
- Tries
- 1.Se6?
- threat
- 2.Sf4#
- 2.fxe4#
- 1...Rxf7
- 2.fxe4#
- 1...Sxf3
- 2.Sf4#
- 1...Sxb5
- 2.Sf4#
- 1...Sxe6
- 2.fxe4#
- 1...Bc5
- 2.Sf4#
- 1...Sc5
- 2.Sf4#
- 2.Qxd4#
- 1...c5
- 2.Sf4#
- 1...Se2
- 2.fxe4#
- 1...Sd2
- 2.Sf6#
- 2.Sf4#
- 2.Re5#
- 1...Sf2
- 2.Sf6#
- 2.Sf4#
- 2.Re5#
- 1...Sc3
- 2.Sf6#
- 2.Sf4#
- 2.Re5#
- 1...Sg3
- 2.Sf6#
- 2.Sf4#
- 2.Re5#
- 1...Sg5
- 2.Sf6#
- 2.Sf4#
- 2.Re5#
- 1...Sd6
- 2.Sf6#
- 2.Sf4#
- 2.Re5#
- 1...Sf6
- 2.Sxf6#
- 2.Sf4#
- 2.Re5#
- 1...Rxe6!
- threat
- 1.Rh5+?
- 1...Re5
- 2.Se3#
- 2.fxe4#
- 1...Sg5
- 2.Sf6#
- 1...Sf5!
- 1...Re5
- 1.Rd6+?
- 1...Sxd6
- 2.Sf6#
- 1...cxd6!
- 1...Sxd6
- 1.Qb3+?
- 1...Kc5
- 2.Sb7#
- 2.Rc6#
- 1...Sxb3!
- 1...Kc5
- 1.Se6?
- Keys
- 1.Sc6!
- threat
- 2.Se3#
- 1...Sxf3
- 2.Qb3#
- 1...Sxb5
- 2.Qb3#
- 1...Sxc6
- 2.Qb3#
- 1...Rg8
- 2.Sxe7#
- 1...Sc2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sf5
- 2.Qb3#
- 1...Se6
- 2.fxe4#
- 1...Sd2
- 2.Sf6#
- 1...Sf2
- 2.Sf6#
- 1...Sc3
- 2.Sf6#
- 1...Sg3
- 2.Sf6#
- 1...Sc5
- 2.Qxd4#
- 1...Sg5
- 2.Sf6#
- 1...Sd6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- threat
- 1.Sc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- R(f);SBLOCK::S(F)
- B(d);N_GUARD::QAR1(E),XS(a)
- S(a);N_GUARD::QAB(E)
- S(a);N_GUARD::QAB(E),XS(a)
- S(a);N_GUARD,XP(D)::QAB(E)
- S(a);N_GUARD,XP(G)::QAB(E)
- S(a);S_CUTR(f)::P(D),XS(b)
- S(b);N_GUARD::S(F)
- S(b);S_CUTB(d)::QAR1(E),XS(a)
- S(b);N_GUARD::S(F),XS(b)
- Tries
- Try
- S(J);
- Threat
- DUALS(2)
- Vars
- R(f);XP(I)::P(D),XS(b)
- S(a);XP(D)::S(J)
- S(a);XP(G)::S(J)
- S(a);XS(J)::P(D),XS(b)
- B(d);::S(J)
- P(e);::S(J)
- S(a);::P(D),XS(b)
- Refutation
- R(f);XS(J)
- Try
- R(H);CHECK
- Vars
- S(b);P_SPINS(b)::S(F)
- Refutation
- S(a);P_SPINS(a)
- Try
- R(H);CHECK
- Vars
- S(b);XR(H)::S(F)
- Refutation
- P(e);XR(H)
- Try
- Q(E);CHECK
- Refutation
- S(a);XQ(E)
- Try
- Actual
- S(J);
- Threat
- S(F)
- Vars
- S(a);N_GUARD,XP(D)::QAB(E)
- S(a);N_GUARD,XP(G)::QAB(E)
- S(a);N_GUARD,XS(J)::QAB(E)
- R(g);N_GUARD,P_PINS(F)::S(J),XR(f)
- S(a);N_GUARD::QAB(E)
- S(a);N_GUARD::QAB(E),XS(a)
- S(a);S_CUTR(f)::P(D),XS(b)
- S(b);N_GUARD::S(F)
- S(b);S_CUTB(d)::QAR1(E),XS(a)
- S(b);N_GUARD::S(F),XS(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).