MESON Chess Problem Database
Problem Display
PID: 245072 (6n1/8/2p1K1N1/5P2/4k1N1/5r2/3Q2P1/8 w - - 0 1)
Ekstrom, Sven Johan Adrian
Schackvarlden, 1944
#2
6 + 4
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rf1
- 2.Qe3#
- 1...Rf2
- 2.Sxf2#
- 2.Qe3#
- 1...Ra3
- 2.Sf2#
- 1...Rb3
- 2.Sf2#
- 1...Rc3
- 2.Sf2#
- 1...Rd3
- 2.Qf4#
- 1...Re3
- 2.Sf2#
- 2.Qxe3#
- 1...Rg3
- 2.Sf2#
- 1...Rh3
- 2.Sf2#
- 1...Rf4
- 2.Qe3#
- 1...Rxf5
- 2.Qe3#
- 1...Sf6
- 2.Sxf6#
- 1...Sh6
- 2.Sf6#
- 1...Se7
- 2.Sf6#
- 1...c5
- 2.Qd5#
- 1...Rf1
- Tries
- 1.Sh4?
- threat
- 2.gxf3#
- 1...Rxf5
- 2.Qe3#
- 1...Re3
- 2.Qxe3#
- 1...Rf1
- 2.Qe3#
- 1...Rf2
- 2.Sxf2#
- 2.Qe3#
- 1...Ra3
- 2.Sf2#
- 1...Rb3
- 2.Sf2#
- 1...Rc3
- 2.Sf2#
- 1...Rg3
- 2.Sf2#
- 1...Rh3
- 2.Sf2#
- 1...Rf4
- 2.Qe3#
- 1...Rd3!
- threat
- 1.S6e5?
- threat
- 2.Qb4#
- 2.gxf3#
- 1...Rxf5
- 2.Qe3#
- 2.Qb4#
- 1...Re3
- 2.Qxe3#
- 2.Qb4#
- 1...Rf1
- 2.Qe3#
- 2.Qb4#
- 1...Rf2
- 2.Sxf2#
- 2.Qe3#
- 2.Qb4#
- 1...Ra3
- 2.Sf2#
- 2.Qb4#
- 1...Rb3
- 2.Sf2#
- 1...Rc3
- 2.Sf2#
- 1...Rg3
- 2.Sf2#
- 2.Qb4#
- 1...Rh3
- 2.Sf2#
- 2.Qb4#
- 1...Rf4
- 2.Qe3#
- 2.Qb4#
- 2.Qd3#
- 1...c5
- 2.gxf3#
- 1...Rd3!
- threat
- 1.Qc3?
- threat
- 2.Qc4#
- 2.gxf3#
- 1...Rxf5
- 2.Qe3#
- 2.Qc4#
- 1...Rf1
- 2.Qe3#
- 2.Qc4#
- 1...Rf2
- 2.Sxf2#
- 2.Qe3#
- 2.Qc4#
- 1...Rd3
- 2.Qe5#
- 1...Re3
- 2.Sf2#
- 2.Qxe3#
- 2.Qc4#
- 1...Rg3
- 2.Sf2#
- 2.Qc4#
- 1...Rh3
- 2.Sf2#
- 2.Qc4#
- 1...Rf4
- 2.Qe3#
- 2.Qc4#
- 1...Rxc3!
- threat
- 1.Qe2+?
- 1...Re3
- 2.Qc4#
- 2.Qxe3#
- 1...Kd4!
- 1...Re3
- 1.Sh4?
- Keys
- 1.S4e5!
- threat
- 2.gxf3#
- 1...Rxf5
- 2.Qd3#
- 1...Rd3
- 2.Qf4#
- 2.Qxd3#
- 1...Rf1
- 2.Qd3#
- 1...Rf2
- 2.Qd3#
- 1...Ra3
- 2.Qf4#
- 1...Rb3
- 2.Qf4#
- 1...Rc3
- 2.Qf4#
- 1...Re3
- 2.Qb4#
- 1...Rg3
- 2.Qf4#
- 1...Rh3
- 2.Qf4#
- 1...Rf4
- 2.Qxf4#
- 2.Qd3#
- threat
- 1.S4e5!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 7
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- R(a);N_GUARD::QAR1(A)
- R(a);N_GUARD::S(C)
- R(a);N_GUARD,SBLOCK::QAR1(A)
- R(a);N_GUARD,XP(D)::QAR1(A)
- S(d);N_GUARD::S(C),XS(d)
- S(d);N_GUARD::S(C)
- P(c);N_GUARD::QAB1(A)
- Tries
- Try
- S(F);
- Threat
- P(B),XR(a)
- Vars
- R(a);N_GUARD,XP(D)::QAR1(A)
- R(a);N_GUARD::QAR1(A),XR(a)
- R(a);N_GUARD::QAR1(A)
- R(a);N_GUARD::S(C)
- Refutation
- R(a);
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- R(a);N_GUARD::S(C)
- P(c);::P(B),XR(a)
- Refutation
- R(a);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(a);SBLOCK::QAR1(A)
- Refutation
- R(a);XQ(A)
- Try
- Q(A);CHECK
- Refutation
- K(b);P-FLIGHT
- Try
- Actual
- S(C);
- Threat
- P(B),XR(a)
- Vars
- R(a);N_GUARD,XP(D)::QAB1(A)
- R(a);N_GUARD::QAB1(A)
- R(a);N_GUARD::QAR1(A)
- R(a);SBLOCK::QAR(A)
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).