MESON Chess Problem Database
Problem Display
PID: 222548 (8/8/3NrRnK/1q3p2/2nP1k2/1r3NRP/5P1P/8 w - - 0 1)
Luukkonen, Emil
Suomen Shakki, 1946
#2
9 + 7
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qa4
- 2.Rxf5#
- 1...Qa6
- 2.Rxf5#
- 1...Qc6
- 2.Rxf5#
- 1...Qd7
- 2.Rxf5#
- 1...Qe8
- 2.Rxf5#
- 1...Qb4
- 2.Rxf5#
- 1...Qb6
- 2.Rxf5#
- 1...Qb7
- 2.Rxf5#
- 1...Qb8
- 2.Rxf5#
- 1...Rxf3
- 2.Rg4#
- 1...Sce5
- 2.Rxf5#
- 1...Qa4
- Tries
- 1.Se1?
- threat
- 2.Sg2#
- 2.Rg4#
- 1...Rxg3
- 2.hxg3#
- 1...Rxd6
- 2.Rg4#
- 1...Rxf6
- 2.Sg2#
- 1...Sxd6
- 2.Rg4#
- 1...Qc6
- 2.Rg4#
- 2.Rxf5#
- 1...Qd5
- 2.Rg4#
- 1...Qb7
- 2.Rg4#
- 2.Rxf5#
- 1...Se3
- 2.Rf3#
- 1...Sce5
- 2.Sg2#
- 2.Rxf5#
- 1...Sh4
- 2.Rg4#
- 1...Sge5
- 2.Sg2#
- 1...Rxe1!
- threat
- 1.Sh4?
- threat
- 2.Sg2#
- 2.Sxg6#
- 2.Rg4#
- 1...Rxg3
- 2.hxg3#
- 1...Rxd6
- 2.Rg4#
- 1...Rxf6
- 2.Sg2#
- 1...Sxd6
- 2.Rg4#
- 1...Qc6
- 2.Sxg6#
- 2.Rg4#
- 2.Rxf5#
- 1...Qe8
- 2.Sg2#
- 2.Rg4#
- 2.Rxf5#
- 1...Qd5
- 2.Sxg6#
- 2.Rg4#
- 1...Qb7
- 2.Sxg6#
- 2.Rg4#
- 2.Rxf5#
- 1...Se3
- 2.Sxg6#
- 2.Rf3#
- 1...Sce5
- 2.Sg2#
- 2.Rxf5#
- 1...Sge5
- 2.Sg2#
- 1...Se7
- 2.Sg2#
- 2.Rg4#
- 1...Sf8
- 2.Sg2#
- 2.Rg4#
- 1...Sh8
- 2.Sg2#
- 2.Rg4#
- 1...Sxh4!
- threat
- 1.Sg5?
- threat
- 2.Sxe6#
- 2.Rg4#
- 1...Rxg3
- 2.hxg3#
- 1...Rxd6
- 2.Rg4#
- 1...Sxd6
- 2.Rg4#
- 1...Qd7
- 2.Rg4#
- 2.Rxf5#
- 1...Qe8
- 2.Rg4#
- 2.Rxf5#
- 1...Qd5
- 2.Rg4#
- 1...Qe5
- 2.Rg4#
- 1...Rbe3
- 2.Rg4#
- 1...Re1
- 2.Rg4#
- 1...Re2
- 2.Rg4#
- 1...Ree3
- 2.Rg4#
- 1...Re4
- 2.Rg4#
- 1...Re5
- 2.Rg4#
- 1...Re7
- 2.Rg4#
- 1...Re8
- 2.Rg4#
- 1...Se3
- 2.Sxe6#
- 2.Rf3#
- 1...Sce5
- 2.Sxe6#
- 2.Rxf5#
- 1...Sge5
- 2.Sxe6#
- 1...Sf8
- 2.Rg4#
- 1...Rxf6!
- threat
- 1.Se1?
- Keys
- 1.Sg1!
- threat
- 2.Rg4#
- 1...Rxg3
- 2.hxg3#
- 1...Rxf6
- 2.Se2#
- 1...Se3
- 2.Rf3#
- 1...Sce5
- 2.Rxf5#
- 1...Sge5
- 2.Se2#
- threat
- 1.Sg1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 10
- Sets
- Q(d);N_GUARD::R1(H),XP(e)
- R(a);SBLOCK,XS(C)::R1(D)
- S(b);S_CUTQ(d)::R1(H),XP(e)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(a);OGATE,XR(D)::P(B),XR(a)
- R(f);XS(G)::R1(D)
- R(f);N_SPINP(e),XR(H)::S(C)
- S(b);XS(G)::R1(D)
- Q(d);::R1(D)
- S(b);S_CUTR(a)::R1(D)
- S(g);P_PINR(H)::R1(D)
- S(g);P_PINR(H)::S(C)
- Refutation
- R(f);XS(C)
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- R(a);OGATE,XR(D)::P(B),XR(a)
- R(f);XS(G)::R1(D)
- R(f);N_SPINP(e),XR(H)::S(C)
- S(b);XS(G)::R1(D)
- S(g);P_PINR(H)::S(C)
- Refutation
- S(g);P_PINR(H),XS(C)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(a);OGATE,XR(D)::P(B),XR(a)
- R(f);XS(G)::R1(D)
- S(b);XS(G)::R1(D)
- Q(d);::R1(D)
- R(a);::R1(D)
- R(f);::R1(D)
- S(g);P_PINR(H)::S(C),XR(f)
- S(g);P_PINR(H)::R1(D)
- Refutation
- R(f);N_SPINP(e),XR(H)
- Try
- Actual
- S(C);
- Threat
- R1(D)
- Vars
- R(a);OGATE,XR(D)::P(B),XR(a)
- R(f);N_GUARD,N_SPINP(e),XR(H)::S(C)
- S(b);S_CUTR(a)::R1(D)
- S(b);S_CUTQ(d)::R1(H),XP(e)
- S(g);P_PINR(H),S_CUTR(f)::S(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).