MESON Chess Problem Database
Problem Display
PID: 159207 (KB1R1r2/3P2Rb/Q7/2Pkn3/1P2n3/2p4q/2N1N3/7B w - - 0 1)
Ahs, Carl Johan Mathias
Skakbladet, 1934
#2
11 + 7
| 15148 | Sadier Collection | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Se3#
- 2.Sxc3#
- 1...Qg2
- 2.Se3#
- 1...Qg4
- 2.Se3#
- 2.Sxc3#
- 1...Qf5
- 2.Se3#
- 2.Sxc3#
- 1...Qe6
- 2.Se3#
- 2.Sxc3#
- 1...Qxd7
- 2.Se3#
- 2.Sxc3#
- 1...Qxh1
- 2.Se3#
- 1...Qh2
- 2.Se3#
- 2.Sxc3#
- 1...Qe3
- 2.Sxe3#
- 1...Qh4
- 2.Se3#
- 2.Sxc3#
- 1...Qh5
- 2.Se3#
- 2.Sxc3#
- 1...Qh6
- 2.Sxc3#
- 1...Rf4
- 2.Sxf4#
- 1...Rxd8
- 2.Sf4#
- 1...Re8
- 2.Sf4#
- 1...Rg8
- 2.Sf4#
- 1...Rh8
- 2.Sf4#
- 1...Bf5
- 2.Sf4#
- 1...Sd3
- 2.Sxc3#
- 1...Sf3
- 2.Se3#
- 1...Sc6
- 2.Qa2#
- 1...Sf7
- 2.Sf4#
- 1...Qf1
- Tries
- 1.Re8?
- threat
- 2.Rxe5#
- 1...Rxe8
- 2.Sf4#
- 1...Qf5
- 2.Se3#
- 2.Sxc3#
- 1...Qe6
- 2.Se3#
- 2.Sxc3#
- 2.Qxe6#
- 1...Qh2
- 2.Se3#
- 2.Sxc3#
- 2.Qe6#
- 1...Qg3
- 2.Qe6#
- 1...Qh5
- 2.Se3#
- 2.Sxc3#
- 2.Qe6#
- 1...Rf5
- 2.Qe6#
- 1...Sd3
- 2.Sxc3#
- 1...Sf3
- 2.Se3#
- 1...Sc4
- 2.Qb7#
- 1...Sg4
- 2.Qe6#
- 2.d8Q#
- 2.d8R#
- 1...Sc6
- 2.Qa2#
- 1...Sg6
- 2.Bxe4#
- 1...Sf7
- 2.Sf4#
- 1...Sxd7!
- threat
- 1.Qa2+?
- 1...Kc6
- 2.Scd4#
- 2.Sed4#
- 1...Sc4!
- 1...Kc6
- 1.Re8?
- Keys
- 1.Re7!
- threat
- 2.Rxe5#
- 1...Sxd7
- 2.Re5#
- 1...Qf5
- 2.Se3#
- 2.Sxc3#
- 1...Qe6
- 2.Se3#
- 2.Sxc3#
- 2.Qxe6#
- 1...Qh2
- 2.Se3#
- 2.Sxc3#
- 2.Qe6#
- 1...Qg3
- 2.Qe6#
- 1...Qh5
- 2.Se3#
- 2.Sxc3#
- 2.Qe6#
- 1...Rf5
- 2.Qe6#
- 1...Re8
- 2.Sf4#
- 1...Sd3
- 2.Sxc3#
- 1...Sf3
- 2.Se3#
- 1...Sc4
- 2.Qb7#
- 1...Sg4
- 2.Qe6#
- 1...Sc6
- 2.Qa2#
- 1...Sg6
- 2.Bxe4#
- 1...Sf7
- 2.Sf4#
- threat
- 1.Re7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 9
- Sets
- Q(b);N_GUARD,N_SPINS(c)::S(B)
- Q(b);N_GUARD,N_SPINS(c),XB(A)::S(B)
- Q(b);N_GUARD::S(B),XQ(b)
- Q(b);N_GUARD::S(C),XP(a)
- R(g);N_GUARD::S(C),XR(g)
- R(g);N_GUARD,P_PINB(J),XR(K)::S(C)
- R(g);N_GUARD::S(C)
- B(f);S_CUTR(g)::S(C)
- S(e);S_CUTQ(b)::S(C),XP(a)
- S(e);N_SPINS(c),S_CUTQ(b)::S(B)
- S(e);N_GUARD,SBLOCK::QAB(F)
- S(e);S_CUTR(g)::S(C)
- Tries
- Try
- R(K);
- Threat
- R1(K),XS(e)
- Vars
- R(g);N_GUARD,P_PINB(J),XR(K)::S(C)
- Q(b);N_GUARD::QAB1(F)
- R(g);S_CUTQ(b)::QAB1(F)
- S(e);S_CUTQ(b)::S(C),XP(a)
- S(e);N_SPINS(c),S_CUTQ(b)::S(B)
- S(e);N_GUARD,SBLOCK::QAB(F)
- S(e);S_CUTB(f)::B(A),XS(c)
- S(e);S_CUTR(g)::S(C)
- Refutation
- S(e);XP(G)
- Try
- Q(F);CHECK
- Refutation
- S(e);N_SPINS(c),P_SPINS(e)
- Try
- Actual
- R(H);
- Threat
- R1(H),XS(e)
- Vars
- S(e);XP(G)::R1(H)
- Q(b);N_GUARD::QAB1(F)
- R(g);S_CUTQ(b)::QAB1(F)
- R(g);N_GUARD::S(C)
- S(e);S_CUTQ(b)::S(C),XP(a)
- S(e);N_SPINS(c),S_CUTQ(b)::S(B)
- S(e);N_GUARD,SBLOCK::QAB(F)
- S(e);S_CUTQ(b)::QAB1(F)
- S(e);S_CUTB(f)::B(A),XS(c)
- S(e);S_CUTR(g)::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).