MESON Chess Problem Database
Problem Display
PID: 160543 (2nK1n2/4p2R/2p1kN2/B1PR1pQ1/N2br3/1B3q2/1p3p2/3r4 w - - 0 1)
Ahs, Carl Johan Mathias
Norsk Sjakkblad, 1935
#2
9 + 12
| 15148 | Sadier Collection | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Rxf5#
- 2.Qxf5#
- 1...Qe2
- 2.Qxf5#
- 1...Qg2
- 2.Rxf5#
- 2.Qxf5#
- 1...Qg4
- 2.Rxf5#
- 1...Qh5
- 2.Rxf5#
- 1...Qxb3
- 2.Qxf5#
- 1...Qc3
- 2.Qxf5#
- 1...Qd3
- 2.Qxf5#
- 1...Qe3
- 2.Qxf5#
- 1...Qg3
- 2.Qxf5#
- 1...Qf4
- 2.Rxf5#
- 1...Re5
- 2.Rd6#
- 1...Bxc5
- 2.Sxc5#
- 1...Be5
- 2.Rd6#
- 1...Bxf6
- 2.Qg8#
- 1...Sb6
- 2.Rxe7#
- 1...Sd6
- 2.Rxe7#
- 1...Sa7
- 2.Rxe7#
- 1...f4
- 2.Re5#
- 2.Rd6#
- 2.Qf5#
- 1...exf6
- 2.Qg8#
- 1...Qh1
- Tries
- 1.Sg4?
- threat
- 2.Re5#
- 2.Rd6#
- 2.Qg8#
- 1...Qxg4
- 2.Rxf5#
- 1...Qxb3
- 2.Qxf5#
- 2.Qg8#
- 1...Bxc5
- 2.Sxc5#
- 2.Qg8#
- 1...fxg4
- 2.Re5#
- 2.Rd6#
- 1...cxd5
- 2.Qg8#
- 1...Bg7
- 2.Rd6#
- 1...Re5
- 2.Rxe5#
- 2.Rd6#
- 2.Qg8#
- 1...Bc3
- 2.Rd4#
- 2.Rd6#
- 2.Qg8#
- 1...Be3
- 2.Rd4#
- 2.Rd6#
- 2.Qg8#
- 1...Be5
- 2.Rd6#
- 2.Qg8#
- 1...Bf6
- 2.Rd6#
- 2.Qg8#
- 1...Bh8
- 2.Rd6#
- 2.Qg8#
- 1...Sd6
- 2.Re5#
- 2.Rxd6#
- 2.Rxe7#
- 2.Qxe7#
- 1...Sg6
- 2.Re5#
- 2.Rd6#
- 1...Rxg4!
- threat
- 1.Sd7?
- threat
- 2.Sxf8#
- 2.Re5#
- 2.Rd6#
- 2.Qg8#
- 1...Qxb3
- 2.Qxf5#
- 2.Qg8#
- 1...Bxc5
- 2.Saxc5#
- 2.Sdxc5#
- 2.Sxf8#
- 2.Qg8#
- 1...Sxh7
- 2.Re5#
- 2.Rd6#
- 2.Qg8#
- 1...cxd5
- 2.Qg8#
- 1...Bg7
- 2.Re5#
- 2.Rd6#
- 1...Qg2
- 2.Sxf8#
- 2.Rxd4#
- 2.Re5#
- 2.Rxf5#
- 2.Rd6#
- 2.Qxf5#
- 1...Qg4
- 2.Sxf8#
- 2.Rxd4#
- 2.Re5#
- 2.Rxf5#
- 2.Rd6#
- 1...Qh5
- 2.Sxf8#
- 2.Rxd4#
- 2.Re5#
- 2.Rxf5#
- 2.Rd6#
- 1...Qg3
- 2.Sxf8#
- 2.Re5#
- 2.Rd6#
- 2.Qxf5#
- 1...Rg1
- 2.Sxf8#
- 2.Re5#
- 2.Rd6#
- 1...Rg4
- 2.Sxf8#
- 2.Re5#
- 2.Rd6#
- 1...Re5
- 2.Sxf8#
- 2.Rxe5#
- 2.Rd6#
- 2.Qg8#
- 1...Be5
- 2.Sxf8#
- 2.Rxe5#
- 2.Rd6#
- 2.Qg8#
- 1...Sd6
- 2.Sxf8#
- 2.Re5#
- 2.Rxd6#
- 2.Rxe7#
- 2.Qxe7#
- 1...Sg6
- 2.Re5#
- 2.Rd6#
- 1...Sxd7!
- threat
- 1.Sg4?
- Keys
- 1.Bc7!
- threat
- 2.Re5#
- 1...Qxb3
- 2.Qxf5#
- 1...Bxc5
- 2.Sxc5#
- 1...Bxf6
- 2.Qg8#
- 1...cxd5
- 2.Bxd5#
- 1...Re5
- 2.Rxe5#
- 2.Rd6#
- 1...Bc3
- 2.Rd4#
- 1...Be3
- 2.Rd4#
- 1...Be5
- 2.Rd6#
- 1...Sd6
- 2.Rxe7#
- threat
- 1.Bc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 12
- Sets
- Q(d);N_GUARD::QAB1(F),XP(g)
- Q(d);N_GUARD::B(A)+R(E),XP(g)
- Q(d);N_GUARD,XB(A)::QAB1(F),XP(g)
- R(f);SBLOCK::B(A)+R(E),DCHECK
- B(e);P_PINR(E),XP(D)::S(B),XB(e)
- B(e);P_PINR(E),SBLOCK::B(A)+R(E),DCHECK
- B(e);P_PINR(E),SBLOCK,XS(G)::QAB(F)
- S(k);N_GUARD::R1(H),XP(j)
- P(j);SBLOCK,XS(G)::QAB(F)
- Tries
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- Q(d);N_GUARD,XS(G)::B(A)+R(E),XP(g)
- P(h);P_SPINP(h),XR(E)::QAB(F)
- B(e);P_PINR(E)::B(A)+R(E),DCHECK
- Refutation
- R(f);XS(G)
- Try
- S(G);
- Threat
- DUALS(4)
- Vars
- P(h);P_SPINP(h),XR(E)::QAB(F)
- Refutation
- S(l);XS(G)
- Try
- Actual
- B(C);
- Threat
- B(A)+R(E),DCHECK
- Vars
- Q(d);N_GUARD,XB(A)::QAB1(F),XP(g)
- B(e);P_PINR(E),XP(D)::S(B),XB(e)
- B(e);P_PINR(E),SBLOCK,XS(G)::QAB(F)
- P(h);OGATE,P_SPINP(h),XR(E)::B(A),XP(h)
- B(e);P_PINR(E),S_CUTQ(d)::B(A)+R(E)
- B(e);P_PINR(E),SBLOCK::B(A)+R(E),DCHECK
- S(k);N_GUARD::R1(H),XP(j)
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).