MESON Chess Problem Database
Problem Display
PID: 245123 (8/8/8/1Npnrn1N/2P1k1P1/1p2p2R/bK6/5Q2 w - - 0 1)
Hermanson, Halvar
Schackvarlden, 1931
#2
7 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Re6
- 2.Qxf5#
- 1...Re7
- 2.Qxf5#
- 1...Re8
- 2.Qxf5#
- 1...Bb1
- 2.Qxb1#
- 1...Sc3
- 2.Sf6#
- 1...Sb4
- 2.Sf6#
- 1...Sf4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sde7
- 2.Sf6#
- 1...Sg3
- 2.Sxg3#
- 1...Sd4
- 2.Sd6#
- 2.Sg3#
- 1...Sh4
- 2.Sg3#
- 1...Sd6
- 2.Sg3#
- 1...Sh6
- 2.Sg3#
- 1...Sfe7
- 2.Sg3#
- 1...Sg7
- 2.Sg3#
- 1...e2
- 2.Qg2#
- 2.Qh1#
- 2.Qf3#
- 1...Re6
- Tries
- 1.Ka1?
- 1...Re6
- 2.Qxf5#
- 1...Re7
- 2.Qxf5#
- 1...Re8
- 2.Qxf5#
- 1...Bb1
- 2.Qxb1#
- 1...Sc3
- 2.Sf6#
- 1...Sb4
- 2.Sf6#
- 1...Sf4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sde7
- 2.Sf6#
- 1...Sg3
- 2.Sxg3#
- 1...Sd4
- 2.Sd6#
- 2.Sg3#
- 1...Sh4
- 2.Sg3#
- 1...Sd6
- 2.Sg3#
- 1...Sh6
- 2.Sg3#
- 1...Sfe7
- 2.Sg3#
- 1...Sg7
- 2.Sg3#
- 1...e2
- 2.Qg2#
- 2.Qh1#
- 2.Qf3#
- 1...b2+!
- 1...Re6
- 1.Ka3?
- 1...Re6
- 2.Qxf5#
- 1...Re7
- 2.Qxf5#
- 1...Re8
- 2.Qxf5#
- 1...Bb1
- 2.Qxb1#
- 1...Sc3
- 2.Sf6#
- 1...Sb4
- 2.Sf6#
- 1...Sf4
- 2.Sf6#
- 1...Sb6
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sc7
- 2.Sf6#
- 1...Sde7
- 2.Sf6#
- 1...Sg3
- 2.Sxg3#
- 1...Sd4
- 2.Sd6#
- 2.Sg3#
- 1...Sh4
- 2.Sg3#
- 1...Sd6
- 2.Sg3#
- 1...Sh6
- 2.Sg3#
- 1...Sfe7
- 2.Sg3#
- 1...Sg7
- 2.Sg3#
- 1...e2
- 2.Qg2#
- 2.Qh1#
- 2.Qf3#
- 1...b2!
- 1...Re6
- 1.Sd6+?
- 1...Kd4
- 2.Qd1#
- 1...Sxd6!
- 1...Kd4
- 1.Rxe3+?
- 1...Sdxe3
- 2.Sf6#
- 1...Sfxe3
- 2.Sg3#
- 1...Kxe3!
- 1...Sdxe3
- 1.Ka1?
- Keys
- 1.Qd1!
- 1...Re6
- 2.Qxd5#
- 1...Re7
- 2.Qxd5#
- 1...Re8
- 2.Qxd5#
- 1...Bb1
- 2.Qxb1#
- 1...Sc3
- 2.Sxc3#
- 1...Sb4
- 2.Sc3#
- 1...Sf4
- 2.Sc3#
- 2.Sf6#
- 1...Sb6
- 2.Sc3#
- 1...Sf6
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...Sde7
- 2.Sc3#
- 1...Sg3
- 2.Sd6#
- 1...Sd4
- 2.Sd6#
- 1...Sh4
- 2.Sd6#
- 1...Sd6
- 2.Sxd6#
- 1...Sh6
- 2.Sd6#
- 1...Sfe7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...e2
- 2.Qh1#
- 2.Qd3#
- 1...Re6
- 1.Qd1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 15
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- R(g);N_GUARD::QAB1(A),XS(h)
- B(a);N_GUARD::QAB(A),XB(a)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- S(h);N_GUARD::S(G),XS(h)
- S(h);N_GUARD::S(G)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- R(g);N_GUARD::QAB1(A),XS(h)
- B(a);N_GUARD::QAB(A),XB(a)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- S(h);N_GUARD::S(G),XS(h)
- S(h);N_GUARD::S(G)
- Refutation
- P(b);CHECK
- Try
- K(B);S_FLIGHT
- Vars
- R(g);N_GUARD::QAB1(A),XS(h)
- B(a);N_GUARD::QAB(A),XB(a)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- S(h);N_GUARD::S(G),XS(h)
- S(h);N_GUARD::S(G)
- Refutation
- P(b);
- Try
- S(F);CHECK
- Vars
- K(d);P-FLIGHT::QAR(A)
- Refutation
- S(h);XS(F)
- Try
- R(C);CHECK,XP(c)
- Vars
- S(f);SBLOCK,XR(C)::S(G)
- S(h);SBLOCK,XR(C)::S(G)
- Refutation
- K(d);P-FLIGHT,XR(C)
- Try
- Actual
- Q(A);
- Vars
- R(g);N_GUARD::QAB1(A),XS(f)
- B(a);N_GUARD::QAB(A),XB(a)
- S(f);N_GUARD::S(F),XS(f)
- S(f);N_GUARD::S(F)
- S(h);N_GUARD::S(F)
- S(h);N_GUARD::S(F),XS(h)
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).