MESON Chess Problem Database
Problem Display
PID: 230819 (8/p2p2p1/p2P2P1/B1PR2P1/4N1p1/3Pk1P1/1n1N2Qn/6bK w - - 0 1)
Andersson, Sven Tore
Stella Polaris, 1968
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Bf2
- 2.Qxf2#
- 1...Sd1
- 2.Sc4#
- 1...Sxd3
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf1
- 2.Sxf1#
- 1...Sf3
- 2.Sf1#
- 1...Bf2
- Tries
- 1.Kxg1?
- threat
- 2.Qf2#
- 1...Sxd3
- 2.Sc4#
- 1...Sd1
- 2.Sc4#
- 1...Sf3+!
- threat
- 1.Sf6?
- 1...Sxd3
- 2.Sc4#
- 1...Bf2
- 2.Qe4#
- 1...Sc4
- 2.Sxc4#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sf1
- 2.Sxf1#
- 2.Sxg4#
- 1...Sf3
- 2.Sf1#
- 2.Sxg4#
- 1...gxf6!
- 1...Sxd3
- 1.Bc3?
- 1...Sxd3
- 2.Sc4#
- 2.Bd4#
- 1...Bf2
- 2.Qxf2#
- 1...Sc4
- 2.Sxc4#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sf1
- 2.Sxf1#
- 1...Sf3
- 2.Sf1#
- 1...a5!
- 1...Sxd3
- 1.Bb4?
- 1...Sxd3
- 2.Sc4#
- 1...Bf2
- 2.Qxf2#
- 1...Sc4
- 2.Sxc4#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sf1
- 2.Sxf1#
- 1...Sf3
- 2.Sf1#
- 1...a5!
- 1...Sxd3
- 1.Bc7?
- 1...Sxd3
- 2.Sc4#
- 1...Bf2
- 2.Qxf2#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf1
- 2.Sxf1#
- 1...Sf3
- 2.Sf1#
- 1...a5!
- 1...Sxd3
- 1.Bd8?
- 1...Sxd3
- 2.Sc4#
- 1...Bf2
- 2.Qxf2#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf1
- 2.Sxf1#
- 1...Sf3
- 2.Sf1#
- 1...a5!
- 1...Sxd3
- 1.c6?
- 1...Sxd3
- 2.Sc4#
- 1...Bf2
- 2.Qxf2#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf1
- 2.Sxf1#
- 1...Sf3
- 2.Sf1#
- 1...dxc6!
- 1...Sxd3
- 1.Kxg1?
- Keys
- 1.Sf2!
- 1...Ke2
- 2.Re5#
- 1...Bxf2
- 2.Qe4#
- 1...Sxd3
- 2.Sd1#
- 1...Sc4
- 2.Sd1#
- 1...Sd1
- 2.Sxd1#
- 1...Sa4
- 2.Sd1#
- 1...Sf1
- 2.Sxg4#
- 1...Sf3
- 2.Sxg4#
- 1...Ke2
- 1.Sf2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(a);N_GUARD::QAB1(C),XB(a)
- S(b);N_GUARD::S(B)
- S(b);N_GUARD,XP(D)::S(B)
- S(b);N_GUARD::S(B),XS(b)
- S(c);N_GUARD::S(B),XS(c)
- S(c);N_GUARD::S(B)
- Tries
- Try
- K(A);P-FLIGHT,XB(a)
- Threat
- QAB1(C)
- Vars
- S(b);N_GUARD,XP(D)::S(B)
- S(b);N_GUARD::S(B)
- Refutation
- S(c);CHECK
- Try
- S(F);
- Vars
- S(b);N_GUARD,XP(D)::S(B)
- B(a);SBLOCK::QAR1(C)
- S(b);N_GUARD::S(B),XS(b)
- S(b);N_GUARD::S(B)
- Refutation
- P(i);XS(F)
- Try
- B(G);
- Vars
- B(a);N_GUARD::QAB1(C),XB(a)
- S(b);N_GUARD::S(B),XS(b)
- S(b);N_GUARD::S(B)
- S(c);N_GUARD::S(B),XS(c)
- S(c);N_GUARD::S(B)
- Refutation
- P(f);
- Try
- B(G);
- Vars
- S(b);N_GUARD,XP(D)::S(B)
- B(a);N_GUARD::QAB1(C),XB(a)
- S(b);N_GUARD::S(B),XS(b)
- S(b);N_GUARD::S(B)
- S(c);N_GUARD::S(B),XS(c)
- S(c);N_GUARD::S(B)
- Refutation
- P(f);
- Try
- B(G);
- Vars
- S(b);N_GUARD,XP(D)::S(B)
- B(a);N_GUARD::QAB1(C),XB(a)
- S(b);N_GUARD::S(B)
- S(b);N_GUARD::S(B),XS(b)
- S(c);N_GUARD::S(B),XS(c)
- S(c);N_GUARD::S(B)
- Refutation
- P(f);
- Try
- B(G);
- Vars
- S(b);N_GUARD,XP(D)::S(B)
- B(a);N_GUARD::QAB1(C),XB(a)
- S(b);N_GUARD::S(B)
- S(b);N_GUARD::S(B),XS(b)
- S(c);N_GUARD::S(B),XS(c)
- S(c);N_GUARD::S(B)
- Refutation
- P(f);
- Try
- P(H);
- Vars
- S(b);N_GUARD,XP(D)::S(B)
- B(a);N_GUARD::QAB1(C),XB(a)
- S(b);N_GUARD::S(B)
- S(b);N_GUARD::S(B),XS(b)
- S(c);N_GUARD::S(B),XS(c)
- S(c);N_GUARD::S(B)
- Refutation
- P(h);XP(H)
- Try
- Actual
- S(F);
- Vars
- K(d);P-FLIGHT::R(I)
- B(a);SBLOCK,XS(F)::QAR1(C)
- S(b);N_GUARD,XP(D)::S(F)
- S(b);N_GUARD::S(F)
- S(b);N_GUARD::S(F),XS(b)
- S(c);N_GUARD::S(F),XP(e)
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).