MESON Chess Problem Database
Problem Display
PID: 77990 (4n3/4N3/7p/q4p2/r1p1NR1K/1n2k1P1/1B2P3/3R1B2 w - - 0 1)
Onkoud, Abdelaziz
Probleemblad, 2007
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Sd5#
- 2.Sxf5#
- 1...Qd2
- 2.Sxf5#
- 1...Qc3
- 2.Sd5#
- 2.Sxf5#
- 1...Qb4
- 2.Sd5#
- 2.Sxf5#
- 1...Qb6
- 2.Sd5#
- 2.Sxf5#
- 1...Qc7
- 2.Sd5#
- 2.Sxf5#
- 1...Qd5
- 2.Sxd5#
- 1...Qa6
- 2.Sd5#
- 2.Sxf5#
- 1...Qa7
- 2.Sd5#
- 2.Sxf5#
- 1...Qa8
- 2.Sxf5#
- 1...Sa1
- 2.Bd4#
- 1...Sc1
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...Sc5
- 2.Sd5#
- 2.Sxf5#
- 2.Bd4#
- 1...c3
- 2.Rd3#
- 1...Qe1
- Tries
- 1.Sd2?
- threat
- 2.Rf3#
- 1...Qxd2
- 2.Sxf5#
- 1...Sxd2
- 2.Bd4#
- 1...Qc3
- 2.Sd5#
- 2.Sxf5#
- 1...Qd5
- 2.Sxd5#
- 1...Qa8
- 2.Sxf5#
- 1...Sd4
- 2.Bxd4#
- 1...c3!
- threat
- 1.Sc3?
- threat
- 2.Rf3#
- 1...Qxc3
- 2.Sd5#
- 2.Sxf5#
- 1...Qd5
- 2.Scxd5#
- 2.Sexd5#
- 1...Qa8
- 2.Sxf5#
- 1...Sd4
- 2.Bc1#
- 1...Sd2!
- threat
- 1.Sc5?
- threat
- 2.Sd5#
- 2.Sxf5#
- 2.Rf3#
- 1...Sxc5
- 2.Sd5#
- 2.Sxf5#
- 2.Bd4#
- 1...Qd2
- 2.Sxf5#
- 2.Rf3#
- 1...Qd8
- 2.Rf3#
- 1...Qa8
- 2.Sxf5#
- 1...Sd2
- 2.Sd5#
- 2.Sxf5#
- 2.Bd4#
- 1...Sd4
- 2.Sd5#
- 2.Bxd4#
- 1...Sd6
- 2.Sd5#
- 2.Rf3#
- 1...Sf6
- 2.Sxf5#
- 2.Rf3#
- 1...Sc7
- 2.Sxf5#
- 2.Rf3#
- 1...Sg7
- 2.Sd5#
- 2.Rf3#
- 1...c3
- 2.Sd5#
- 2.Sxf5#
- 2.Rd3#
- 1...Qxc5!
- threat
- 1.Sg5?
- threat
- 2.Rf3#
- 1...Qd5
- 2.Sxd5#
- 1...Qa8
- 2.Sxf5#
- 1...Sd2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...c3
- 2.Rd3#
- 1...hxg5+!
- threat
- 1.Sd6?
- threat
- 2.Rf3#
- 1...Qd5
- 2.Sxd5#
- 1...Qa8
- 2.Sdxf5#
- 2.Sexf5#
- 1...Sd2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...c3
- 2.Rd3#
- 1...Sxd6!
- threat
- 1.Sf6?
- threat
- 2.Rf3#
- 1...Qd5
- 2.Sfxd5#
- 2.Sexd5#
- 1...Qa8
- 2.Sxf5#
- 1...Sd2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...c3
- 2.Rd3#
- 1...Sxf6!
- threat
- 1.Sd2?
- Keys
- 1.Sf2!
- threat
- 2.Rf3#
- 1...Qd5
- 2.Sxd5#
- 1...Qa8
- 2.Sxf5#
- 1...Sd2
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...c3
- 2.Rd3#
- threat
- 1.Sf2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- Q(e);N_GUARD::S(I),XP(f)
- Q(e);N_GUARD::S(I),XQ(e)
- S(a);N_GUARD::B(C)
- S(a);N_GUARD::B(C),XS(a)
- P(d);N_GUARD::R1(A)
- Tries
- Try
- S(F);
- Threat
- R1(G)
- Vars
- Q(e);N_GUARD,XS(F)::S(I),XP(f)
- S(a);N_GUARD,XS(F)::B(C)
- Q(e);N_GUARD::S(I),XQ(e)
- Q(e);N_GUARD::S(I),XP(f)
- S(a);N_GUARD::B(C),XS(a)
- Refutation
- P(d);P_PINR(G)
- Try
- S(F);
- Threat
- R1(G)
- Vars
- Q(e);N_GUARD::S(I),XP(f)
- S(a);N_GUARD::B(C)
- Refutation
- S(a);
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- Q(e);P_PINS(I)::R1(G)
- Q(e);::S(I),XP(f)
- Refutation
- Q(e);XS(F)
- Try
- S(F);
- Threat
- R1(G)
- Vars
- Q(e);N_GUARD::S(I),XQ(e)
- Q(e);N_GUARD::S(I),XP(f)
- S(a);N_GUARD::B(C)
- S(a);N_GUARD::B(C),XS(a)
- P(d);N_GUARD,P_PINR(G)::R1(A)
- Refutation
- P(g);CHECK,XS(F)
- Try
- S(F);
- Threat
- R1(G)
- Vars
- Q(e);N_GUARD::S(I),XQ(e)
- S(a);N_GUARD::B(C)
- S(a);N_GUARD::B(C),XS(a)
- P(d);N_GUARD,P_PINR(G)::R1(A)
- Refutation
- S(h);XS(F)
- Try
- S(F);
- Threat
- R1(G)
- Vars
- Q(e);N_GUARD::S(I),XP(f)
- S(a);N_GUARD::B(C)
- S(a);N_GUARD::B(C),XS(a)
- P(d);N_GUARD,P_PINR(G)::R1(A)
- Refutation
- S(h);XS(F)
- Try
- Actual
- S(F);
- Threat
- R1(G)
- Vars
- Q(e);N_GUARD::S(I),XQ(e)
- Q(e);N_GUARD::S(I),XP(f)
- S(a);N_GUARD::B(C)
- S(a);N_GUARD::B(C),XS(a)
- P(d);N_GUARD,P_PINR(G)::R1(A)
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).