MESON Chess Problem Database
Problem Display
PID: 7069 (3B4/b3p3/K1pnBp2/P1k1p3/p3p1Q1/3PP3/N2N4/8 w - - 0 1)
Onkoud, Abdelaziz
3rd Comm., Freie Presse, 1998
#2
9 + 9
| 14503 | Problemschach-Jahrbuch (1999) | 2000 |
SOLUTION
- SOUND
- Sets
- 1...Bb6
- 2.Bxb6#
- 1...Bb8
- 2.Bb6#
- 1...Sc4
- 2.Sxe4#
- 1...Sb5
- 2.Sxe4#
- 1...Sf5
- 2.Sxe4#
- 1...Sb7
- 2.Sxe4#
- 1...Sf7
- 2.Sxe4#
- 1...Sc8
- 2.Sxe4#
- 1...Se8
- 2.Sxe4#
- 1...a3
- 2.Sb3#
- 1...exd3
- 2.Qb4#
- 1...Bb6
- Tries
- 1.Bc7?
- 1...exd3
- 2.Qb4#
- 1...Bb6
- 2.Bxb6#
- 1...Bb8
- 2.Bb6#
- 1...Sc4
- 2.Sxe4#
- 1...Sb5
- 2.Sxe4#
- 1...Sf5
- 2.Sxe4#
- 1...Sb7
- 2.Sxe4#
- 1...Sf7
- 2.Sxe4#
- 1...Sc8
- 2.Sxe4#
- 1...Se8
- 2.Sxe4#
- 1...a3
- 2.Sb3#
- 1...f5!
- 1...exd3
- 1.Bxe7?
- threat
- 2.Sxe4#
- 1...exd3
- 2.Se4#
- 2.Qb4#
- 2.Qc4#
- 1...f5!
- threat
- 1.Qf5?
- threat
- 2.d4#
- 1...Sxf5
- 2.Sxe4#
- 1...Sc4
- 2.Sxe4#
- 1...Sb5
- 2.Sxe4#
- 1...Sb7
- 2.Sxe4#
- 1...Sf7
- 2.Sxe4#
- 1...Sc8
- 2.Sxe4#
- 1...Se8
- 2.Sxe4#
- 1...exd3!
- threat
- 1.Qg1?
- 1...exd3
- 2.e4#
- 1...Sc4
- 2.Sxe4#
- 1...Sb5
- 2.Sxe4#
- 1...Sf5
- 2.Sxe4#
- 1...Sb7
- 2.Sxe4#
- 1...Sf7
- 2.Sxe4#
- 1...Sc8
- 2.Sxe4#
- 1...Se8
- 2.Sxe4#
- 1...Bb6
- 2.Bxb6#
- 1...Bb8
- 2.Bb6#
- 1...a3
- 2.Sb3#
- 1...f5!
- 1...exd3
- 1.Qg3?
- 1...Sc4
- 2.Sxe4#
- 1...Sb5
- 2.Sxe4#
- 1...Sf5
- 2.Sxe4#
- 1...Sb7
- 2.Sxe4#
- 1...Sf7
- 2.Sxe4#
- 1...Sc8
- 2.Sxe4#
- 1...Se8
- 2.Sxe4#
- 1...f5
- 2.Qxe5#
- 1...Bb6
- 2.Bxb6#
- 1...Bb8
- 2.Bb6#
- 1...a3
- 2.Sb3#
- 1...exd3!
- 1...Sc4
- 1.Qxe4?
- threat
- 2.Qb4#
- 1...Sxe4
- 2.Sxe4#
- 1...Sc4!
- threat
- 1.Qh4?
- 1...exd3
- 2.Qb4#
- 1...Sc4
- 2.Sxe4#
- 1...Sb5
- 2.Sxe4#
- 1...Sf5
- 2.Sxe4#
- 1...Sb7
- 2.Sxe4#
- 1...Sf7
- 2.Sxe4#
- 1...Sc8
- 2.Sxe4#
- 1...Se8
- 2.Sxe4#
- 1...Bb6
- 2.Bxb6#
- 1...Bb8
- 2.Bb6#
- 1...a3
- 2.Sb3#
- 1...f5!
- 1...exd3
- 1.Qg7?
- 1...Sc4
- 2.Sxe4#
- 1...Sb5
- 2.Sxe4#
- 1...Sf5
- 2.Sxe4#
- 1...Sb7
- 2.Sxe4#
- 1...Sf7
- 2.Sxe4#
- 1...Sc8
- 2.Sxe4#
- 1...Se8
- 2.Sxe4#
- 1...f5
- 2.Qxe5#
- 1...Bb6
- 2.Bxb6#
- 1...Bb8
- 2.Bb6#
- 1...a3
- 2.Sb3#
- 1...exd3!
- 1...Sc4
- 1.Bc7?
- Keys
- 1.Qf4!
- 1...exd3
- 2.Qb4#
- 1...exf4
- 2.d4#
- 1...Sc4
- 2.Sxe4#
- 1...Sb5
- 2.Sxe4#
- 1...Sf5
- 2.Sxe4#
- 1...Sb7
- 2.Sxe4#
- 1...Sf7
- 2.Sxe4#
- 1...Sc8
- 2.Sxe4#
- 1...Se8
- 2.Sxe4#
- 1...f5
- 2.Qxe5#
- 1...Bb6
- 2.Bxb6#
- 1...Bb8
- 2.Bb6#
- 1...a3
- 2.Sb3#
- 1...exd3
- 1.Qf4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(h);N_GUARD::B(I),XB(h)
- B(h);N_GUARD::B(I)
- S(f);N_GUARD::S(B),XP(b)
- P(a);N_GUARD::S(B)
- P(b);OGATE,XP(C)::QAB1(E)
- Tries
- Try
- B(I);
- Vars
- P(b);OGATE,XP(C)::QAB1(E)
- B(h);N_GUARD::B(I),XB(h)
- B(h);N_GUARD::B(I)
- S(f);N_GUARD::S(B),XP(b)
- P(a);N_GUARD::S(B)
- Refutation
- P(g);
- Try
- B(I);P_PINS(f),XP(i)
- Threat
- S(B),XP(b)
- Refutation
- P(g);
- Try
- Q(E);P_PINP(d)
- Threat
- P(C)
- Vars
- S(f);N_GUARD,N_SPINP(d),XQ(E)::S(B),XP(b)
- S(f);N_GUARD::S(B),XP(b)
- Refutation
- P(b);XP(C)
- Try
- Q(E);
- Vars
- P(b);OGATE,XP(C)::QAB(E)+P(D)
- S(f);N_GUARD::S(B),XP(b)
- B(h);N_GUARD::B(I),XB(h)
- B(h);N_GUARD::B(I)
- P(a);N_GUARD::S(B)
- Refutation
- P(g);
- Try
- Q(E);
- Vars
- S(f);N_GUARD::S(B),XP(b)
- P(g);N_GUARD::QAR2(E),XP(d)
- B(h);N_GUARD::B(I),XB(h)
- B(h);N_GUARD::B(I)
- P(a);N_GUARD::S(B)
- Refutation
- P(b);XP(C)
- Try
- Q(E);XP(b)
- Threat
- QAB1(E)
- Vars
- S(f);XQ(E)::S(B),XS(f)
- Refutation
- S(f);
- Try
- Q(E);
- Vars
- P(b);OGATE,XP(C)::QAB1(E)
- S(f);N_GUARD::S(B),XP(b)
- B(h);N_GUARD::B(I),XB(h)
- B(h);N_GUARD::B(I)
- P(a);N_GUARD::S(B)
- Refutation
- P(g);
- Try
- Q(E);
- Vars
- S(f);N_GUARD::S(B),XP(b)
- P(g);OGATE::QAR2(E),XP(d)
- B(h);N_GUARD::B(I),XB(h)
- B(h);N_GUARD::B(I)
- P(a);N_GUARD::S(B)
- Refutation
- P(b);XP(C)
- Try
- Actual
- Q(E);
- Vars
- P(b);OGATE,XP(C)::QAB1(E)
- P(d);N_GUARD,XQ(E)::P(C)
- S(f);N_GUARD::S(B),XP(b)
- P(g);N_GUARD::QAR2(E),XP(d)
- B(h);N_GUARD::B(I),XB(h)
- B(h);N_GUARD::B(I)
- P(a);N_GUARD::S(B)
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).