MESON Chess Problem Database
Problem Display
PID: 160937 (Q7/8/1p2p3/1PPnB1np/7p/p1P1k2p/3R1N1R/2K1N3 w - - 0 1)
Onkoud, Abdelaziz
Neue Osnabrucker Zeitung, 2000
#2
10 + 9
| 15391 | Problemschach-Jahrbuch (2000) | 2001 |
SOLUTION
- SOUND
- Sets
- 1...Sxc3
- 2.Sc2#
- 1...Sb4
- 2.Sd1#
- 1...Sf4
- 2.Sc2#
- 2.Sd1#
- 2.Bd4#
- 1...Sf6
- 2.Sc2#
- 2.Sd1#
- 1...Sc7
- 2.Sc2#
- 2.Sd1#
- 1...Se7
- 2.Sc2#
- 2.Sd1#
- 1...Sf3
- 2.Sc2#
- 1...Se4
- 2.Sd1#
- 1...Sf7
- 2.Rxh3#
- 1...Sh7
- 2.Rxh3#
- 1...Sxc3
- Tries
- 1.Kd1?
- threat
- 2.Re2#
- 2.Rd3#
- 1...Sb4
- 2.Re2#
- 1...Sf4
- 2.Sc2#
- 2.Bd4#
- 1...Sxc3+!
- threat
- 1.Sh1?
- threat
- 2.Rde2#
- 2.Rhe2#
- 1...Sxc3
- 2.Sc2#
- 2.Rd3#
- 1...Sf4
- 2.Sc2#
- 2.Bd4#
- 1...Ke4!
- threat
- 1.Sfd3?
- threat
- 2.Rde2#
- 2.Rhe2#
- 1...Sxc3
- 2.Sc2#
- 1...Sf4
- 2.Sc2#
- 2.Bd4#
- 2.Bxf4#
- 1...Ke4!
- threat
- 1.Sxh3?
- threat
- 2.Rde2#
- 2.Rhe2#
- 1...Sxc3
- 2.Sc2#
- 2.Sg2#
- 2.Bd4#
- 2.Bf4#
- 2.Rd3#
- 1...Sf4
- 2.Sc2#
- 2.Bd4#
- 2.Bxf4#
- 1...Ke4!
- threat
- 1.Se4?
- threat
- 2.Rde2#
- 2.Rhe2#
- 1...Sxc3
- 2.Rd3#
- 1...Sf4
- 2.Bd4#
- 1...Kxe4!
- threat
- 1.Sg4+?
- 1...hxg4
- 2.Rde2#
- 2.Rhe2#
- 1...Ke4!
- 1...hxg4
- 1.Bf4+?
- 1...Sxf4
- 2.Sc2#
- 2.Sd1#
- 1...Kxf4!
- 1...Sxf4
- 1.Rxh3+?
- 1...Sf3
- 2.Sc2#
- 2.Sg2#
- 2.Rxf3#
- 1...Sxh3!
- 1...Sf3
- 1.Qxd5?
- threat
- 2.Sc2#
- 2.Sd1#
- 2.Qd3#
- 2.Qd4#
- 1...bxc5
- 2.Sc2#
- 2.Sd1#
- 2.Qd3#
- 2.Qxc5#
- 1...Sf3
- 2.Sc2#
- 2.Sd1#
- 2.Qxf3#
- 2.Qe4#
- 2.Qd3#
- 1...Se4
- 2.Sd1#
- 2.Qxe4#
- 2.Qd3#
- 2.Qd4#
- 1...exd5!
- threat
- 1.Qc6?
- 1...Sxc3
- 2.Sc2#
- 1...bxc5
- 2.Qxc5#
- 1...Sb4
- 2.Sd1#
- 1...Sf4
- 2.Sc2#
- 2.Sd1#
- 2.Bd4#
- 1...Sf6
- 2.Sc2#
- 2.Sd1#
- 1...Sc7
- 2.Sc2#
- 2.Sd1#
- 1...Se7
- 2.Sc2#
- 2.Sd1#
- 1...Sf3
- 2.Sc2#
- 1...Se4
- 2.Sd1#
- 1...Sf7
- 2.Rxh3#
- 1...Sh7
- 2.Rxh3#
- 1...a2!
- 1...Sxc3
- 1.Qa4?
- threat
- 2.Sd1#
- 2.Qd4#
- 1...Sxc3
- 2.Bf4#
- 2.Qd4#
- 2.Qf4#
- 1...bxc5
- 2.Sd1#
- 1...Sf3
- 2.Sc2#
- 2.Sd1#
- 2.Qe4#
- 1...Sb4!
- threat
- 1.Qf8?
- threat
- 2.Sc2#
- 2.Bd4#
- 1...bxc5
- 2.Sc2#
- 2.Qxc5#
- 1...Sb4
- 2.Bd4#
- 2.Bf4#
- 2.Qf4#
- 1...Sf4
- 2.Bd4#
- 2.Bxf4#
- 2.Qxf4#
- 1...Sf3
- 2.Sc2#
- 2.Qxf3#
- 1...Sf7
- 2.Rxh3#
- 1...Sf6!
- threat
- 1.cxb6?
- 1...Sxc3
- 2.Sc2#
- 1...Sxb6
- 2.Sc2#
- 2.Sd1#
- 1...Sb4
- 2.Sd1#
- 1...Sf4
- 2.Sc2#
- 2.Sd1#
- 2.Bd4#
- 1...Sf6
- 2.Sc2#
- 2.Sd1#
- 1...Sc7
- 2.Sc2#
- 2.Sd1#
- 1...Se7
- 2.Sc2#
- 2.Sd1#
- 1...Sf3
- 2.Sc2#
- 1...Se4
- 2.Sd1#
- 1...Sf7
- 2.Rxh3#
- 1...Sh7
- 2.Rxh3#
- 1...a2!
- 1...Sxc3
- 1.Kd1?
- Keys
- 1.Qxa3!
- 1...Sxc3
- 2.Qxc3#
- 1...bxc5
- 2.Qxc5#
- 1...Sb4
- 2.cxb4#
- 1...Sf4
- 2.Bd4#
- 1...Sf6
- 2.c4#
- 1...Sc7
- 2.c4#
- 1...Se7
- 2.c4#
- 1...Sf3
- 2.Sc2#
- 1...Se4
- 2.Sd1#
- 1...Sf7
- 2.Rxh3#
- 1...Sh7
- 2.Rxh3#
- 1...Sxc3
- 1.Qxa3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- S(e);XP(F)::S(B)
- S(e);::S(D)
- S(f);SBLOCK::S(B)
- S(f);SBLOCK::S(D)
- S(f);N_GUARD::R(E),XP(c)
- Tries
- Try
- K(A);P-FLIGHT
- Threat
- DUALS(2)
- Vars
- S(e);::R1(C)
- Refutation
- S(e);CHECK,XP(F)
- Try
- S(D);
- Threat
- DUALS(2)
- Refutation
- K(b);P-FLIGHT,P_SPINS(e)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- S(e);XP(F)::S(B)
- Refutation
- K(b);P-FLIGHT,P_SPINS(e)
- Try
- S(D);XP(c)
- Threat
- DUALS(2)
- Refutation
- K(b);P-FLIGHT,P_SPINS(e)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- S(e);XP(F)::R1(C)
- S(e);SBLOCK::B(I)
- Refutation
- K(b);P-FLIGHT,P_SPINS(e),XS(D)
- Try
- S(D);CHECK
- Refutation
- K(b);P-FLIGHT,P_SPINS(e)
- Try
- B(I);CHECK
- Refutation
- K(b);S_FLIGHT,XB(I)
- Try
- R(E);CHECK,XP(c)
- Refutation
- S(f);XR(E)
- Try
- Q(J);XS(e)
- Threat
- DUALS(4)
- Refutation
- P(i);XQ(J)
- Try
- Q(J);
- Vars
- S(e);XP(F)::S(B)
- P(h);OGATE,XP(H)::QAB(J),XP(h)
- S(e);::S(D)
- S(f);SBLOCK::S(B)
- S(f);SBLOCK::S(D)
- S(f);N_GUARD::R(E),XP(c)
- Refutation
- P(a);
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- P(h);XP(H)::S(D)
- Refutation
- S(e);
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- S(f);N_GUARD::R(E),XP(c)
- Refutation
- S(e);
- Try
- P(H);XP(h)
- Vars
- S(e);XP(F)::S(B)
- S(e);::S(D)
- S(f);SBLOCK::S(B)
- S(f);SBLOCK::S(D)
- S(f);N_GUARD::R(E),XP(c)
- Refutation
- P(a);
- Try
- Actual
- Q(J);XP(a)
- Vars
- S(e);OGATE,P_SPINS(e),XP(F)::QAR2(J),XS(e)
- P(h);OGATE,XP(H)::QAB(J),XP(h)
- S(e);OGATE::QAR(J)+P(F),XS(e)
- S(e);SBLOCK::B(I)
- S(e);N_GUARD::QAR(J)+P(F)
- S(f);SBLOCK::S(B)
- S(f);SBLOCK::S(D)
- S(f);N_GUARD::R(E),XP(c)
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).