MESON Chess Problem Database
Problem Display
PID: 245299 (8/8/3Q2pN/1Kpp2r1/1PPppRp1/1N1Pk1P1/8/5B2 w - - 0 1)
Onkoud, Abdelaziz
Sachsische Zeitung, 1997
#2
10 + 8
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Re5
- 2.Sxg4#
- 1...Rf5
- 2.Sxg4#
- 1...Rh5
- 2.Sxg4#
- 1...Re5
- Tries
- 1.Rf2?
- threat
- 2.Qf4#
- 1...Re5
- 2.Sxg4#
- 1...Rf5
- 2.Sxg4#
- 1...Kxf2!
- threat
- 1.Rxe4+?
- 1...Kf3
- 2.Qf4#
- 1...dxe4
- 2.Qf4#
- 1...Kf2!
- 1...Kf3
- 1.Rf6?
- threat
- 2.Qf4#
- 1...Re5
- 2.Sxg4#
- 1...Rf5!
- threat
- 1.Rf7?
- threat
- 2.Qf4#
- 1...Re5
- 2.Sxg4#
- 1...Rf5!
- threat
- 1.Rf8?
- threat
- 2.Qf4#
- 1...Re5
- 2.Sxg4#
- 1...Rf5!
- threat
- 1.Qe7?
- 1...dxc4
- 2.Qxe4#
- 1...Re5
- 2.Sxg4#
- 1...Rf5
- 2.Sxg4#
- 1...Rh5
- 2.Sxg4#
- 1...cxb4!
- 1...dxc4
- 1.Qxd5?
- threat
- 2.Qxe4#
- 1...Rxd5
- 2.Sxg4#
- 1...exd3
- 2.Qe4#
- 1...Re5
- 2.Sxg4#
- 1...cxb4!
- threat
- 1.Qe6?
- 1...dxc4
- 2.Qxe4#
- 1...Re5
- 2.Sxg4#
- 1...Rf5
- 2.Sxg4#
- 1...Rh5
- 2.Sxg4#
- 1...cxb4!
- 1...dxc4
- 1.Qf6?
- 1...cxb4
- 2.Qxd4#
- 1...dxc4
- 2.Rxe4#
- 1...Re5
- 2.Sxg4#
- 1...Rf5
- 2.Sxg4#
- 1...Rh5
- 2.Sxg4#
- 1...exd3!
- 1...cxb4
- 1.Qxg6?
- 1...Rxg6
- 2.Sf5#
- 1...exd3
- 2.Qxd3#
- 1...dxc4
- 2.Qxe4#
- 1...Re5
- 2.Sxg4#
- 1...Rf5
- 2.Sxg4#
- 2.Sxf5#
- 1...Rh5
- 2.Sxg4#
- 1...cxb4!
- 1...Rxg6
- 1.bxc5?
- 1...dxc4
- 2.Qxd4#
- 1...Re5
- 2.Sxg4#
- 1...Rf5
- 2.Sxg4#
- 1...Rh5
- 2.Sxg4#
- 1...exd3!
- 1...dxc4
- 1.Rf2?
- Keys
- 1.Qe5!
- 1...Rxe5
- 2.Sxg4#
- 1...cxb4
- 2.Qxd4#
- 1...dxc4
- 2.Qxe4#
- 1...Rf5
- 2.Sxg4#
- 1...Rh5
- 2.Sxg4#
- 1...Rxe5
- 1.Qe5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(g);N_GUARD::S(J),XP(d)
- Tries
- Try
- R(G);
- Threat
- QAB1(I)
- Vars
- R(g);N_GUARD::S(J),XP(d)
- Refutation
- K(a);S_FLIGHT,XR(G)
- Try
- R(G);CHECK,XP(c)
- Vars
- K(a);P-FLIGHT::QAR1(I)
- P(f);XR(G)::QAB1(I)
- Refutation
- K(a);S_FLIGHT
- Try
- R(G);
- Threat
- QAB1(I)
- Vars
- R(g);N_GUARD::S(J),XP(d)
- Refutation
- R(g);
- Try
- R(G);
- Threat
- QAB1(I)
- Vars
- R(g);N_GUARD::S(J),XP(d)
- Refutation
- R(g);
- Try
- R(G);
- Threat
- QAB1(I)
- Vars
- R(g);N_GUARD::S(J),XP(d)
- Refutation
- R(g);
- Try
- Q(I);P_PINP(c)
- Vars
- P(f);N_GUARD,XP(F)::QAR1(I),XP(c)
- R(g);N_GUARD,N_SPINP(c)::S(J),XP(d)
- R(g);N_GUARD::S(J),XP(d)
- Refutation
- P(e);XP(E)
- Try
- Q(I);XP(f)
- Threat
- QAR1(I),XP(c)
- Vars
- R(g);N_GUARD,XQ(I)::S(J),XP(d)
- P(c);XP(C)::QAR1(I)
- R(g);N_GUARD::S(J),XP(d)
- Refutation
- P(e);P_PINQ(I),XP(E)
- Try
- Q(I);P_PINP(c)
- Vars
- P(f);N_GUARD,XP(F)::QAR1(I),XP(c)
- R(g);N_GUARD,N_SPINP(c)::S(J),XP(d)
- R(g);N_GUARD::S(J),XP(d)
- Refutation
- P(e);XP(E)
- Try
- Q(I);
- Vars
- P(e);N_GUARD,XP(E)::QAB1(I),XP(b)
- P(f);N_GUARD,XP(F)::R1(G),XP(c)
- R(g);N_GUARD::S(J),XP(d)
- Refutation
- P(c);XP(C)
- Try
- Q(I);XP(h)
- Vars
- R(g);N_GUARD,XQ(I)::S(J)
- P(c);OGATE,XP(C)::QAR1(I),XP(c)
- P(f);N_GUARD,XP(F)::QAR1(I),XP(c)
- R(g);N_GUARD::S(J),XP(d)
- Refutation
- P(e);XP(E)
- Try
- P(E);XP(e)
- Vars
- P(f);OGATE,P_PINP(E),XP(F)::QAB1(I),XP(b)
- R(g);N_GUARD::S(J),XP(d)
- Refutation
- P(c);XP(C)
- Try
- Actual
- Q(I);P_PINP(c)
- Vars
- R(g);N_GUARD,N_SPINP(c),XQ(I)::S(J),XP(d)
- P(e);N_GUARD,XP(E)::QAB1(I),XP(b)
- P(f);N_GUARD,XP(F)::QAR1(I),XP(c)
- R(g);N_GUARD::S(J),XP(d)
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).