MESON Chess Problem Database
Problem Display
PID: 265868 (3B3R/1b3kpK/4p3/1r1p1p2/4N3/2Q5/3R3b/6r1 w - - 0 1)
Onkoud, Abdelaziz
The Problemist, 1996
#2
6 + 9
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sg5#
- 2.Qxg7#
- 1...Rgb1
- 2.Sg5#
- 2.Qxg7#
- 1...Rc1
- 2.Sg5#
- 2.Qxg7#
- 1...Rd1
- 2.Sg5#
- 2.Qxg7#
- 1...Re1
- 2.Sg5#
- 2.Qxg7#
- 1...Rf1
- 2.Sg5#
- 2.Qxg7#
- 1...Rh1
- 2.Sg5#
- 2.Qxg7#
- 1...Rg3
- 2.Sd6#
- 2.Qc7#
- 1...Rg5
- 2.Sxg5#
- 1...Bg3
- 2.Sg5#
- 2.Qxg7#
- 1...Bd6
- 2.Sxd6#
- 1...Bc7
- 2.Qxc7#
- 1...dxe4
- 2.Rd7#
- 1...f4
- 2.Sd6#
- 2.Qc7#
- 1...g5
- 2.Qf6#
- 2.Qg7#
- 1...g6
- 2.Qf6#
- 2.Qg7#
- 1...Ra1
- Tries
- 1.Sg3?
- threat
- 2.Qxg7#
- 2.Qc7#
- 1...Rxg3
- 2.Qc7#
- 1...Bxg3
- 2.Qxg7#
- 1...Rc1
- 2.Qxg7#
- 1...Rc5
- 2.Qxg7#
- 1...Bc6
- 2.Qxg7#
- 1...Bc8
- 2.Qxg7#
- 1...d4
- 2.Qc7#
- 1...g5
- 2.Qf6#
- 2.Qg7#
- 2.Qc7#
- 1...g6
- 2.Qf6#
- 2.Qg7#
- 2.Qc7#
- 1...e5!
- threat
- 1.Rg2?
- threat
- 2.Sg5#
- 2.Qxg7#
- 1...dxe4
- 2.Qxg7#
- 1...fxe4
- 2.Qxg7#
- 1...e5
- 2.Sg5#
- 1...Bf4
- 2.Qxg7#
- 1...Be5
- 2.Sg5#
- 1...d4
- 2.Sg5#
- 1...g5
- 2.Sxg5#
- 2.Qf6#
- 2.Qg7#
- 1...g6
- 2.Sg5#
- 2.Qf6#
- 2.Qg7#
- 1...Rxg2!
- threat
- 1.Rxh2?
- threat
- 2.Sd6#
- 2.Qc7#
- 1...dxe4
- 2.Qc7#
- 1...fxe4
- 2.Rf2#
- 2.Qc7#
- 1...Rc1
- 2.Sg5#
- 2.Sd6#
- 2.Qxg7#
- 1...Rc5
- 2.Sd6#
- 1...Rb6
- 2.Qc7#
- 1...Bc6
- 2.Sd6#
- 1...Bc8
- 2.Sd6#
- 1...e5!
- threat
- 1.Qc5?
- threat
- 2.Rf8#
- 2.Qe7#
- 2.Qf8#
- 1...e5
- 2.Qe7#
- 1...Bd6
- 2.Sxd6#
- 1...Rxc5!
- threat
- 1.Qc6?
- threat
- 2.Qd7#
- 2.Qe8#
- 1...Bd6
- 2.Sxd6#
- 2.Qe8#
- 1...Bc8
- 2.Qe8#
- 1...Bxc6!
- threat
- 1.Sg3?
- Keys
- 1.Qg3!
- threat
- 2.Sg5#
- 2.Sd6#
- 1...Rxg3
- 2.Sd6#
- 1...Bxg3
- 2.Sg5#
- 1...dxe4
- 2.Rd7#
- 1...fxe4
- 2.Rf2#
- 1...e5
- 2.Sg5#
- 1...Rb6
- 2.Sg5#
- 1...g5
- 2.Sxg5#
- 2.Sd6#
- threat
- 1.Qg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- R(a);N_GUARD::S(C),XR(a)
- B(b);N_GUARD::S(C),XB(b)
- B(b);N_GUARD::QAR(B),XB(b)
- P(d);OGATE,XS(C)::R(A)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(a);XS(C)::QAR(B)
- B(b);XS(C)::QAR1(B),XP(i)
- R(a);::QAR1(B),XP(i)
- R(c);::QAR1(B),XP(i)
- B(g);::QAR1(B),XP(i)
- P(d);::QAR(B)
- Refutation
- P(f);
- Try
- R(A);
- Threat
- DUALS(2)
- Vars
- P(d);XS(C)::QAR1(B),XP(i)
- P(e);XS(C)::QAR1(B),XP(i)
- P(f);::S(C)
- B(b);::QAR1(B),XP(i)
- B(b);::S(C)
- P(d);::S(C)
- Refutation
- R(a);XR(A)
- Try
- R(A);XB(b)
- Threat
- DUALS(2)
- Vars
- P(d);XS(C)::QAR(B)
- R(c);::S(C)
- R(c);::QAR(B)
- B(g);::S(C)
- Refutation
- P(f);
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- P(f);::QAR1(B)
- B(b);N_GUARD::S(C),XB(b)
- Refutation
- R(c);XQ(B)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- B(g);::QAB1(B)
- Refutation
- B(g);XQ(B)
- Try
- Actual
- Q(B);
- Threat
- DUALS(2)
- Vars
- R(a);XQ(B)::S(C)
- B(b);XQ(B)::S(C)
- P(d);OGATE,XS(C)::R(A)
- P(e);OGATEB,XS(C)::R(A)
- P(f);::S(C)
- R(c);::S(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).