MESON Chess Problem Database
Problem Display
PID: 67017 (2r5/p2Br3/6R1/QN1pkp1N/p1p5/5PP1/2R1nBK1/6n1 w - - 0 1)
Onkoud, Abdelaziz
Troll, 2001
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Re6
- 2.Rxe6#
- 1...Rf7
- 2.Re6#
- 1...Rg7
- 2.Re6#
- 1...Rh7
- 2.Re6#
- 1...Rc7
- 2.Qxc7#
- 1...Ra8
- 2.Qc7#
- 1...Rb8
- 2.Qc7#
- 1...Rd8
- 2.Qc7#
- 1...Re8
- 2.Qc7#
- 1...Rf8
- 2.Qc7#
- 1...Rg8
- 2.Qc7#
- 1...Rh8
- 2.Qc7#
- 1...Sxf3
- 2.Rxe2#
- 1...Sh3
- 2.Rxe2#
- 1...Sc1
- 2.Bd4#
- 1...Sc3
- 2.Bd4#
- 1...Sxg3
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...Sf4+
- 2.gxf4#
- 1...d4
- 2.Sc7#
- 1...f4
- 2.Rg5#
- 1...Re6
- Tries
- 1.Sc7?
- threat
- 2.Qxd5#
- 1...Sf4+
- 2.gxf4#
- 1...Rxd7
- 2.Re6#
- 1...Rxc7
- 2.Qxc7#
- 1...Sc3!
- threat
- 1.Bxg1?
- threat
- 2.Rxe2#
- 1...Sf4+
- 2.gxf4#
- 1...Sxg3
- 2.Bd4#
- 1...d4
- 2.Sc7#
- 1...Sc1
- 2.Bd4#
- 1...Sc3
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 1...Sxg1!
- threat
- 1.Rf6?
- threat
- 2.Rxf5#
- 1...Sf4+
- 2.gxf4#
- 1...Sxf3
- 2.Rxe2#
- 1...Sxg3
- 2.Bd4#
- 1...Re6
- 2.Rxe6#
- 1...Rf7
- 2.Re6#
- 1...Rf8
- 2.Qc7#
- 1...Sd4
- 2.Bxd4#
- 1...f4
- 2.Rf5#
- 1...Rxd7!
- threat
- 1.Qe1?
- threat
- 2.Bd4#
- 1...Sxf3
- 2.Rxe2#
- 2.Qxe2#
- 1...d4!
- threat
- 1.Qd2?
- threat
- 2.Qe3#
- 1...Sf4+
- 2.Qxf4#
- 2.gxf4#
- 1...Sxg3
- 2.Bd4#
- 2.Qf4#
- 2.Qd4#
- 1...Sc3
- 2.Bd4#
- 2.Qf4#
- 2.Qd4#
- 1...f4
- 2.Rg5#
- 1...d4!
- threat
- 1.Qc3+?
- 1...Sxc3
- 2.Bd4#
- 1...Sd4
- 2.Bxd4#
- 2.Qxd4#
- 2.Qe3#
- 1...d4!
- 1...Sxc3
- 1.Qb6?
- threat
- 2.Qe3#
- 2.Qd6#
- 2.Qf6#
- 1...Sf4+
- 2.gxf4#
- 1...Rxd7
- 2.Re6#
- 2.Qe3#
- 2.Qe6#
- 2.Qf6#
- 1...Sxf3
- 2.Rxe2#
- 2.Qe3#
- 1...Sxg3
- 2.Bd4#
- 2.Qd4#
- 2.Qd6#
- 2.Qf6#
- 1...d4
- 2.Qd6#
- 1...Re6
- 2.Rxe6#
- 2.Qe3#
- 2.Qxe6#
- 1...Rf7
- 2.Re6#
- 2.Qe3#
- 2.Qd6#
- 2.Qe6#
- 1...Rc5
- 2.Qd6#
- 2.Qf6#
- 1...Rc6
- 2.Qe3#
- 1...Rf8
- 2.Qe3#
- 2.Qc7#
- 2.Qd6#
- 1...Sc3
- 2.Bd4#
- 2.Qd4#
- 2.Qd6#
- 2.Qf6#
- 1...Sd4
- 2.Bxd4#
- 2.Qxd4#
- 2.Qd6#
- 2.Qf6#
- 1...f4
- 2.Rg5#
- 2.Qd6#
- 2.Qf6#
- 1...axb6!
- threat
- 1.Qa6?
- threat
- 2.Qd6#
- 2.Qf6#
- 1...Sf4+
- 2.gxf4#
- 1...Rxd7
- 2.Re6#
- 2.Qe6#
- 2.Qf6#
- 1...Sxf3
- 2.Rxe2#
- 1...d4
- 2.Qd6#
- 1...Re6
- 2.Rxe6#
- 2.Qxe6#
- 1...Rf7
- 2.Re6#
- 2.Qd6#
- 2.Qe6#
- 1...Rf8
- 2.Qd6#
- 1...Rc6!
- threat
- 1.Sc7?
- Keys
- 1.Rc3!
- threat
- 2.Re3#
- 1...Sf4+
- 2.gxf4#
- 1...Sxc3
- 2.Bd4#
- 1...Sxg3
- 2.Bd4#
- 1...d4
- 2.Sc7#
- 1...f4
- 2.Rg5#
- threat
- 1.Rc3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 16
- Sets
- R(i);N_GUARD::R1(I),XR(i)
- R(i);N_GUARD::R1(I)
- R(j);N_GUARD::QAB(F),XR(j)
- R(j);N_GUARD::QAB(F)
- S(a);N_GUARD,XP(D)::R(A),XS(b)
- S(a);N_GUARD::R(A),XS(b)
- S(b);N_GUARD::B(B)
- S(b);N_GUARD,XP(E)::B(B)
- S(b);N_GUARD::B(B),XS(b)
- S(b);CHECK,OGATE::P(E),XS(b)
- P(e);::QAR(F)+S(G)
- P(g);OGATEB::R(I)
- Tries
- Try
- S(G);P_PINP(e)
- Threat
- QAR1(F),XP(e)
- Vars
- S(b);CHECK,OGATE::P(E),XS(b)
- R(i);N_GUARD,XB(J)::R1(I)
- R(j);OGATE,XS(G)::QAB(F),XR(j)
- Refutation
- S(b);
- Try
- B(B);XS(a)
- Threat
- R(A),XS(b)
- Vars
- S(b);CHECK,OGATE::P(E),XS(b)
- S(b);N_GUARD,XP(E)::B(B)
- P(e);::QAR(F)+S(G)
- S(b);N_GUARD::B(B)
- S(b);N_GUARD::B(B),XS(b)
- Refutation
- S(b);XB(B)
- Try
- R(I);
- Threat
- R1(I),XP(g)
- Vars
- S(b);CHECK,OGATE::P(E),XS(b)
- S(a);N_GUARD,XP(D)::R(A),XS(b)
- S(b);N_GUARD,XP(E)::B(B)
- R(i);N_GUARD::R1(I),XR(i)
- R(i);N_GUARD::R1(I)
- R(j);N_GUARD::QAB(F)
- S(b);N_GUARD::B(B),XS(b)
- P(g);::R1(I)
- Refutation
- R(i);XB(J)
- Try
- Q(F);P_PINS(b)
- Threat
- B(B)
- Refutation
- P(e);
- Try
- Q(F);
- Threat
- QAR2(F)
- Vars
- P(g);OGATEB::R(I)
- Refutation
- P(e);
- Try
- Q(F);CHECK
- Vars
- S(b);N_GUARD,XQ(F)::B(B)
- Refutation
- P(e);P_SPINP(e)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- S(b);CHECK,OGATE::P(E),XS(b)
- P(e);::QAB1(F)
- R(j);::QAR2(F)
- Refutation
- P(h);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- S(b);CHECK,OGATE::P(E),XS(b)
- S(a);N_GUARD,XP(D)::R(A),XS(b)
- P(e);::QAB1(F)
- R(j);::QAB1(F)
- Refutation
- R(j);
- Try
- Actual
- R(A);
- Threat
- R(A)
- Vars
- S(b);CHECK,OGATE::P(E),XS(b)
- S(b);N_GUARD,XR(A)::B(B)
- S(b);N_GUARD,XP(E)::B(B)
- P(e);::QAR(F)+S(G)
- P(g);OGATEB::R(I)
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).