MESON Chess Problem Database
Problem Display
PID: 132171 (3R4/bK2p1r1/4p1pQ/3N4/1p1Pk1B1/5N2/1rp1P1n1/2B1n3 w - - 0 1)
Onkoud, Abdelaziz
The Problemist, 2008
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Rh7
- 2.Qxg6#
- 1...Se3
- 2.Qxe3#
- 2.Qf4#
- 1...Sf4
- 2.Qxf4#
- 1...Sh4
- 2.Qe3#
- 2.Qf4#
- 1...b3
- 2.Sc3#
- 1...g5
- 2.Qxe6#
- 1...Rh7
- Tries
- 1.Se3?
- threat
- 2.Sd2#
- 1...Bxd4
- 2.Rxd4#
- 1...Sxf3
- 2.Bxf3#
- 1...Sf4
- 2.Sg5#
- 1...g5!
- threat
- 1.Sxb4?
- threat
- 2.Sd2#
- 2.Sg5#
- 1...Bxd4
- 2.Rxd4#
- 1...Sxf3
- 2.exf3#
- 1...Se3
- 2.Sd2#
- 2.Qxe3#
- 1...Sf4
- 2.Sg5#
- 2.Qxf4#
- 1...g5
- 2.Qxe6#
- 1...Rxb4+!
- threat
- 1.Sb6?
- threat
- 2.Sd2#
- 2.Sg5#
- 1...Se3
- 2.Sd2#
- 2.Qxe3#
- 1...Sf4
- 2.Sg5#
- 2.Qxf4#
- 1...g5
- 2.Qxe6#
- 1...Sxf3!
- threat
- 1.Sc7?
- threat
- 2.Sd2#
- 2.Sg5#
- 1...Bxd4
- 2.Rxd4#
- 1...Se3
- 2.Sd2#
- 2.Qxe3#
- 1...Sf4
- 2.Sg5#
- 2.Qxf4#
- 1...g5
- 2.Qxe6#
- 1...Sxf3!
- threat
- 1.Sxe7?
- threat
- 2.Sd2#
- 2.Sg5#
- 1...Bxd4
- 2.Rxd4#
- 1...Sxf3
- 2.Bxf3#
- 1...Se3
- 2.Sd2#
- 2.Qxe3#
- 1...Sf4
- 2.Sg5#
- 2.Qxf4#
- 1...g5
- 2.Qxe6#
- 1...Rxe7+!
- threat
- 1.Qd2?
- threat
- 2.Sg5#
- 1...Bxd4
- 2.Qxd4#
- 1...Sxf3
- 2.Qd3#
- 2.exf3#
- 1...Sd3
- 2.Qxd3#
- 2.exd3#
- 1...g5!
- threat
- 1.Qxg7?
- threat
- 2.Sd2#
- 2.Sg5#
- 2.Qe5#
- 2.Qxg6#
- 1...Bxd4
- 2.Sd2#
- 2.Sg5#
- 2.Qxd4#
- 2.Qxg6#
- 1...exd5
- 2.Sg5#
- 2.Qe5#
- 2.Qxg6#
- 2.Qxe7#
- 1...Bb8
- 2.Sd2#
- 2.Sg5#
- 2.Qxg6#
- 1...Sd3
- 2.Sd2#
- 2.Sg5#
- 2.Qxg6#
- 1...Se3
- 2.Sd2#
- 2.Sg5#
- 2.Qe5#
- 1...Sf4
- 2.Sd2#
- 2.Sg5#
- 2.Qe5#
- 1...Sh4
- 2.Sd2#
- 2.Sg5#
- 2.Qe5#
- 1...e5
- 2.Qxe5#
- 2.Qxg6#
- 1...g5
- 2.Sd2#
- 2.Sxg5#
- 2.Qe5#
- 2.Qg6#
- 2.Qh7#
- 1...Sxf3!
- threat
- 1.Se3?
- Keys
- 1.Sf4!
- threat
- 2.Sg5#
- 1...Bxd4
- 2.Rxd4#
- 1...Sxf3
- 2.exf3#
- 1...Se3
- 2.Sd2#
- 1...g5
- 2.Qxe6#
- threat
- 1.Sf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- R(k);N_GUARD::QAB(G),XP(h)
- S(d);N_GUARD::QAR1(G),XS(d)
- P(e);N_GUARD::S(F)
- P(h);OGATE::QAR2(G),XP(g)
- Tries
- Try
- S(F);
- Threat
- S(C)
- Vars
- B(i);OGATE,XP(D)::R1(I),XB(i)
- S(a);OGATE,XS(C)::B(E),XS(a)
- S(d);SBLOCK::S(C)
- Refutation
- P(h);
- Try
- S(F);P_SPINS(F),XP(e)
- Threat
- DUALS(2)
- Vars
- B(i);OGATE,XP(D)::R1(I),XB(i)
- S(a);OGATE,XS(C)::P(B),XS(a)
- P(h);OGATE::QAR2(G),XP(g)
- Refutation
- R(b);CHECK,XS(F)
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- P(h);OGATE::QAR2(G),XP(g)
- Refutation
- S(a);XS(C)
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- B(i);OGATE,XP(D)::R1(I),XB(i)
- P(h);OGATE::QAR2(G),XP(g)
- Refutation
- S(a);XS(C)
- Try
- S(F);P_SPINS(F),XP(j)
- Threat
- DUALS(2)
- Vars
- B(i);OGATE,XP(D)::R1(I),XB(i)
- S(a);OGATE,XS(C)::B(E),XS(a)
- P(h);OGATE::QAR2(G),XP(g)
- Refutation
- R(k);CHECK,XS(F)
- Try
- Q(G);
- Threat
- S(C)
- Vars
- B(i);OGATE,XP(D)::QAR1(G),XB(i)
- Refutation
- P(h);
- Try
- Q(G);XR(k)
- Threat
- DUALS(4)
- Refutation
- S(a);XS(C)
- Try
- Actual
- S(F);
- Threat
- S(C)
- Vars
- B(i);OGATE,XP(D)::R1(I),XB(i)
- S(a);OGATE,XS(C)::P(B),XS(a)
- S(d);SBLOCK::S(C)
- P(h);OGATE::QAR2(G),XP(g)
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).