MESON Chess Problem Database
Problem Display
PID: 138695 (5B2/p1R2Nb1/3Pkp2/1R1rPnPK/2P1n1Pp/Q2B2p1/q7/1b6 w - - 0 1)
Onkoud, Abdelaziz
StrateGems, 2010
#2
12 + 11
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.cxd5#
- 1...Qb2
- 2.cxd5#
- 1...Qc2
- 2.cxd5#
- 1...Qd2
- 2.cxd5#
- 1...Qe2
- 2.cxd5#
- 1...Qf2
- 2.cxd5#
- 1...Qg2
- 2.cxd5#
- 1...Qh2
- 2.cxd5#
- 1...Qxa3
- 2.cxd5#
- 1...Rxd3
- 2.Sd8#
- 1...Rd4
- 2.Sd8#
- 1...Rxe5
- 2.Sd8#
- 1...Sd2
- 2.gxf5#
- 1...Sf2
- 2.gxf5#
- 1...Sc3
- 2.gxf5#
- 1...Sc5
- 2.gxf5#
- 1...Sxg5
- 2.gxf5#
- 1...Se3
- 2.Re7#
- 1...Sd4
- 2.Re7#
- 1...Sxd6
- 2.Re7#
- 1...Sh6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...fxe5
- 2.Sd8#
- 1...Qa1
- Tries
- 1.Kg6?
- threat
- 2.gxf5#
- 1...Se7+
- 2.Rxe7#
- 1...Rxe5
- 2.Sd8#
- 1...Sfxd6
- 2.Re7#
- 1...Qf2
- 2.cxd5#
- 1...Se3
- 2.Re7#
- 1...Sd4
- 2.Re7#
- 1...Sh6
- 2.Re7#
- 1...Sexd6!
- threat
- 1.Bxe4?
- threat
- 2.Bxd5#
- 2.gxf5#
- 1...Qxc4
- 2.gxf5#
- 1...Rxb5
- 2.gxf5#
- 1...Rxe5
- 2.Sd8#
- 1...Rxd6
- 2.gxf5#
- 1...Sxd6
- 2.Bxd5#
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...Qd2
- 2.gxf5#
- 1...Qe2
- 2.Bxd5#
- 2.cxd5#
- 1...Qf2
- 2.Bxd5#
- 2.cxd5#
- 1...Qg2
- 2.cxd5#
- 2.gxf5#
- 1...Rd1
- 2.Sd8#
- 2.gxf5#
- 1...Rd2
- 2.Sd8#
- 2.gxf5#
- 1...Rd3
- 2.Sd8#
- 2.Bxf5#
- 2.gxf5#
- 1...Rd4
- 2.Sd8#
- 2.gxf5#
- 1...Rc5
- 2.gxf5#
- 1...Se3
- 2.Re7#
- 1...Sd4
- 2.Bxd5#
- 2.Re7#
- 1...Sh6
- 2.Bxd5#
- 2.Re7#
- 1...Bxe4!
- threat
- 1.Qb2?
- threat
- 2.Sd8#
- 1...Qxb2
- 2.cxd5#
- 1...Sc3
- 2.gxf5#
- 1...Sd4
- 2.Re7#
- 1...Rxd6!
- threat
- 1.Qc3?
- threat
- 2.Sd8#
- 1...Sxc3
- 2.gxf5#
- 1...Sd4
- 2.Re7#
- 1...Rxd6!
- threat
- 1.Kg6?
- Keys
- 1.Qa6!
- threat
- 2.Qc8#
- 1...Qxa6
- 2.cxd5#
- 1...Rxd6
- 2.Sd8#
- 1...Sexd6
- 2.gxf5#
- 1...Sfxd6
- 2.Re7#
- 1...Se7
- 2.Rxe7#
- 1...Sc5
- 2.gxf5#
- threat
- 1.Qa6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 20
- Sets
- Q(b);N_GUARD::P(C),XR(f)
- Q(b);N_GUARD,P_PINP(D)::P(C),XR(f)
- Q(b);N_GUARD,XQ(A)::P(C),XR(f)
- R(f);XB(B)::S(K)
- R(f);::S(K)
- R(f);XP(F)::S(K)
- S(d);::P(D),XS(g)
- S(d);XP(G)::P(D),XS(g)
- S(g);N_GUARD::R1(J)
- S(g);N_GUARD,XP(I)::R1(J)
- S(g);N_GUARD::R1(J),XS(g)
- P(i);SBLOCK,XP(F)::S(K)
- Tries
- Try
- K(H);S_FLIGHT
- Threat
- P(D),XS(g)
- Vars
- S(g);CHECK,N_GUARD::R1(J),XS(g)
- R(f);XP(F)::S(K)
- S(g);N_GUARD,XP(I)::R1(J)
- Q(b);N_GUARD::P(C),XR(f)
- S(g);N_GUARD::R1(J)
- Refutation
- S(d);XP(I)
- Try
- B(B);XS(d)
- Threat
- DUALS(2)
- Vars
- Q(b);XP(C)::P(D),XS(g)
- R(f);XR(E)::P(D),XS(g)
- R(f);XP(F)::S(K)
- R(f);XP(I)::P(D),XS(g)
- S(g);N_GUARD::R1(J),XS(g)
- Q(b);::P(D),XS(g)
- R(f);::P(D),XS(g)
- S(g);N_GUARD::R1(J)
- Refutation
- B(a);XB(B)
- Try
- Q(A);
- Threat
- S(K)
- Vars
- Q(b);N_GUARD,XQ(A)::P(C),XR(f)
- S(d);::P(D),XS(g)
- S(g);N_GUARD::R1(J)
- Refutation
- R(f);XP(I)
- Try
- Q(A);
- Threat
- S(K)
- Vars
- S(d);XQ(A)::P(D),XS(g)
- S(g);N_GUARD::R1(J)
- Refutation
- R(f);XP(I)
- Try
- Actual
- Q(A);
- Threat
- QAB(A)
- Vars
- Q(b);N_GUARD,XQ(A)::P(C),XR(f)
- R(f);P_SPINR(f),XP(I)::S(K)
- S(d);P_SPINS(d),XP(I)::P(D),XS(g)
- S(g);N_GUARD,P_SPINS(g),XP(I)::R1(J)
- S(g);N_GUARD::R1(J),XS(g)
- S(d);::P(D),XS(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).