MESON Chess Problem Database
Problem Display
PID: 134953 (3R1B2/r2q3B/n1N1pP2/pPpk1P2/K1pbN3/1pr5/n3Q1b1/3R4 w - - 0 1)
Onkoud, Abdelaziz
Troll, 2008
#2
11 + 13
SOLUTION
- SOUND
- Sets
- 1...Qd6
- 2.Rxd6#
- 1...Ra8
- 2.Rxd7#
- 1...Sc1
- 2.Sxc3#
- 1...S2b4
- 2.Sxc3#
- 1...Sc7
- 2.Rxd7#
- 1...exf5
- 2.Bg8#
- 1...e5
- 2.Se7#
- 2.Bg8#
- 1...Qd6
- Tries
- 1.Sf2?
- threat
- 2.Qe5#
- 2.Qxe6#
- 1...exf5
- 2.Bg8#
- 2.Qe5#
- 1...Rd3
- 2.Qxe6#
- 1...Be4
- 2.Qxe4#
- 1...Sc7
- 2.Rxd7#
- 2.Qe5#
- 1...e5
- 2.Bg8#
- 2.Qxe5#
- 1...Re3!
- threat
- 1.Sg3?
- threat
- 2.Qe5#
- 2.Qxe6#
- 1...exf5
- 2.Bg8#
- 2.Qe5#
- 1...Rd3
- 2.Qxe6#
- 1...Be4
- 2.Qxe4#
- 1...Sc7
- 2.Rxd7#
- 2.Qe5#
- 1...e5
- 2.Bg8#
- 2.Qxe5#
- 1...Re3!
- threat
- 1.Sxc5?
- threat
- 2.Rxd4#
- 2.Qe5#
- 2.Qxe6#
- 1...exf5
- 2.Bg8#
- 2.Rxd4#
- 2.Qe5#
- 2.Qe6#
- 1...Qd6
- 2.Qe5#
- 1...Re3
- 2.Rxd4#
- 1...Rd3
- 2.Qxe6#
- 1...Be4
- 2.Rxd4#
- 2.Qxe4#
- 1...Sc7
- 2.Rxd4#
- 2.Rxd7#
- 2.Qe5#
- 1...e5
- 2.Bg8#
- 2.Qxe5#
- 1...Sxc5+!
- threat
- 1.Sg5?
- threat
- 2.Qe5#
- 2.Qxe6#
- 1...exf5
- 2.Bg8#
- 2.Qe5#
- 2.Qe6#
- 1...Rd3
- 2.Qxe6#
- 1...Be4
- 2.Qxe4#
- 1...Sc7
- 2.Rxd7#
- 2.Qe5#
- 1...e5
- 2.Bg8#
- 2.Qxe5#
- 1...Re3!
- threat
- 1.Sd6?
- threat
- 2.Qe5#
- 1...Qxc6
- 2.Qxe6#
- 1...Re3
- 2.Qxc4#
- 1...Be4
- 2.Qxe4#
- 1...e5
- 2.Qxe5#
- 1...Rd3!
- threat
- 1.Bg8?
- threat
- 2.Bxe6#
- 1...Sc7
- 2.Rxd7#
- 1...Re3!
- threat
- 1.Qxg2?
- threat
- 2.Sxc3#
- 1...exf5
- 2.Bg8#
- 1...Re3
- 2.Sc3#
- 1...Rc1
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sxc5#
- 2.Sg5#
- 2.Sd6#
- 1...Rc2
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 1...Rd3
- 2.Sc3#
- 1...Rg3
- 2.Sc3#
- 2.Sxg3#
- 1...Rh3
- 2.Sc3#
- 2.Sg3#
- 1...Rf3!
- threat
- 1.Sf2?
- Keys
- 1.Sd2!
- threat
- 2.Qxe6#
- 1...exf5
- 2.Bg8#
- 1...Re3
- 2.Qxc4#
- 1...Be4
- 2.Qxe4#
- 1...Be3
- 2.Qxg2#
- 1...Be5
- 2.Qxe5#
- 1...Sc7
- 2.Rxd7#
- 1...e5
- 2.Bg8#
- threat
- 1.Sd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 4
- Sets
- Q(m);OGATE::R1(J),XQ(m)
- R(l);N_GUARD::R(J),XQ(m)
- S(a);N_GUARD::S(D),XR(d)
- S(j);S_CUTR(l)::R(J),XQ(m)
- P(k);OGATEB,XP(F)::B(I)
- Tries
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(d);N_SPINB(f)::QAB1(B),XP(k)
- B(b);N_GUARD::QAB1(B),XB(b)
- Refutation
- R(d);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(d);N_SPINB(f)::QAB1(B),XP(k)
- B(b);N_GUARD::QAB1(B),XB(b)
- Refutation
- R(d);
- Try
- S(D);XP(h)
- Threat
- DUALS(3)
- Vars
- Q(m);::QAR1(B)
- R(d);::R1(A),XB(f)
- R(d);N_SPINB(f)::QAB1(B),XP(k)
- Refutation
- S(j);CHECK,XS(D)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(d);N_SPINB(f)::QAB1(B),XP(k)
- B(b);N_GUARD::QAB1(B),XB(b)
- Refutation
- R(d);
- Try
- S(D);N_PINQ(m)
- Threat
- QAR1(B)
- Vars
- Q(m);N_GUARD,P_PINP(E),XS(G)::QAB1(B),XP(k)
- R(d);N_GUARD::QAB1(B),XP(e)
- B(b);N_GUARD::QAB1(B),XB(b)
- P(k);::QAR1(B),XP(k)
- Refutation
- R(d);N_SPINB(f)
- Try
- B(I);P_PINP(k)
- Threat
- B(I),XP(k)
- Vars
- S(j);S_CUTR(l)::R(J),XQ(m)
- Refutation
- R(d);
- Try
- Q(B);XB(b)
- Threat
- QAB(B)+S(D),DCHECK,XR(d)
- Vars
- P(k);OGATEB,XP(F)::B(I)
- R(d);::QAB(B)+S(D),DCHECK
- R(d);N_SPINB(f)::QAB(B)+S(D),DCHECK
- Refutation
- R(d);
- Try
- Actual
- S(D);N_PINB(f)
- Threat
- QAB1(B),XP(k)
- Vars
- P(k);OGATEB,XP(F)::B(I)
- R(d);N_GUARD::QAB1(B),XP(e)
- B(b);N_GUARD::QAB1(B),XB(b)
- B(f);S_CUTR(d)::QAB(B),XB(b)
- B(f);N_GUARD::QAR1(B),XB(f)
- S(j);S_CUTR(l)::R(J),XQ(m)
- P(k);OGATEB::B(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).