MESON Chess Problem Database
Problem Display
PID: 264642 (8/1r5B/2q1p3/4b3/Nn1pP3/pPpkN3/5QR1/2n1BK2 w - - 0 1)
Jankevics, Karlis
Zadachi i Etyudi, 2009
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxe4
- 2.Sc5#
- 1...Qd7
- 2.Sc5#
- 1...Qe8
- 2.Sc5#
- 1...Qc5
- 2.Sxc5#
- 1...Qa6
- 2.Sc5#
- 1...Sca2
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Sxb3
- 2.Qe2#
- 1...c2
- 2.Qd2#
- 1...Qxe4
- Tries
- 1.Sc4?
- threat
- 2.Sxe5#
- 2.Qf3#
- 1...Qxc4
- 2.Qf3#
- 1...Rxh7
- 2.Qf3#
- 1...Sxb3
- 2.Sxe5#
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Qb5
- 2.Qf3#
- 1...Qd5
- 2.Qf3#
- 1...Qc5
- 2.Sxc5#
- 2.Qf3#
- 1...Qd6
- 2.Qf3#
- 1...Qc7
- 2.Qf3#
- 1...Rb5
- 2.Qf3#
- 1...Rf7
- 2.Sxe5#
- 1...Bh2
- 2.Qf3#
- 1...Bg3
- 2.Rxg3#
- 2.Qxg3#
- 2.Qf3#
- 1...Bd6
- 2.Qf3#
- 1...Bf6
- 2.Rg3#
- 2.Qg3#
- 2.Qf3#
- 1...Bc7
- 2.Qf3#
- 1...Bg7
- 2.Rg3#
- 2.Qg3#
- 2.Qf3#
- 1...Bb8
- 2.Qf3#
- 1...Bh8
- 2.Rg3#
- 2.Qg3#
- 2.Qf3#
- 1...Sc2
- 2.Sxe5#
- 2.Qxc2#
- 1...Sd5
- 2.Sxe5#
- 2.Qc2#
- 1...Bf4!
- threat
- 1.Sg4?
- threat
- 2.Sxe5#
- 2.Qf3#
- 1...Rxh7
- 2.Qf3#
- 1...Sxb3
- 2.Sxe5#
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Qb5
- 2.Qf3#
- 1...Qd5
- 2.Qf3#
- 1...Qc5
- 2.Sxc5#
- 2.Qf3#
- 1...Qd6
- 2.Qf3#
- 1...Qc7
- 2.Qf3#
- 1...Rb5
- 2.Qf3#
- 1...Rf7
- 2.Sxe5#
- 1...Bh2
- 2.Qf3#
- 1...Bg3
- 2.Rxg3#
- 2.Qxg3#
- 2.Qf3#
- 1...Bd6
- 2.Qf3#
- 1...Bf6
- 2.Rg3#
- 2.Qg3#
- 2.Qf3#
- 1...Bc7
- 2.Qf3#
- 1...Bg7
- 2.Rg3#
- 2.Qg3#
- 2.Qf3#
- 1...Bb8
- 2.Qf3#
- 1...Bh8
- 2.Rg3#
- 2.Qg3#
- 2.Qf3#
- 1...Sc2
- 2.Sxe5#
- 2.Qxc2#
- 1...Sd5
- 2.Sxe5#
- 2.Qc2#
- 1...Bf4!
- threat
- 1.Sd5?
- threat
- 2.Qf3#
- 1...Sxb3
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Bf4
- 2.Sxf4#
- 1...Rf7
- 2.Sxb4#
- 1...Sc2
- 2.Qxc2#
- 1...Sxd5!
- threat
- 1.Sb2+?
- 1...cxb2
- 2.Qd2#
- 1...axb2!
- 1...cxb2
- 1.Qf3?
- threat
- 2.Sd1#
- 2.Sc2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sf5#
- 1...Qxe4
- 2.Sd1#
- 2.Sc2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sc5#
- 2.Bxe4#
- 2.Qxe4#
- 1...Sxb3
- 2.Qe2#
- 1...dxe3
- 2.Qd1#
- 1...Qd5
- 2.Sd1#
- 2.Sc2#
- 2.Sc4#
- 2.Sg4#
- 2.Sxd5#
- 2.Sf5#
- 1...Qc4
- 2.Sd1#
- 2.Sc2#
- 2.Sxc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sf5#
- 1...Rf7
- 2.Sf5#
- 1...Se2
- 2.Qxe2#
- 1...Sc2
- 2.Sxc2#
- 1...Sd5
- 2.Sxd5#
- 1...c2
- 2.Sd1#
- 2.Sxc2#
- 2.Sc4#
- 2.Sg4#
- 2.Sd5#
- 2.Sf5#
- 2.Rd2#
- 1...Bf4!
- threat
- 1.Sc4?
- Keys
- 1.Sf5!
- threat
- 2.Qf3#
- 1...Kxe4
- 2.Se7#
- 1...Qxe4
- 2.Sc5#
- 1...Sxb3
- 2.Qe2#
- 1...Se2
- 2.Qxe2#
- 1...Bf4
- 2.Qxd4#
- 1...Sc2
- 2.Qxc2#
- 1...Sd5
- 2.Qc2#
- threat
- 1.Sf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 6
- Sets
- Q(h);N_GUARD,P_SPINQ(h),XP(H)::S(G)
- Q(h);N_GUARD::S(G)
- Q(h);N_GUARD::S(G),XQ(h)
- S(a);N_GUARD::QAB1(C)
- S(a);N_GUARD::QAB1(C),XS(a)
- S(a);N_GUARD,XP(E)::QAB1(C)
- P(c);N_GUARD::QAR1(C)
- Tries
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- Q(h);XS(F)::QAR2(C)
- R(j);XB(I)::QAR2(C)
- S(a);N_GUARD::QAB1(C),XS(a)
- Q(h);::QAR2(C)
- R(j);::QAR2(C)
- R(j);P_PINQ(C)::S(F),XB(g)
- B(g);::QAR2(C)
- Refutation
- B(g);
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- R(j);XB(I)::QAR2(C)
- S(a);N_GUARD::QAB1(C),XS(a)
- Q(h);::QAR2(C)
- R(j);::QAR2(C)
- R(j);P_PINQ(C)::S(F),XB(g)
- B(g);::QAR2(C)
- Refutation
- B(g);
- Try
- S(F);
- Threat
- QAR2(C)
- Vars
- S(a);N_GUARD,XP(E)::QAB1(C)
- S(a);N_GUARD::QAB1(C),XS(a)
- B(g);N_GUARD::S(F),XB(g)
- R(j);N_GUARD,P_PINQ(C)::S(F),XS(e)
- S(e);N_GUARD::QAB1(C),XS(e)
- Refutation
- S(e);XS(F)
- Try
- S(G);CHECK
- Vars
- P(c);XS(G)::QAR1(C)
- Refutation
- P(b);XS(G)
- Try
- Q(C);
- Threat
- DUALS(6)
- Vars
- S(a);N_GUARD,XP(E)::QAB1(C)
- P(f);P_SPINP(f),SBLOCK,XS(F)::QAR2(C)
- R(j);P_PINQ(C)::QAR(C)+S(F)
- S(a);N_GUARD::QAB1(C),XS(a)
- S(e);::QAR(C)+S(F),XS(e)
- Refutation
- B(g);
- Try
- Actual
- S(F);
- Threat
- QAR2(C)
- Vars
- K(d);S_FLIGHT,XP(H)::B(I)+S(F)
- Q(h);N_GUARD,XP(H)::S(G)
- S(a);N_GUARD,XP(E)::QAB1(C)
- S(a);N_GUARD::QAB1(C),XS(a)
- B(g);N_GUARD::QAR1(C),XP(f)
- S(e);N_GUARD::QAB1(C),XS(e)
- S(e);N_GUARD::QAB1(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).