MESON Chess Problem Database
Problem Display
PID: 27636 (1r3nr1/1bN5/5bq1/R7/2pkB2B/N4Rn1/3P4/KQ6 w - - 0 1)
Dombrovskis, Alfreds A
HM., Themes-64, 1959
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxe4
- 2.Qb6#
- 1...Qh7
- 2.Bxf6#
- 1...Qg4
- 2.Bxf6#
- 1...Bxe4
- 2.Qg1#
- 1...Bd5
- 2.Rxd5#
- 1...Ba6
- 2.Rd5#
- 1...Bc8
- 2.Rd5#
- 1...Se2
- 2.Bf2#
- 1...Sxe4
- 2.Sc2#
- 1...Sh5
- 2.Bf2#
- 1...Se6
- 2.Sxe6#
- 1...Sd7
- 2.Se6#
- 1...Sh7
- 2.Se6#
- 1...c3
- 2.Qd3#
- 2.Qb4#
- 2.dxc3#
- 1...Qxe4
- Tries
- 1.Bxg6?
- threat
- 2.Sc2#
- 2.Bxf6#
- 2.Qg1#
- 2.Qb6#
- 1...Bxh4
- 2.Sc2#
- 2.Qg1#
- 2.Qb6#
- 1...Bxf3
- 2.Sc2#
- 2.Bxf6#
- 2.Qg1#
- 1...Sxg6
- 2.Se6#
- 1...Bd5
- 2.Bxf6#
- 2.Rxd5#
- 1...Re8
- 2.Sc2#
- 2.Qb6#
- 1...Be5
- 2.Sc2#
- 2.Qg1#
- 2.Qb6#
- 1...Bg5
- 2.Sc2#
- 2.Qb6#
- 1...Be7
- 2.Sc2#
- 2.Qg1#
- 1...Bg7
- 2.Sc2#
- 2.Qg1#
- 2.Qb6#
- 1...Bd8
- 2.Sc2#
- 2.Qg1#
- 2.Qb6#
- 1...Bh8
- 2.Sc2#
- 2.Qg1#
- 2.Qb6#
- 1...Be4
- 2.Bxf6#
- 2.Qg1#
- 1...Ba6
- 2.Sc2#
- 2.Bxf6#
- 2.Rd5#
- 2.Qg1#
- 1...Bc6
- 2.Sc2#
- 2.Bxf6#
- 2.Qg1#
- 1...Ba8
- 2.Sc2#
- 2.Bxf6#
- 2.Qg1#
- 1...Bc8
- 2.Sc2#
- 2.Bxf6#
- 2.Rd5#
- 2.Qg1#
- 1...Sf1
- 2.Sc2#
- 2.Bxf6#
- 2.Qb6#
- 1...Sh1
- 2.Sc2#
- 2.Bxf6#
- 2.Qb6#
- 1...Se2
- 2.Sc2#
- 2.Bf2#
- 2.Bxf6#
- 2.Qb6#
- 1...Se4
- 2.Sc2#
- 1...Sf5
- 2.Bxf6#
- 1...Sh5
- 2.Sc2#
- 2.Bf2#
- 2.Qg1#
- 2.Qb6#
- 1...Se6
- 2.Sc2#
- 2.Sxe6#
- 2.Bxf6#
- 2.Qg1#
- 1...Sd7
- 2.Sc2#
- 2.Se6#
- 2.Qg1#
- 1...Sh7
- 2.Sc2#
- 2.Se6#
- 2.Qg1#
- 2.Qb6#
- 1...c3
- 2.Bxf6#
- 2.Rd3#
- 2.Qd3#
- 2.Qg1#
- 2.Qb4#
- 2.Qb6#
- 2.dxc3#
- 1...Rxg6!
- threat
- 1.Bxb7?
- threat
- 2.Rd5#
- 2.Qg1#
- 2.Qb6#
- 1...Rxb7
- 2.Rd5#
- 1...Bxh4
- 2.Rd5#
- 2.Qg1#
- 1...Qf5
- 2.Qg1#
- 1...Qc2
- 2.Sxc2#
- 2.Bxf6#
- 2.Qg1#
- 2.Qb6#
- 1...Qd3
- 2.Bxf6#
- 2.Qb6#
- 1...Qe4
- 2.Qb6#
- 1...Qh5
- 2.Sc2#
- 2.Qg1#
- 1...Qf7
- 2.Sc2#
- 2.Qg1#
- 2.Qb6#
- 1...Qe8
- 2.Sc2#
- 2.Rd5#
- 2.Qb6#
- 1...Qg5
- 2.Sc2#
- 1...Qh6
- 2.Sc2#
- 2.Rd5#
- 2.Qb6#
- 1...Rd8
- 2.Qg1#
- 2.Qb6#
- 1...Re8
- 2.Rd5#
- 2.Qb6#
- 1...Be5
- 2.Rd5#
- 2.Qg1#
- 1...Bg5
- 2.Rd5#
- 1...Be7
- 2.Rd5#
- 2.Qg1#
- 1...Bg7
- 2.Rd5#
- 2.Qg1#
- 1...Bd8
- 2.Rd5#
- 2.Qg1#
- 1...Bh8
- 2.Rd5#
- 2.Qg1#
- 1...Sf1
- 2.Rd5#
- 2.Qb6#
- 1...Sh1
- 2.Rd5#
- 2.Qb6#
- 1...Se2
- 2.Bf2#
- 2.Rd5#
- 2.Qb6#
- 1...Se4
- 2.Sc2#
- 2.Rd5#
- 1...Sf5
- 2.Sc2#
- 2.Rf4#
- 2.Rd5#
- 2.Qe4#
- 2.Qb6#
- 1...Sh5
- 2.Bf2#
- 2.Rd5#
- 2.Qb6#
- 1...Se6
- 2.Sxe6#
- 2.Rd5#
- 2.Qg1#
- 1...Sd7
- 2.Se6#
- 2.Rd5#
- 2.Qg1#
- 1...Qxb1+!
- threat
- 1.Rc3?
- threat
- 2.Rxc4#
- 1...Bd5
- 2.Rxd5#
- 1...Ba6
- 2.Rd5#
- 1...Qf7!
- threat
- 1.Rd3+?
- 1...cxd3
- 2.Qxd3#
- 2.Qb4#
- 1...Kxe4+!
- 1...cxd3
- 1.Re3?
- threat
- 2.Sc2#
- 2.Qb6#
- 1...Qxe4
- 2.Qb6#
- 1...Bxh4
- 2.Sc2#
- 1...Sxe4
- 2.Sc2#
- 1...Bd5
- 2.Rxd5#
- 1...Qf5
- 2.Sc2#
- 1...Qh5
- 2.Sc2#
- 1...Qg5
- 2.Sc2#
- 1...Be5
- 2.Sc2#
- 1...Bg5
- 2.Sc2#
- 1...Be7
- 2.Sc2#
- 1...Bg7
- 2.Sc2#
- 1...Bd8
- 2.Sc2#
- 1...Bh8
- 2.Sc2#
- 1...Ba6
- 2.Sc2#
- 2.Rd5#
- 1...Bc6
- 2.Sc2#
- 1...Ba8
- 2.Sc2#
- 1...Bc8
- 2.Sc2#
- 2.Rd5#
- 1...Se6
- 2.Sc2#
- 2.Sxe6#
- 1...Sd7
- 2.Sc2#
- 2.Se6#
- 1...c3
- 2.Qd3#
- 2.Qb4#
- 2.Qb6#
- 1...Bxe4!
- threat
- 1.Qc2?
- threat
- 2.Qxc4#
- 1...Bd5
- 2.Rxd5#
- 1...Ba6
- 2.Rd5#
- 1...c3
- 2.Qd3#
- 2.Qa4#
- 2.dxc3#
- 1...Qf7!
- threat
- 1.Qb2+?
- 1...c3
- 2.Qb4#
- 1...Kxe4!
- 1...c3
- 1.Bxg6?
- Keys
- 1.Rf4!
- threat
- 2.Sc2#
- 2.Qg1#
- 2.Qb6#
- 1...Qxe4
- 2.Bxf6#
- 1...Bxh4
- 2.Sc2#
- 2.Qg1#
- 1...Bxe4
- 2.Rd5#
- 1...Sxe4
- 2.Bf2#
- 1...Bd5
- 2.Rxd5#
- 1...Qf5
- 2.Sc2#
- 2.Qg1#
- 1...Qh5
- 2.Sc2#
- 2.Qg1#
- 1...Qg5
- 2.Sc2#
- 2.Qg1#
- 1...Be5
- 2.Sc2#
- 2.Qg1#
- 1...Bg5
- 2.Sc2#
- 2.Qg1#
- 1...Be7
- 2.Sc2#
- 2.Qg1#
- 1...Bg7
- 2.Sc2#
- 2.Qg1#
- 1...Bd8
- 2.Sc2#
- 2.Qg1#
- 1...Bh8
- 2.Sc2#
- 2.Qg1#
- 1...Ba6
- 2.Sc2#
- 2.Rd5#
- 2.Qg1#
- 1...Bc6
- 2.Sc2#
- 2.Qg1#
- 1...Ba8
- 2.Sc2#
- 2.Qg1#
- 1...Bc8
- 2.Sc2#
- 2.Rd5#
- 2.Qg1#
- 1...Sf1
- 2.Sc2#
- 2.Qb6#
- 1...Sh1
- 2.Sc2#
- 2.Qb6#
- 1...Se2
- 2.Sc2#
- 2.Bf2#
- 2.Qb6#
- 1...Sf5
- 2.Sc2#
- 2.Bc6#
- 2.Bxb7#
- 2.Qb6#
- 1...Sh5
- 2.Sc2#
- 2.Bf2#
- 2.Qb6#
- 1...Se6
- 2.Sc2#
- 2.Sxe6#
- 2.Qg1#
- 1...Sd7
- 2.Sc2#
- 2.Se6#
- 2.Qg1#
- 1...c3
- 2.Qd3#
- 2.Qg1#
- 2.Qb4#
- 2.Qb6#
- threat
- 1.Rf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 9
- Sets
- Q(e);SBLOCK,XB(F)::QAB(B)
- Q(e);N_GUARD::B(G),XB(d)
- B(f);SBLOCK,XB(F)::QAB(B)
- B(f);N_GUARD::R1(H),XB(f)
- B(f);N_GUARD::R1(H)
- S(a);OGATE::B(G)
- S(a);SBLOCK,XB(F)::S(D)
- S(h);N_GUARD::S(I),XS(h)
- S(h);N_GUARD::S(I)
- Tries
- Try
- B(F);XQ(e)
- Threat
- DUALS(4)
- Vars
- S(h);N_GUARD,XB(F)::S(I)
- S(a);::S(D)
- S(a);::B(G),XB(d)
- Refutation
- R(i);XB(F)
- Try
- B(F);XB(f)
- Threat
- DUALS(3)
- Vars
- R(g);XB(F)::R1(H)
- Q(e);::QAB(B)
- Q(e);N_GUARD::S(D)
- B(d);::R1(H)
- Refutation
- Q(e);CHECK,XQ(B)
- Try
- R(E);
- Threat
- R1(E),XP(b)
- Vars
- B(f);N_GUARD::R1(H),XB(f)
- B(f);N_GUARD::R1(H)
- Refutation
- Q(e);
- Try
- R(E);CHECK
- Refutation
- K(c);CHECK,P-FLIGHT,XB(F)
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- Q(e);XB(F)::QAB(B)
- B(d);XB(G)::S(D)
- S(a);XB(F)::S(D)
- B(f);N_GUARD::R1(H),XB(f)
- Q(e);::S(D)
- B(d);::S(D)
- B(f);::S(D)
- Refutation
- B(f);XB(F)
- Try
- Q(B);
- Threat
- QAR1(B),XP(b)
- Vars
- B(f);N_GUARD::R1(H),XB(f)
- B(f);N_GUARD::R1(H)
- Refutation
- Q(e);
- Try
- Q(B);CHECK
- Vars
- P(b);OGATEB,P_SPINP(b)::QAR2(B)
- Refutation
- K(c);P-FLIGHT,P_PINQ(B),XB(F)
- Try
- Actual
- R(E);
- Threat
- DUALS(3)
- Vars
- Q(e);N_GUARD,P_SPINQ(e),XB(F)::B(G),XB(d)
- B(f);N_GUARD,P_SPINB(f),XB(F)::R1(H)
- S(a);OGATE,P_SPINS(a),XB(F)::B(G)
- B(f);N_GUARD::R1(H),XB(f)
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).