MESON Chess Problem Database
Problem Display
PID: 27775 (2R1B1K1/1nP1rN2/2P1kBpp/3N2Qb/3qP1R1/2p5/2P3n1/8 w - - 0 1)
Dombrovskis, Alfreds A
Loshinski, Lev Ilich
The Problemist, 1972
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Qe5#
- 1...Qf2
- 2.Qe5#
- 1...Qe3
- 2.Qe5#
- 1...Qc5
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...Qb6
- 2.Qe5#
- 1...Qxf6
- 2.Qxf6#
- 1...Qa7
- 2.Qe5#
- 1...Qd1
- 2.Qe5#
- 1...Qd2
- 2.Qe5#
- 1...Qd3
- 2.Qe5#
- 1...Qa4
- 2.Qe5#
- 1...Qb4
- 2.Qe5#
- 1...Qc4
- 2.Qe5#
- 1...Qxe4
- 2.Rxe4#
- 1...Qxd5
- 2.exd5#
- 1...Rxc7
- 2.Sxc7#
- 1...Rd7
- 2.Bxd7#
- 1...Rxe8+
- 2.Rxe8#
- 1...Bxg4
- 2.Qxg4#
- 1...Se1
- 2.Sf4#
- 1...Se3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Sd6
- 2.Sd8#
- 1...Sd8
- 2.cxd8S#
- 1...Qg1
- Tries
- 1.Sd8+?
- 1...Kd6
- 2.Bxe7#
- 1...Sxd8!
- 1...Kd6
- 1.Bxd4?
- threat
- 2.Qf6#
- 2.Qxe7#
- 2.Qe5#
- 1...Rxe8+
- 2.Rxe8#
- 1...Rxc7
- 2.Sxc7#
- 2.Qf6#
- 2.Qe5#
- 1...Rxf7
- 2.Qe5#
- 1...Rd7
- 2.Bxd7#
- 2.Qf6#
- 2.Qe5#
- 1...hxg5!
- threat
- 1.Sd8+?
- Keys
- 1.Rd8!
- 1...Rxe8+
- 2.Rxe8#
- 1...Qxf6
- 2.Qxf6#
- 1...Qxe4
- 2.Rxe4#
- 1...Qxd5
- 2.exd5#
- 1...Rxc7
- 2.Sxc7#
- 1...Rxf7
- 2.Bxf7#
- 1...Bxg4
- 2.Qxg4#
- 1...Sxd8
- 2.cxd8S#
- 1...hxg5
- 2.Sxg5#
- 1...Qg1
- 2.Qe5#
- 1...Qf2
- 2.Qe5#
- 1...Qe3
- 2.Qe5#
- 1...Qc5
- 2.Qe5#
- 1...Qe5
- 2.Qxe5#
- 1...Qb6
- 2.Qe5#
- 1...Qa7
- 2.Qe5#
- 1...Qd1
- 2.Qe5#
- 1...Qd2
- 2.Qe5#
- 1...Qd3
- 2.Qe5#
- 1...Qa4
- 2.Qe5#
- 1...Qb4
- 2.Qe5#
- 1...Qc4
- 2.Qe5#
- 1...Rd7
- 2.Bxd7#
- 1...Se1
- 2.Sf4#
- 1...Se3
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sh4
- 2.Sf4#
- 1...Sa5
- 2.Rd6#
- 1...Sc5
- 2.Rd6#
- 1...Sd6
- 2.Rxd6#
- 1...Rxe8+
- 1.Rd8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Q(c);N_GUARD::QAR1(E)
- Q(c);N_GUARD::QAR1(E),XQ(c)
- Q(c);OGATE,XB(G)::QAR1(E),XQ(c)
- Q(c);OGATE,XP(B)::R(C),XQ(c)
- Q(c);OGATE,XS(D)::P(B),XQ(c)
- R(i);XP(H)::S(D),XR(i)
- R(i);N_GUARD::B(K),XR(i)
- R(i);CHECK,OGATE,XB(K)::R(J),XR(i)
- B(d);OGATE,XR(C)::QAB(E),XB(d)
- S(a);N_GUARD::S(D)
- S(a);N_GUARD::S(D),XS(a)
- S(h);N_GUARD,SBLOCK::S(I)
- S(h);OGATE::PXS(h)=S
- Tries
- Try
- S(I);CHECK
- Vars
- K(e);P-FLIGHT::B(G),XR(i)
- Refutation
- S(h);XS(I)
- Try
- B(G);XQ(c)
- Threat
- DUALS(3)
- Vars
- R(i);CHECK,OGATE,XB(K)::R(J),XR(i)
- R(i);XS(I)::QAR1(E)
- Refutation
- P(g);XQ(E)
- Try
- Actual
- R(J);
- Vars
- R(i);CHECK,OGATE,XB(K)::R(J),XR(i)
- Q(c);OGATE,XB(G)::QAR1(E),XQ(c)
- Q(c);OGATE,XP(B)::R(C),XQ(c)
- Q(c);OGATE,XS(D)::P(B),XQ(c)
- R(i);XP(H)::S(D),XR(i)
- R(i);OGATE,XS(I)::B(K),XR(i)
- B(d);OGATE,XR(C)::QAB(E),XB(d)
- S(h);OGATE,XR(J)::PXS(h)=S
- P(g);XQ(E)::S(I),XP(g)
- Q(c);N_GUARD::QAR1(E)
- Q(c);N_GUARD::QAR1(E),XQ(c)
- R(i);N_GUARD::B(K),XR(i)
- S(a);N_GUARD::S(D)
- S(a);N_GUARD::S(D),XS(a)
- S(h);N_GUARD::R1(J)
- S(h);N_GUARD::R1(J),XS(h)
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).