MESON Chess Problem Database
Problem Display
PID: 28554 (2B5/1p2rR2/4N3/1KQ3P1/3Bk3/1R6/7b/5rq1 w - - 0 1)
Dombrovskis, Alfreds A
9th Place, Source?, 1975-1976
#2
8 + 6
SOLUTION
- SOUND
- Sets
- 1...Qe3
- 2.Rxe3#
- 1...Qxd4
- 2.Qxd4#
- 1...Qh1
- 2.Re3#
- 1...Qg2
- 2.Re3#
- 1...Qg4
- 2.Re3#
- 1...Qxg5
- 2.Sxg5#
- 1...Ra1
- 2.Qf5#
- 1...Rb1
- 2.Qf5#
- 1...Rc1
- 2.Qf5#
- 1...Rd1
- 2.Qf5#
- 1...Re1
- 2.Qf5#
- 1...Rf2
- 2.Re3#
- 1...Rf4
- 2.Qe5#
- 1...Rf5
- 2.Qxf5#
- 1...Re8
- 2.Bxb7#
- 1...Bf4
- 2.Qf5#
- 1...Be5
- 2.Qxe5#
- 1...Bc7
- 2.Bxb7#
- 1...b6
- 2.Qc6#
- 1...Qe3
- Tries
- 1.Bxg1?
- threat
- 2.Re3#
- 2.Qd4#
- 1...Rfxf7
- 2.Re3#
- 1...Rexf7
- 2.Re3#
- 1...Rb1
- 2.Qd4#
- 2.Qf5#
- 1...Rd1
- 2.Re3#
- 2.Qf5#
- 1...Re1
- 2.Qd4#
- 2.Qf5#
- 1...Rf3
- 2.Qd4#
- 1...Rf5
- 2.Re3#
- 2.Qxf5#
- 1...Rf6
- 2.Re3#
- 1...Rd7
- 2.Re3#
- 1...Bf4
- 2.Qd4#
- 2.Qf5#
- 1...Be5
- 2.Re3#
- 1...Bxg1!
- threat
- 1.Bf2?
- threat
- 2.Re3#
- 2.Qd4#
- 2.Qf5#
- 1...Qxg5
- 2.Sxg5#
- 1...Rxf2
- 2.Re3#
- 2.Qd4#
- 1...Rxf7
- 2.Re3#
- 1...Qg3
- 2.Qd4#
- 2.Qf5#
- 1...Qg4
- 2.Re3#
- 2.Qd4#
- 1...Rb1
- 2.Qd4#
- 2.Qf5#
- 1...Rd1
- 2.Re3#
- 2.Qf5#
- 1...Re1
- 2.Qd4#
- 2.Qf5#
- 1...Rd7
- 2.Re3#
- 2.Qf5#
- 1...Bf4
- 2.Rxf4#
- 2.Qd4#
- 2.Qf5#
- 1...Be5
- 2.Re3#
- 1...Qxf2!
- threat
- 1.Rf4+?
- 1...Rxf4
- 2.Qe5#
- 1...Bxf4!
- 1...Rxf4
- 1.Bxg1?
- Keys
- 1.Sf4!
- threat
- 2.Qd5#
- 1...Qxd4
- 2.Qf5#
- 1...Qxg5
- 2.Re3#
- 1...Rxf4
- 2.Rxe7#
- 1...Rxf7
- 2.Qe5#
- 1...Bxf4
- 2.Bf5#
- 1...Re5
- 2.Qxe5#
- 1...Rd7
- 2.Qe5#
- threat
- 1.Sf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 3
- REMOVED MATES = 15
- Sets
- Q(b);N_GUARD::R1(A),XQ(b)
- Q(b);OGATE,XB(B)::QAR1(D),XQ(b)
- Q(b);N_GUARD::R1(A)
- Q(b);P_PINQ(D),XP(E)::S(F),XQ(b)
- R(a);N_GUARD::QAB1(D)
- R(a);N_GUARD,P_PINR(A)::QAB1(D)
- R(a);S_CUTQ(b)::R1(A)
- R(a);S_CUTB(c)::QAR1(D)
- R(a);N_GUARD,P_PINQ(D)::QAB1(D),XR(a)
- R(f);N_GUARD::B(H),XP(e)
- B(c);S_CUTR(a)::QAB1(D)
- B(c);N_GUARD::QAR1(D),XB(c)
- B(c);S_CUTR(f)::B(H),XP(e)
- P(e);N_GUARD::QAB(D)
- Tries
- Try
- B(B);XQ(b)
- Threat
- DUALS(2)
- Vars
- R(a);XR(G)::R1(A)
- R(f);XR(G)::R1(A)
- R(a);::QAR1(D)
- R(a);::R1(A)
- R(f);::R1(A)
- B(c);::R1(A)
- Refutation
- B(c);XB(B)
- Try
- B(B);
- Threat
- DUALS(3)
- Vars
- Q(b);P_PINQ(D),XP(E)::S(F),XQ(b)
- R(f);XR(G)::R1(A)
- B(c);::R1(A)
- Refutation
- Q(b);XB(B)
- Try
- R(G);CHECK
- Vars
- R(a);XR(G)::QAR1(D)
- Refutation
- B(c);XR(G)
- Try
- Actual
- S(F);
- Threat
- QAB1(D)
- Vars
- Q(b);SBLOCK,XB(B)::QAB1(D)
- Q(b);N_GUARD,P_PINQ(D),XP(E)::R1(A)
- R(a);SBLOCK,XS(F)::R(G),XR(f)
- R(f);N_GUARD,XR(G)::QAR1(D)
- B(c);SBLOCK,XS(F)::B(H)
- R(f);N_GUARD,P_PINQ(D)::QAR1(D),XR(f)
- R(f);N_GUARD::QAR1(D)
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).