MESON Chess Problem Database
Problem Display
PID: 196605 (6b1/4Qn2/p4N2/1pR1rp2/r1p1np2/4kN2/4p1K1/1BR5 w - - 0 1)
Bogdanov, Evgeny Mikhailovich
1st Prize, Suomen Shakki, 1985
#2
7 + 12
SOLUTION
- SOUND
- Sets
- 1...Rxc5
- 2.Rc3#
- 1...Rd5
- 2.Sxd5#
- 1...Re6
- 2.Sd5#
- 1...Rxe7
- 2.Sd5#
- 1...Sd2
- 2.Sd5#
- 2.Rc3#
- 1...Sf2
- 2.Sd5#
- 1...Sc3
- 2.Rxc3#
- 1...Sg3
- 2.Sd5#
- 2.Rc3#
- 1...Sxc5
- 2.Sd5#
- 1...Seg5
- 2.Sd5#
- 2.Rc3#
- 1...Sed6
- 2.Sd5#
- 2.Rc3#
- 1...Sxf6
- 2.Rc3#
- 1...e1Q
- 2.Rxe1#
- 1...e1S+
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...e1R
- 2.Rxe1#
- 1...Rxc5
- Tries
- 1.Rxe5?
- threat
- 2.Sd5#
- 2.Rc3#
- 2.Qc5#
- 2.Qa7#
- 1...e1S+
- 2.Rxe1#
- 1...e1Q
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...e1R
- 2.Rxe1#
- 1...Ra3
- 2.Sd5#
- 2.Qc5#
- 2.Qa7#
- 1...Sg5
- 2.Rc3#
- 2.Qc5#
- 2.Qa7#
- 1...Sd6
- 2.Rc3#
- 2.Qa7#
- 1...Sh6
- 2.Rc3#
- 2.Qc5#
- 2.Qa7#
- 1...Sd8
- 2.Rc3#
- 2.Qc5#
- 2.Qa7#
- 1...Sh8
- 2.Rc3#
- 2.Qc5#
- 2.Qa7#
- 1...c3
- 2.Sd5#
- 2.Rxc3#
- 1...b4
- 2.Sd5#
- 2.Qc5#
- 2.Qa7#
- 1...Sxe5!
- threat
- 1.Qd6?
- threat
- 2.Qd4#
- 1...e1S+
- 2.Rxe1#
- 1...Sexd6
- 2.Rc3#
- 1...e1Q
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...e1R
- 2.Rxe1#
- 1...Rd5
- 2.Sxd5#
- 1...c3
- 2.Qd3#
- 1...Sfxd6!
- threat
- 1.Qxe5?
- threat
- 2.Sd5#
- 2.Rc3#
- 2.Qd4#
- 1...e1S+
- 2.Rxe1#
- 1...e1Q
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...e1R
- 2.Rxe1#
- 1...Ra3
- 2.Sd5#
- 2.Qd4#
- 1...Sg5
- 2.Rc3#
- 2.Qd4#
- 1...Sd6
- 2.Rc3#
- 2.Qd4#
- 1...Sh6
- 2.Rc3#
- 2.Qd4#
- 1...Sd8
- 2.Rc3#
- 2.Qd4#
- 1...Sh8
- 2.Rc3#
- 2.Qd4#
- 1...c3
- 2.Sd5#
- 2.R1xc3#
- 2.R5xc3#
- 1...b4
- 2.Sd5#
- 2.Qd4#
- 1...Sxe5!
- threat
- 1.Qd7?
- threat
- 2.Qd4#
- 1...e1S+
- 2.Rxe1#
- 1...e1Q
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...e1R
- 2.Rxe1#
- 1...Rd5
- 2.Sxd5#
- 1...Sed6
- 2.Rc3#
- 1...c3
- 2.Qd3#
- 1...Sfd6!
- threat
- 1.Rxe5?
- Keys
- 1.Qa7!
- threat
- 2.Rxe5#
- 1...e1S+
- 2.Rxe1#
- 1...Rxc5
- 2.Sd5#
- 1...Sxc5
- 2.Rc3#
- 1...e1Q
- 2.Rxe1#
- 1...e1B
- 2.Rxe1#
- 1...e1R
- 2.Rxe1#
- 1...Rd5
- 2.Sxd5#
- 1...Re6
- 2.Sd5#
- 1...Re7
- 2.Sd5#
- 1...Re8
- 2.Sd5#
- 2.Re5#
- 1...c3
- 2.R5xc3#
- threat
- 1.Qa7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- R(h);P_SPINS(e),XR(E)::R(B)
- R(h);N_GUARD,P_SPINS(e)::S(F),XR(h)
- R(h);N_GUARD::S(F)
- R(h);N_GUARD,XQ(G)::S(F)
- S(e);P_SPINR(h)::S(F)
- S(e);N_GUARD,P_SPINR(h)::R(B),XS(e)
- S(e);P_SPINR(h),XR(E)::S(F)
- S(e);N_GUARD,P_SPINR(h),XS(F)::R(B)
- P(a);OGATEB::R(B),XQ(a)
- P(a);CHECK,OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- Tries
- Try
- R(E);P_PINS(e),XR(h)
- Threat
- DUALS(4)
- Vars
- P(a);CHECK,OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- Refutation
- S(k);N_SPINS(e),XR(E)
- Try
- Q(G);
- Threat
- QAB1(G)
- Vars
- P(a);CHECK,OGATEB::R(B),XS(a)
- S(e);N_GUARD,XQ(G)::R(B)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- R(h);N_GUARD::S(F),XR(h)
- P(d);N_GUARD::QAR1(G)
- Refutation
- S(k);XQ(G)
- Try
- Q(G);P_PINS(e),XR(h)
- Threat
- DUALS(3)
- Vars
- P(a);CHECK,OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- Refutation
- S(k);N_SPINS(e),XQ(G)
- Try
- Q(G);
- Threat
- QAB1(G)
- Vars
- P(a);CHECK,OGATEB::R(B),XS(a)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- R(h);N_GUARD::S(F),XR(h)
- S(e);N_GUARD::R(B)
- P(d);N_GUARD::QAR1(G)
- Refutation
- S(k);
- Try
- Actual
- Q(G);
- Threat
- QAB(G)+R(E),XR(h)
- Vars
- P(a);CHECK,OGATEB::R(B),XS(a)
- R(h);N_GUARD,P_SPINR(h),XR(E)::S(F)
- S(e);N_GUARD,P_SPINS(e),XR(E)::R(B)
- P(a);OGATEB::R(B),XQ(a)
- P(a);OGATEB::R(B),XB(a)
- P(a);OGATEB::R(B),XR(a)
- R(h);N_GUARD::S(F),XR(h)
- R(h);N_GUARD::S(F)
- P(d);OGATE::QAB(G)+R(E),DCHECK,XP(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).