MESON Chess Problem Database
Problem Display
PID: 149562 (8/1Q6/2p1NKn1/R7/3Pk2p/2r2p2/2P2p2/2B2N2 w - - 0 1)
Katsnelson, Leonard Ilich
Sachove umeni (Ceskoslovensky sach), 1967
#2
8 + 7
| 15148 | Sadier Collection | 2014 |
SOLUTION
- SOUND
- Sets
- 1...Ra3
- 2.Qxc6#
- 1...Rb3
- 2.Qxc6#
- 1...Rd3
- 2.Qxc6#
- 1...Re3
- 2.Sd2#
- 2.Qxc6#
- 1...Sf4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...h3
- 2.Sg3#
- 1...Ra3
- Tries
- 1.Qb2?
- 1...Rxc2
- 2.Qxc2#
- 1...c5
- 2.Qb7#
- 1...Rc4
- 2.Sg5#
- 1...Ra3
- 2.Sg5#
- 1...Rb3
- 2.Sg5#
- 1...Rd3
- 2.Sg5#
- 1...Re3
- 2.Sd2#
- 1...Sf4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...h3
- 2.Sg3#
- 1...Rc5!
- 1...Rxc2
- 1.Qb3?
- 1...Rxc2
- 2.Qxc2#
- 2.Qe3#
- 1...Rc4
- 2.Sd2#
- 2.Qd3#
- 2.Qe3#
- 1...Rd3
- 2.Qxd3#
- 2.cxd3#
- 1...Re3
- 2.Sd2#
- 2.Qxe3#
- 1...Rc5
- 2.Sd2#
- 1...Sf4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...h3
- 2.Sg3#
- 1...c5
- 2.Qb7#
- 1...Rxb3!
- 1...Rxc2
- 1.Qd7?
- threat
- 2.Sg5#
- 1...Re3
- 2.Sd2#
- 2.Qxc6#
- 1...Rc5
- 2.Sxc5#
- 1...Rxc2!
- threat
- 1.Qf7?
- threat
- 2.Qxg6#
- 1...c5
- 2.Qb7#
- 1...Sf4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...Rc5!
- threat
- 1.Qg7?
- threat
- 2.Qxg6#
- 1...c5
- 2.Qb7#
- 1...Sf4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 2.Qg4#
- 1...Sf8
- 2.Re5#
- 2.Qg4#
- 1...Sh8
- 2.Re5#
- 2.Qg4#
- 1...Rc5!
- threat
- 1.Qh7?
- threat
- 2.Re5#
- 2.Qxg6#
- 1...Rxc2
- 2.Qxg6#
- 1...c5
- 2.Qb7#
- 1...Rc5!
- threat
- 1.Qb2?
- Keys
- 1.Qb1!
- 1...Rxc2
- 2.Qxc2#
- 1...Rc5
- 2.c4#
- 1...c5
- 2.Qb7#
- 1...Rc4
- 2.c3#
- 1...Ra3
- 2.c3#
- 1...Rb3
- 2.cxb3#
- 1...Rd3
- 2.cxd3#
- 1...Re3
- 2.Sd2#
- 1...Sf4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...h3
- 2.Sg3#
- 1...Rxc2
- 1.Qb1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 3
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::QAB(H),XP(f)
- S(g);N_GUARD::R1(E)
- S(g);N_GUARD::R1(E),XS(g)
- P(e);N_GUARD::S(B)
- Tries
- Try
- Q(H);N_PINP(f)
- Vars
- R(b);OGATE,XP(C)::QAB(H),XR(b)
- P(f);OGATEB::QAB(H)
- R(b);::S(F)
- R(b);SBLOCK::S(B)
- S(g);N_GUARD::R1(E)
- S(g);N_GUARD::R1(E),XS(g)
- P(e);N_GUARD::S(B)
- Refutation
- R(b);
- Try
- Q(H);N_PINP(f)
- Vars
- R(b);::S(B)
- S(g);N_GUARD::R1(E)
- S(g);N_GUARD::R1(E),XS(g)
- P(e);N_GUARD::S(B)
- P(f);OGATEB::QAB(H)
- Refutation
- R(b);XQ(H)
- Try
- Q(H);N_PINP(f)
- Threat
- S(F)
- Vars
- R(b);N_GUARD::S(F),XR(b)
- Refutation
- R(b);XP(C)
- Try
- Q(H);N_PINP(f)
- Threat
- QAB(H),XS(g)
- Vars
- P(f);OGATEB::QAB(H)
- S(g);N_GUARD::R1(E)
- S(g);N_GUARD::R1(E),XS(g)
- Refutation
- R(b);
- Try
- Q(H);N_PINP(f)
- Threat
- QAB(H),XS(g)
- Vars
- P(f);OGATEB::QAB(H)
- S(g);N_GUARD::R1(E)
- S(g);N_GUARD::R1(E),XS(g)
- Refutation
- R(b);
- Try
- Q(H);N_PINP(f),P_PINS(g)
- Threat
- DUALS(2)
- Vars
- R(b);XP(C)::QAB(H),XS(g)
- P(f);OGATEB::QAB(H)
- Refutation
- R(b);
- Try
- Actual
- Q(H);N_PINP(f)
- Vars
- R(b);OGATE,P_SPINR(b),XP(C)::QAB(H),XR(b)
- R(b);OGATE::QAB(H)+P(C)
- P(f);OGATEB::QAB(H)
- R(b);OGATE::QAB(H)+P(C),XR(b)
- R(b);OGATE::P(C),XR(b)
- R(b);SBLOCK::S(B)
- S(g);N_GUARD::R1(E)
- S(g);N_GUARD::R1(E),XS(g)
- P(e);N_GUARD::S(B)
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).