MESON Chess Problem Database
Problem Display
PID: 179657 (8/Q4B1P/1N1pPn2/3Pkp1R/1p1rPr2/1K1p1p2/4PN2/4R1B1 w - - 0 1)
Davidovski, Ivan Nikolaevich
Kopnin, Aleksey Grigorevich
4th Place, Perventsvo SSSR, 1979
#2
13 + 9
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rc4
- 2.Sxc4#
- 1...Rdxe4
- 2.Sxd3#
- 1...Rxd5
- 2.Sc4#
- 1...Rg4
- 2.Rxf5#
- 1...Rh4
- 2.Rxf5#
- 1...Sg4
- 2.Sd7#
- 1...Sxd5
- 2.Sd7#
- 1...Sxh5
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sxh7
- 2.Sd7#
- 1...Se8
- 2.Sd7#
- 1...Sg8
- 2.Sd7#
- 1...Rc4
- Tries
- 1.Bh2?
- threat
- 2.Rxf5#
- 1...Rxd5
- 2.Sc4#
- 1...Sxe4
- 2.Sg4#
- 1...Sxh5
- 2.Sd7#
- 1...Rc4
- 2.Sxc4#
- 1...Rxe4!
- threat
- 1.Qa1?
- threat
- 2.Sc4#
- 1...Rxe4
- 2.Sxd3#
- 1...Sxd5
- 2.Sd7#
- 1...Sxh5
- 2.Sd7#
- 1...Sxh7
- 2.Sd7#
- 1...Rg4
- 2.Rxf5#
- 1...Rh4
- 2.Rxf5#
- 1...Sg4
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Se8
- 2.Sd7#
- 1...Sg8
- 2.Sd7#
- 1...Sxe4!
- threat
- 1.h8Q?
- threat
- 2.Sd7#
- 1...Rdxe4
- 2.Sxd3#
- 1...Rg4
- 2.Rxf5#
- 1...Rh4
- 2.Rxf5#
- 1...Rfxe4!
- threat
- 1.h8S?
- threat
- 2.Sg6#
- 1...Rdxe4
- 2.Sxd3#
- 1...Rxd5
- 2.Sc4#
- 1...Sxd5
- 2.Sd7#
- 1...Sxh5
- 2.Sd7#
- 1...Rc4
- 2.Sxc4#
- 1...Rg4
- 2.Rxf5#
- 1...Sg4
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Sh7
- 2.Sd7#
- 1...Se8
- 2.Sd7#
- 1...Sg8
- 2.Sd7#
- 1...Sxe4!
- threat
- 1.h8B?
- threat
- 2.Sd7#
- 1...Rdxe4
- 2.Sxd3#
- 1...Rg4
- 2.Rxf5#
- 1...Rh4
- 2.Rxf5#
- 1...Rfxe4!
- threat
- 1.Bh2?
- Keys
- 1.exd3!
- 1...Rxd3+
- 2.Sxd3#
- 1...Rdxe4
- 2.Qa1#
- 1...Rxd5
- 2.Sc4#
- 1...Rfxe4
- 2.Bh2#
- 1...Sxe4
- 2.h8Q#
- 2.h8B#
- 1...Sxd5
- 2.Sd7#
- 1...Sxh5
- 2.Sd7#
- 1...Sxh7
- 2.Sd7#
- 1...Rc4
- 2.Sxc4#
- 1...Rg4
- 2.Rxf5#
- 1...Rh4
- 2.Rxf5#
- 1...Sg4
- 2.Sd7#
- 1...Sd7
- 2.Sxd7#
- 1...Se8
- 2.Sd7#
- 1...Sg8
- 2.Sd7#
- 1...Rxd3+
- 1.exd3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(d);N_GUARD::S(I),XR(d)
- R(d);N_GUARD,SBLOCK,XP(F)::S(D),XP(a)
- R(d);N_GUARD,XP(G)::S(I)
- R(e);N_GUARD::R1(H),XP(g)
- S(i);N_GUARD::S(I)
- S(i);N_GUARD,XP(G)::S(I)
- S(i);N_GUARD,N_SPINP(g),XR(H)::S(I)
- S(i);N_GUARD::S(I),XS(i)
- S(i);N_GUARD,XP(M)::S(I)
- Tries
- Try
- B(B);P_PINR(e)
- Threat
- R1(H),XP(g)
- Vars
- R(d);N_GUARD,XP(G)::S(I)
- S(i);N_GUARD,SBLOCK,XP(F)::S(D)
- S(i);N_GUARD,N_SPINP(g),XR(H)::S(I)
- R(d);N_GUARD::S(I),XR(d)
- Refutation
- R(d);XP(F)
- Try
- Q(K);P_PINR(d)
- Threat
- S(I)
- Vars
- R(e);SBLOCK,XP(F)::S(D),XP(a)
- S(i);N_GUARD,XP(G)::S(I)
- S(i);N_GUARD,N_SPINP(g),XR(H)::S(I)
- S(i);N_GUARD,XP(M)::S(I)
- R(e);N_GUARD::R1(H),XP(g)
- S(i);N_GUARD::S(I)
- S(i);N_GUARD::S(I),XS(i)
- Refutation
- S(i);XP(F)
- Try
- P(M);P_PINS(i)
- Threat
- S(I)
- Vars
- R(d);N_GUARD,SBLOCK,XP(F)::S(D),XP(a)
- R(e);N_GUARD::R1(H),XP(g)
- Refutation
- R(e);XP(F)
- Try
- P(M);
- Threat
- S(M)
- Vars
- R(d);N_GUARD,SBLOCK,XP(F)::S(D),XP(a)
- R(d);N_GUARD,XP(G)::S(I)
- S(i);N_GUARD,XP(G)::S(I)
- S(i);N_GUARD,N_SPINP(g),XR(H)::S(I)
- R(d);N_GUARD::S(I),XR(d)
- R(e);N_GUARD::R1(H),XP(g)
- S(i);N_GUARD::S(I)
- S(i);N_GUARD::S(I),XS(i)
- Refutation
- S(i);XP(F)
- Try
- P(M);P_PINS(i)
- Threat
- S(I)
- Vars
- R(d);N_GUARD,SBLOCK,XP(F)::S(D),XP(a)
- R(e);N_GUARD::R1(H),XP(g)
- Refutation
- R(e);XP(F)
- Try
- Actual
- P(C);XP(a)
- Vars
- R(d);CHECK,XP(C)::S(D),XR(d)
- R(d);OGATEB,P_SPINR(d),XP(F)::QAB(K)
- R(d);N_GUARD,XP(G)::S(I)
- R(e);OGATEB,P_SPINR(e),XP(F)::B(B)
- S(i);P_SPINS(i),XP(F)::P=Q
- S(i);N_GUARD,XP(G)::S(I)
- S(i);N_GUARD,N_SPINP(g),XR(H)::S(I)
- S(i);N_GUARD,XP(M)::S(I)
- R(d);N_GUARD::S(I),XR(d)
- R(e);N_GUARD::R1(H),XP(g)
- S(i);N_GUARD::S(I)
- S(i);N_GUARD::S(I),XS(i)
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).