MESON Chess Problem Database
Problem Display
PID: 239991 (b3B1N1/pn1pp3/Rn2k3/2rN3R/2p3P1/1Q1rp3/3p2KB/8 w - - 0 1)
Petite, Efren
Sinfonie Scacchistiche, 1975
#2
9 + 12
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rdxd5
- 2.Rh6#
- 1...Ra5
- 2.Sc7#
- 1...Rb5
- 2.Sc7#
- 1...Rcxd5
- 2.Rh6#
- 1...Rc7
- 2.Sxc7#
- 1...Sd6
- 2.Re5#
- 1...c3
- 2.Sc7#
- 2.Rh6#
- 1...d6
- 2.Sf4#
- 1...Rdxd5
- Tries
- 1.Rf5?
- threat
- 2.Bf7#
- 1...Sd6
- 2.Re5#
- 1...d6
- 2.Sf4#
- 1...Sd8!
- threat
- 1.Rxb6+?
- 1...Rc6
- 2.Sc7#
- 1...Sd6
- 2.Re5#
- 1...d6
- 2.Sf4#
- 2.Re5#
- 1...axb6!
- 1...Rc6
- 1.Qa4?
- threat
- 2.Qxd7#
- 1...Rdxd5
- 2.Rh6#
- 1...Rcxd5
- 2.Rh6#
- 1...Sd6
- 2.Re5#
- 1...Rb5
- 2.Sc7#
- 1...Rc7
- 2.Sxc7#
- 1...d6
- 2.Sf4#
- 1...Rc6!
- threat
- 1.Qxc4?
- threat
- 2.Sc7#
- 2.Rh6#
- 2.Qe4#
- 1...Rdxd5
- 2.Rh6#
- 1...Rcxd5
- 2.Rh6#
- 1...Sd6
- 2.Re5#
- 2.Rh6#
- 1...Rd4
- 2.Sc7#
- 2.Rh6#
- 1...Rc7
- 2.Sxc7#
- 2.Rh6#
- 2.Qe4#
- 1...Sa5
- 2.Rh6#
- 2.Qe4#
- 1...Sd8
- 2.Rh6#
- 2.Qe4#
- 1...Rxc4!
- threat
- 1.Qxd3?
- threat
- 2.Sf4#
- 2.Rh6#
- 2.Qe4#
- 2.Qf5#
- 2.Qg6#
- 2.Qxe3#
- 1...Rxd5
- 2.Rh6#
- 2.Qg6#
- 2.Qxd5#
- 1...d1S
- 2.Sf4#
- 2.Rh6#
- 2.Qe4#
- 2.Qf5#
- 2.Qg6#
- 1...Sa5
- 2.Rh6#
- 2.Qe4#
- 2.Qf5#
- 2.Qg6#
- 2.Qxe3#
- 1...Sd6
- 2.Re5#
- 2.Rh6#
- 2.Qg6#
- 1...Sd8
- 2.Rh6#
- 2.Qe4#
- 2.Qf5#
- 2.Qg6#
- 2.Qxe3#
- 1...e2
- 2.Sf4#
- 2.Rh6#
- 2.Qxe2#
- 2.Qe4#
- 2.Qf5#
- 2.Qg6#
- 2.Qe3#
- 1...cxd3!
- threat
- 1.Qxb6+?
- 1...Rc6
- 2.Sc7#
- 1...Sd6
- 2.Re5#
- 1...d6
- 2.Sf4#
- 2.Re5#
- 1...axb6!
- 1...Rc6
- 1.Rf5?
- Keys
- 1.Qb5!
- threat
- 2.Qxd7#
- 1...Rdxd5
- 2.Rh6#
- 1...Rxb5
- 2.Sc7#
- 1...Rcxd5
- 2.Rh6#
- 1...Rc6
- 2.Rh6#
- 1...Rc7
- 2.Sxc7#
- 2.Rh6#
- 1...Sd6
- 2.Re5#
- 1...d6
- 2.Sf4#
- threat
- 1.Qb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- R(b);SBLOCK,XS(E)::R(F)
- R(e);N_GUARD::S(E)
- R(e);SBLOCK,XS(E)::R(F)
- R(e);N_GUARD::S(E),XR(e)
- S(i);N_SPINS(f),P_PINS(E),SBLOCK::R1(F)
- P(j);N_SPINS(f),SBLOCK::S(E)
- Tries
- Try
- R(F);
- Threat
- B(H)
- Vars
- S(i);N_SPINS(f),P_PINS(E),SBLOCK::R1(F)
- P(j);N_SPINS(f),SBLOCK::S(E)
- Refutation
- S(i);P_PINS(E)
- Try
- R(G);CHECK,XS(f)
- Vars
- R(e);P_SPINR(e)::S(E)
- S(i);P_PINS(E),P_SPINS(i)::R1(F)
- Refutation
- P(h);XR(G)
- Try
- Q(C);
- Threat
- QAB1(C),XP(j)
- Vars
- R(b);SBLOCK,XS(E)::R(F)
- R(e);SBLOCK,XS(E)::R(F)
- S(i);N_SPINS(f),P_PINS(E),SBLOCK::R1(F)
- R(e);N_GUARD::S(E)
- R(e);N_GUARD::S(E),XR(e)
- P(j);N_SPINS(f),SBLOCK::S(E)
- Refutation
- R(e);N_SPINS(f)
- Try
- Q(C);XP(d)
- Threat
- DUALS(3)
- Vars
- R(b);P_SPINR(b),XS(E)::R(F)
- R(e);P_SPINR(e),XS(E)::R(F)
- Refutation
- R(e);XQ(C)
- Try
- Q(C);XR(b)
- Threat
- DUALS(6)
- Refutation
- P(d);XQ(C)
- Try
- Q(C);CHECK,XS(f)
- Vars
- R(e);P_SPINR(e)::S(E)
- S(i);P_PINS(E),P_SPINS(i)::R1(F)
- Refutation
- P(h);P_SPINP(h),XQ(C)
- Try
- Actual
- Q(C);
- Threat
- QAB1(C),XP(j)
- Vars
- R(b);SBLOCK,XS(E)::R(F)
- R(e);N_GUARD,XQ(C)::S(E)
- R(e);XS(E)::R(F)
- R(e);N_SPINS(f)::R(F)
- S(i);N_SPINS(f),P_PINS(E),SBLOCK::R1(F)
- P(j);N_SPINS(f),SBLOCK::S(E)
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).