MESON Chess Problem Database
Problem Display
PID: 242380 (3r4/1N2pR2/8/4k3/2B1n2R/4Bp1r/Q1p1p3/2KbN3 w - - 0 1)
Morra, Juan Carlos
Schakend Nederland, 1962
#2
8 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Sxf3#
- 1...Rh2
- 2.Sxf3#
- 1...Rxh4
- 2.Sxf3#
- 1...Rd3
- 2.Sxd3#
- 1...Rd4
- 2.Bf4#
- 1...Ra8
- 2.Sd3#
- 1...Rb8
- 2.Sd3#
- 1...Rc8
- 2.Sd3#
- 1...Re8
- 2.Sd3#
- 1...Rf8
- 2.Sd3#
- 1...Rg8
- 2.Sd3#
- 1...Rh8
- 2.Sd3#
- 1...Sg3
- 2.Sxf3#
- 1...Sd6
- 2.Sd3#
- 2.Bd4#
- 2.Qa1#
- 2.Qb2#
- 1...Rh1
- Tries
- 1.Be6?
- threat
- 2.Rf5#
- 1...Rd5
- 2.Qxd5#
- 1...Rf8
- 2.Sd3#
- 2.Qd5#
- 1...Sg3
- 2.Sxf3#
- 1...Sd6
- 2.Sd3#
- 2.Bd4#
- 2.Qd5#
- 1...Sf6!
- threat
- 1.Rhf4?
- threat
- 2.R4f5#
- 2.R7f5#
- 2.Rxe7#
- 1...Rd5
- 2.Rxe7#
- 1...Rh5
- 2.Sxf3#
- 2.Rxe7#
- 1...Rh6
- 2.Sxf3#
- 2.R4f5#
- 2.R7f5#
- 1...Rh7
- 2.Sxf3#
- 2.R4f5#
- 2.R7f5#
- 1...Rd6
- 2.R4f5#
- 2.R7f5#
- 1...Rd7
- 2.R4f5#
- 2.R7f5#
- 1...Re8
- 2.Sd3#
- 2.R4f5#
- 2.R7f5#
- 1...Rf8
- 2.Sd3#
- 2.R4f5#
- 2.Rxe7#
- 1...Sd2
- 2.R7f5#
- 2.Rxe7#
- 1...Sf2
- 2.R7f5#
- 2.Rxe7#
- 1...Sc3
- 2.R7f5#
- 2.Rxe7#
- 1...Sg3
- 2.Sxf3#
- 2.Rxe7#
- 1...Sc5
- 2.R7f5#
- 1...Sg5
- 2.R7f5#
- 1...Sd6
- 2.Sd3#
- 2.Bd4#
- 2.Rxe7#
- 2.Qa1#
- 2.Qb2#
- 1...Sf6
- 2.Rxe7#
- 1...e6!
- threat
- 1.Rh5+?
- 1...Rxh5
- 2.Sxf3#
- 1...Sg5!
- 1...Rxh5
- 1.Qa1+?
- 1...Rd4
- 2.Sd3#
- 2.Bxd4#
- 2.Bf4#
- 2.Qxd4#
- 1...Sc3!
- 1...Rd4
- 1.Qb2+?
- 1...Rd4
- 2.Sd3#
- 2.Bxd4#
- 2.Bf4#
- 2.Qxd4#
- 1...Sc3!
- 1...Rd4
- 1.Qxc2?
- threat
- 2.Rxe4#
- 2.Qxe4#
- 1...Rxh4
- 2.Sxf3#
- 1...Sc3
- 2.Rf5#
- 2.Qf5#
- 1...Rd3
- 2.Sxd3#
- 1...Rd4
- 2.Bf4#
- 1...Sd2
- 2.Rf5#
- 2.Qf5#
- 1...Sf2
- 2.Rf5#
- 2.Qf5#
- 1...Sg3
- 2.Sxf3#
- 1...Sc5
- 2.Rf5#
- 2.Qf5#
- 1...Sg5
- 2.Rf5#
- 2.Qf5#
- 1...Sd6
- 2.Sd3#
- 2.Bd4#
- 2.Qb2#
- 2.Qc3#
- 1...Sf6
- 2.Rxe7#
- 1...Bxc2!
- threat
- 1.Qa5+?
- 1...Rd5
- 2.Qxd5#
- 1...Sc5!
- 1...Rd5
- 1.Be6?
- Keys
- 1.Bd3!
- threat
- 2.Rxe4#
- 1...Rxh4
- 2.Sxf3#
- 1...Rxd3
- 2.Sxd3#
- 1...Rd4
- 2.Bf4#
- 1...Sd2
- 2.Rf5#
- 1...Sf2
- 2.Rf5#
- 1...Sc3
- 2.Rf5#
- 1...Sg3
- 2.Sxf3#
- 1...Sc5
- 2.Rf5#
- 1...Sg5
- 2.Rf5#
- 1...Sd6
- 2.Bd4#
- 1...Sf6
- 2.Rxe7#
- threat
- 1.Bd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 9
- Sets
- R(e);N_GUARD::S(B),XP(d)
- R(e);N_GUARD,XR(F)::S(B),XP(d)
- R(i);N_GUARD::S(B),XR(i)
- R(i);SBLOCK::B(D)
- R(i);N_GUARD::S(B)
- S(f);S_CUTR(e)::S(B),XP(d)
- Tries
- Try
- B(E);
- Threat
- R1(H)
- Vars
- R(i);N_GUARD::QAR1(C),XR(i)
- S(f);S_CUTR(e)::S(B),XP(d)
- Refutation
- S(f);
- Try
- R(F);
- Threat
- DUALS(3)
- Vars
- R(i);::R(H),XP(h)
- S(f);::R1(H)
- S(f);::R(H),XP(h)
- Refutation
- P(h);
- Try
- R(F);CHECK
- Vars
- R(e);XR(F)::S(B),XP(d)
- Refutation
- S(f);P_SPINS(f)
- Try
- Q(C);CHECK
- Refutation
- S(f);P_SPINS(f)
- Try
- Q(C);CHECK
- Refutation
- S(f);P_SPINS(f)
- Try
- Q(C);XP(b)
- Threat
- DUALS(2)
- Vars
- R(e);N_GUARD,XR(F)::S(B),XP(d)
- R(i);N_GUARD::S(B),XR(i)
- R(i);SBLOCK::B(D)
- S(f);S_CUTR(e)::S(B),XP(d)
- S(f);SBLOCK::R(H),XP(h)
- Refutation
- B(a);XQ(C)
- Try
- Q(C);CHECK
- Vars
- R(i);N_GUARD,P_SPINR(i)::QAR1(C),XR(i)
- Refutation
- S(f);P_SPINS(f)
- Try
- Actual
- B(E);
- Threat
- R1(F),XS(f)
- Vars
- R(e);N_GUARD,XR(F)::S(B),XP(d)
- R(i);XB(E)::S(B),XR(i)
- R(i);SBLOCK::B(D)
- S(f);::R1(H)
- S(f);S_CUTR(e)::S(B),XP(d)
- S(f);S_CUTR(i)::B(D)
- S(f);SBLOCK::R(H),XP(h)
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).