MESON Chess Problem Database
Problem Display
PID: 242376 (1Q6/2pr3q/2P2R2/r2Pk3/3RN1P1/1N6/7P/BB1K4 w - - 0 1)
Morra, Juan Carlos
Problemas, 1961
#2
12 + 5
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qf5
- 2.Rxf5#
- 1...Qg8
- 2.Rf5#
- 1...Qxh2
- 2.Rf5#
- 1...Qh3
- 2.Rf5#
- 1...Qh4
- 2.Rf5#
- 1...Qh6
- 2.Rf5#
- 1...Qe7
- 2.Rf5#
- 1...Qg7
- 2.Rf5#
- 1...Qh8
- 2.Rf5#
- 1...Rb5
- 2.Rd2#
- 1...Qf5
- Tries
- 1.Sbd2?
- threat
- 2.Sf3#
- 2.Sc4#
- 1...Rxa1
- 2.Sf3#
- 1...Qf5
- 2.Rxf5#
- 1...Qh3
- 2.Sc4#
- 2.Rf5#
- 1...Ra3
- 2.Sc4#
- 1...Ra4
- 2.Sf3#
- 1...Rc5
- 2.Sf3#
- 1...Qxe4!
- threat
- 1.Sxa5?
- threat
- 2.Sc4#
- 2.Rd2#
- 1...Rxd5
- 2.Sc4#
- 1...Qf5
- 2.Rxf5#
- 1...Qh3
- 2.Sc4#
- 2.Rf5#
- 1...Qxe4!
- threat
- 1.Rd3+?
- 1...Kxe4
- 2.Sd2#
- 2.Qb4#
- 1...Rxa1!
- 1...Kxe4
- 1.Qxc7+?
- 1...Rd6
- 2.Qxd6#
- 1...Rxc7!
- 1...Rd6
- 1.Qe8+?
- 1...Qe7
- 2.Rf5#
- 2.Qh5#
- 1...Re7!
- 1...Qe7
- 1.Qg8?
- threat
- 2.Ra4#
- 2.Qe6#
- 1...Qxe4
- 2.Rxe4#
- 2.Qe6#
- 1...Qxg8
- 2.Rf5#
- 1...Qxh2
- 2.Rf5#
- 2.Qe6#
- 2.Qg5#
- 1...Rxa1
- 2.Qe6#
- 1...Raxd5
- 2.Rxd5#
- 2.Qe6#
- 1...Rdxd5
- 2.Rxd5#
- 2.Qe6#
- 1...Qf5
- 2.Rxf5#
- 1...Qh3
- 2.Rf5#
- 2.Qe6#
- 2.Qg5#
- 1...Qe7
- 2.Ra4#
- 2.Rf5#
- 2.Qg5#
- 1...Qf7
- 2.Qg5#
- 1...Ra2
- 2.Qe6#
- 1...Ra3
- 2.Qe6#
- 1...Ra4
- 2.Rxa4#
- 2.Qe6#
- 1...Rc5
- 2.Rc4#
- 2.Qe6#
- 1...Rd6
- 2.Ra4#
- 1...Re7
- 2.Ra4#
- 1...Rf7!
- threat
- 1.Sbd2?
- Keys
- 1.Qb5!
- threat
- 2.Ra4#
- 1...Qxe4
- 2.Rxe4#
- 1...Qxh2
- 2.Rf5#
- 1...Rxa1
- 2.d6#
- 1...Rxb5
- 2.Rd2#
- 1...Rxd5
- 2.Rxd5#
- 1...Qf5
- 2.Rxf5#
- 1...Qh3
- 2.Rf5#
- 1...Ra2
- 2.d6#
- 1...Ra3
- 2.d6#
- 1...Ra4
- 2.Rxa4#
- 2.d6#
- threat
- 1.Qb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 6
- Sets
- Q(e);N_GUARD::R1(K),XQ(e)
- Q(e);N_GUARD::R1(K)
- Q(e);N_GUARD,XP(D)::R1(K)
- R(a);N_GUARD::B(A)+R(F)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- R(a);P_PINB(B),XB(A)::S(E)
- Q(e);N_GUARD::R1(K),XQ(e)
- R(a);::S(E)
- Refutation
- Q(e);XS(G)
- Try
- S(E);XR(a)
- Threat
- DUALS(2)
- Vars
- R(d);P_PINR(F),XP(I)::S(E)
- Q(e);N_GUARD::R1(K),XQ(e)
- Refutation
- Q(e);XS(G)
- Try
- R(F);CHECK
- Refutation
- R(a);P_PINB(B),XB(A)
- Try
- Q(L);CHECK,XP(c)
- Vars
- R(d);N_GUARD,P_SPINR(d)::QAB1(L),XR(d)
- Refutation
- R(d);XQ(L)
- Try
- Q(L);CHECK,N_PINP(c)
- Refutation
- R(d);P_SPINR(d)
- Try
- Q(L);N_PINP(c)
- Threat
- DUALS(2)
- Vars
- Q(e);N_GUARD,XQ(L)::R1(K)
- R(a);P_PINB(B),XB(A)::QAR1(L)
- Q(e);N_GUARD::R1(K),XQ(e)
- Q(e);N_GUARD::QAR2(L)
- R(a);::QAR1(L)
- R(d);::B(A)+R(F)
- Refutation
- R(d);
- Try
- Actual
- Q(L);N_PINP(c)
- Threat
- B(A)+R(F)
- Vars
- Q(e);OGATE,XS(G)::B(A)+R(F),DCHECK,XQ(e)
- Q(e);N_GUARD,XP(D)::R1(K)
- R(a);N_GUARD,P_PINB(B),XB(A)::QAR(L)+P(I)
- R(a);N_GUARD,XQ(L)::B(A)+R(F)
- R(d);OGATE,P_PINR(F),P_SPINR(d),XP(I)::B(A)+R(F),DCHECK,XR(d)
- Q(e);N_GUARD::R1(K),XQ(e)
- Q(e);N_GUARD::R1(K)
- R(a);N_GUARD::QAR(L)+P(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).