MESON Chess Problem Database
Problem Display
PID: 242340 (1N6/2prN2R/b1RrkBp1/1n3pP1/B1p5/2bp4/8/3K1Q2 w - - 0 1)
Morra, Juan Carlos
Magyar Sakkelet, 1958
#2
9 + 11
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Be1
- 2.Qxe1#
- 1...d2
- 2.Qxc4#
- 1...f4
- 2.Qh3#
- 1...Be1
- Tries
- 1.Qe2+?
- 1...Be5
- 2.Qxe5#
- 1...dxe2+!
- 1...Be5
- 1.Qg2?
- threat
- 2.Qd5#
- 1...Rxe7
- 2.Rxe7#
- 1...Rxc6!
- threat
- 1.Qe1+?
- 1...Be5
- 2.Qxe5#
- 1...Bxe1!
- 1...Be5
- 1.Qh1?
- threat
- 2.Qd5#
- 1...Rxe7
- 2.Rxe7#
- 1...Rxc6!
- threat
- 1.Qf3?
- threat
- 2.Qd5#
- 1...Rxe7
- 2.Rxe7#
- 1...Rxc6!
- threat
- 1.Qe2+?
- Keys
- 1.Qxd3!
- threat
- 2.Qd5#
- 1...Rxc6
- 2.Qxd7#
- 1...Rxe7
- 2.Rxe7#
- 1...cxd3
- 2.Bb3#
- 1...Bd4
- 2.Qxc4#
- 1...Sd4
- 2.Qe3#
- threat
- 1.Qxd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 3
- Sets
- B(a);N_GUARD::QAR(B),XB(a)
- P(b);OGATE::QAB(B),XP(c)
- P(e);OGATEB::QAB(B)
- Tries
- Try
- Q(B);CHECK
- Vars
- B(a);N_GUARD,P_SPINB(a)::QAR1(B),XB(a)
- Refutation
- P(b);CHECK,XQ(B)
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- R(k);OGATE,XS(G)::R1(H),XR(k)
- Refutation
- R(g);N_SPINR(g),XR(E)
- Try
- Q(B);CHECK
- Vars
- B(a);N_GUARD,P_SPINB(a)::QAR1(B),XB(a)
- Refutation
- B(a);XQ(B)
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- R(k);OGATE,XS(G)::R1(H),XR(k)
- Refutation
- R(g);N_SPINR(g),XR(E)
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- R(k);OGATE,XS(G)::R1(H),XR(k)
- Refutation
- R(g);N_SPINR(g),XR(E)
- Try
- Actual
- Q(B);P_SPINQ(B),XP(b)
- Threat
- QAB1(B)
- Vars
- R(g);N_SPINR(g),XR(E)::QAB1(B),XR(k)
- R(k);OGATE,XS(G)::R1(H),XR(k)
- P(c);OGATEB,XQ(B)::B(C)
- B(a);N_PINQ(B)::QAB(B),XP(c)
- S(d);N_PINQ(B)::QAR(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).