MESON Chess Problem Database
Problem Display
PID: 168478 (4bR2/8/1b1R4/4Npq1/1pp1k1p1/r4p2/5P1B/QN1B3K w - - 0 1)
Petite, Efren
Problemas, 1955
#2
9 + 10
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qd2
- 2.Sxd2#
- 1...Qh4
- 2.Sd2#
- 1...Qf6
- 2.Sd2#
- 1...Qe7
- 2.Sd2#
- 1...Qd8
- 2.Sd2#
- 1...Qh5
- 2.Sd2#
- 1...Qg6
- 2.Sd2#
- 1...Qg7
- 2.Sd2#
- 1...Qg8
- 2.Sd2#
- 1...Rxa1
- 2.Bc2#
- 1...Re3
- 2.Sd2#
- 1...Ra4
- 2.Bc2#
- 1...Ra5
- 2.Bc2#
- 1...Ra6
- 2.Bc2#
- 1...Ra7
- 2.Bc2#
- 1...Ra8
- 2.Bc2#
- 1...Bd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Ba5
- 2.Rd4#
- 2.Qd4#
- 1...Bc7
- 2.Rd4#
- 2.Qd4#
- 1...Bd8
- 2.Rd4#
- 2.Qd4#
- 1...b3
- 2.Sc3#
- 1...c3
- 2.Bc2#
- 1...f4
- 2.Sd2#
- 1...Qd2
- Tries
- 1.Sc3+?
- 1...bxc3
- 2.Bc2#
- 1...Rxc3!
- 1...bxc3
- 1.Sxf3?
- threat
- 2.Sxg5#
- 2.Qe5#
- 1...Rxa1
- 2.Sxg5#
- 1...Rxf3
- 2.Qe5#
- 1...Bxf2
- 2.Qe5#
- 1...gxf3
- 2.Qe5#
- 1...Bd4
- 2.Rxd4#
- 2.Qxd4#
- 1...g3
- 2.Qe5#
- 1...Qc1
- 2.Rxe8#
- 2.Qe5#
- 1...Qd2
- 2.Sbxd2#
- 2.Sfxd2#
- 2.Rxe8#
- 2.Qe5#
- 1...Qe3
- 2.Rxe8#
- 2.Qe5#
- 1...Qh4
- 2.Sbd2#
- 2.Sfd2#
- 2.Qe5#
- 1...Qf6
- 2.Sbd2#
- 2.Sfd2#
- 1...Qh6
- 2.Qe5#
- 1...Qe7
- 2.Sbd2#
- 2.Sfd2#
- 1...Qd8
- 2.Sbd2#
- 2.Sfd2#
- 2.Qe5#
- 1...Qh5
- 2.Sbd2#
- 2.Sfd2#
- 2.Qe5#
- 1...Qg6
- 2.Sbd2#
- 2.Sfd2#
- 2.Qe5#
- 1...Qg7
- 2.Sbd2#
- 2.Sfd2#
- 1...Qg8
- 2.Sbd2#
- 2.Sfd2#
- 2.Qe5#
- 1...Rc3
- 2.Sxg5#
- 1...Ra5
- 2.Sxg5#
- 1...Be3
- 2.Qe5#
- 1...Bd8
- 2.Rd4#
- 2.Qd4#
- 2.Qe5#
- 1...c3
- 2.Sxg5#
- 1...f4
- 2.Sbd2#
- 2.Sfd2#
- 2.Sxg5#
- 1...Qf4!
- threat
- 1.Sf7?
- threat
- 2.Sxg5#
- 2.Qe5#
- 1...Rxa1
- 2.Sxg5#
- 2.Bc2#
- 1...Bxf2
- 2.Qe5#
- 1...Bxf7
- 2.Qe5#
- 1...Bd4
- 2.Rxd4#
- 2.Qxd4#
- 1...g3
- 2.Qe5#
- 1...f4
- 2.Sxg5#
- 1...Qc1
- 2.Rxe8#
- 2.Qe5#
- 1...Qd2
- 2.Sxd2#
- 2.Rxe8#
- 2.Qe5#
- 1...Qe3
- 2.Rxe8#
- 2.Qe5#
- 1...Qh4
- 2.Sd2#
- 2.Qe5#
- 1...Qf6
- 2.Sd2#
- 1...Qh6
- 2.Qe5#
- 1...Qe7
- 2.Sd2#
- 1...Qd8
- 2.Sd2#
- 2.Qe5#
- 1...Qh5
- 2.Sd2#
- 2.Rxe8#
- 2.Qe5#
- 1...Qg6
- 2.Sd2#
- 2.Qe5#
- 1...Qg7
- 2.Sd2#
- 1...Qg8
- 2.Sd2#
- 2.Qe5#
- 1...Rc3
- 2.Sxg5#
- 1...Ra5
- 2.Sxg5#
- 2.Bc2#
- 1...Be3
- 2.Qe5#
- 1...Bd8
- 2.Rd4#
- 2.Qd4#
- 2.Qe5#
- 1...c3
- 2.Sxg5#
- 2.Bc2#
- 1...Qf4!
- threat
- 1.Sc3+?
- Keys
- 1.Sd7!
- threat
- 2.Qe5#
- 1...Rxa1
- 2.Bc2#
- 1...Bd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Qf4
- 2.Sf6#
- 1...Qf6
- 2.Sd2#
- 2.Sxf6#
- 1...Qe7
- 2.Sd2#
- 1...Qg7
- 2.Sd2#
- 1...Rc3
- 2.Qa8#
- 1...Ra5
- 2.Bc2#
- 1...c3
- 2.Bc2#
- 1...f4
- 2.Sd2#
- threat
- 1.Sd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 13
- Sets
- Q(h);N_GUARD::S(B),XQ(h)
- Q(h);N_GUARD,P_PINB(F)::S(B)
- Q(h);N_GUARD::S(B)
- R(a);N_GUARD,XQ(A)::B(C)
- R(a);S_CUTQ(h)::S(B)
- R(a);N_GUARD::B(C)
- P(c);N_GUARD,S_CUTR(a)::S(B)
- P(d);S_CUTR(a)::B(C)
- P(g);S_CUTQ(h)::S(B)
- Tries
- Try
- S(B);CHECK
- Vars
- P(c);XS(B)::B(C)
- Refutation
- R(a);XS(B)
- Try
- S(G);XP(b)
- Threat
- DUALS(2)
- Vars
- R(a);XQ(A)::S(G),XQ(h)
- R(a);XS(G)::QAR1(A)
- B(i);XP(E)::QAR1(A)
- P(f);XS(G)::QAR1(A)
- P(f);::QAR1(A)
- Q(h);P_PINB(F)::QAR1(A)
- R(a);::S(G),XQ(h)
- B(i);::QAR1(A)
- P(d);::S(G),XQ(h)
- Refutation
- Q(h);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(i);XP(E)::QAR1(A)
- B(j);XS(G)::QAR1(A)
- P(f);::QAR1(A)
- P(g);::S(G),XQ(h)
- Q(h);N_GUARD::S(B)
- Q(h);P_PINB(F)::QAR1(A)
- R(a);::S(G),XQ(h)
- B(i);::QAR1(A)
- Refutation
- Q(h);
- Try
- Actual
- S(G);
- Threat
- QAR1(A)
- Vars
- R(a);N_GUARD,XQ(A)::B(C)
- Q(h);N_GUARD::S(G)
- Q(h);N_GUARD::S(B)
- R(a);OGATE::QAB(A)
- R(a);N_GUARD::B(C)
- P(d);S_CUTR(a)::B(C)
- P(g);S_CUTQ(h)::S(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).