MESON Chess Problem Database
Problem Display
PID: 184219 (6B1/8/5B1Q/1p1PP3/1P1kq1P1/3p1p2/1P1NbP2/4R2K w - - 0 1)
Schiffmann, Israel Abraham
The Observer, 1928
(First published on Sun Mar 4 1928)
#2
12 + 6
| 15239 | Valois Notebooks | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qxd5
- 2.Qe3#
- 1...Qf5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qe3
- 2.Qxe3#
- 2.fxe3#
- 1...Qf4
- 2.Qxf4#
- 1...Qxg4
- 2.Qe3#
- 1...Qxe5
- 2.Qe3#
- 2.Qf4#
- 1...Bd1
- 2.Rxe4#
- 1...Bf1
- 2.Rxe4#
- 1...Qxd5
- Tries
- 1.Kg1?
- 1...Qxd5
- 2.Qe3#
- 1...Qxe5
- 2.Qe3#
- 2.Qf4#
- 1...Qf5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qh7
- 2.Qe3#
- 1...Qe3
- 2.Qxe3#
- 2.fxe3#
- 1...Qf4
- 2.Qxf4#
- 1...Bd1
- 2.Rxe4#
- 1...Bf1
- 2.Rxe4#
- 1...Qxg4+!
- 1...Qxd5
- 1.Kh2?
- 1...Qf4+
- 2.Qxf4#
- 1...Qxe5+
- 2.Qf4#
- 1...Qxd5
- 2.Qe3#
- 1...Qxg4
- 2.Qe3#
- 1...Qf5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qe3
- 2.Qxe3#
- 2.fxe3#
- 1...Bd1
- 2.Rxe4#
- 1...Bf1
- 2.Rxe4#
- 1...Qh7!
- 1...Qf4+
- 1.Be7?
- 1...Kxe5
- 2.Qf6#
- 1...Qxd5
- 2.Qe3#
- 1...Qxg4
- 2.Qe3#
- 1...Qxe5
- 2.Bc5#
- 2.Qb6#
- 1...Qf5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qe3
- 2.Qxe3#
- 1...Qf4
- 2.Qxf4#
- 1...Bd1
- 2.Rxe4#
- 1...Bf1
- 2.Rxe4#
- 1...Qh7!
- 1...Kxe5
- 1.Bg7?
- threat
- 2.Qb6#
- 1...Qxd5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qh7!
- threat
- 1.Bd8?
- 1...Kxe5
- 2.Qf6#
- 1...Qxd5
- 2.Qe3#
- 1...Qxg4
- 2.Qe3#
- 1...Qxe5
- 2.Bb6#
- 2.Qb6#
- 1...Qf5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qe3
- 2.Qxe3#
- 1...Qf4
- 2.Qxf4#
- 1...Bd1
- 2.Rxe4#
- 1...Bf1
- 2.Rxe4#
- 1...Qh7!
- 1...Kxe5
- 1.Bh8?
- threat
- 2.Qb6#
- 1...Qxd5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qh7!
- threat
- 1.Be6?
- 1...Qxd5
- 2.Qe3#
- 1...Qxg4
- 2.Qe3#
- 1...Qxe5
- 2.Qe3#
- 2.Qf4#
- 1...Qf5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qe3
- 2.Qxe3#
- 2.fxe3#
- 1...Qf4
- 2.Qxf4#
- 1...Bd1
- 2.Rxe4#
- 1...Bf1
- 2.Rxe4#
- 1...Qh7!
- 1...Qxd5
- 1.Bf7?
- 1...Qxd5
- 2.Qe3#
- 1...Qxg4
- 2.Qe3#
- 1...Qxe5
- 2.Qe3#
- 2.Qf4#
- 1...Qf5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qe3
- 2.Qxe3#
- 2.fxe3#
- 1...Qf4
- 2.Qxf4#
- 1...Bd1
- 2.Rxe4#
- 1...Bf1
- 2.Rxe4#
- 1...Qh7!
- 1...Qxd5
- 1.Qg5?
- 1...Qxd5
- 2.Qe3#
- 1...Qxg4
- 2.Qe3#
- 2.Qxg4#
- 2.e6#
- 1...Qxe5
- 2.Bxe5#
- 2.Qe3#
- 2.Qf4#
- 2.Qxe5#
- 1...Qf5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qe3
- 2.Qxe3#
- 2.fxe3#
- 1...Qf4
- 2.Qxf4#
- 1...Bd1
- 2.Rxe4#
- 1...Bf1
- 2.Rxe4#
- 1...Qh7+!
- 1...Qxd5
- 1.d6?
- threat
- 2.Sb3#
- 1...Qxg4
- 2.Qe3#
- 1...Qxe5
- 2.Qe3#
- 2.Qf4#
- 1...Qd5
- 2.Qe3#
- 1...Qf5
- 2.Qe3#
- 1...Qc6
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qb7
- 2.Qe3#
- 1...Qa8
- 2.Qe3#
- 1...Qe3
- 2.Qxe3#
- 2.fxe3#
- 1...Qf4
- 2.Qxf4#
- 1...Bd1
- 2.Rxe4#
- 1...Qh7!
- threat
- 1.Kg1?
- Keys
- 1.Bh4!
- 1...Kxe5
- 2.Qf6#
- 1...Qxd5
- 2.Qe3#
- 1...Qxg4
- 2.Qe3#
- 1...Qxe5
- 2.Qb6#
- 1...Qf5
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qh7
- 2.Qe3#
- 1...Qe3
- 2.Qxe3#
- 1...Qf4
- 2.Qxf4#
- 1...Bd1
- 2.Rxe4#
- 1...Bf1
- 2.Rxe4#
- 1...Kxe5
- 1.Bh4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- Q(e);OGATEB::QAR2(K),XQ(e)
- Q(e);N_GUARD,XP(G)::QAB1(K)
- B(a);OGATE::R1(A),XQ(e)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- Q(e);N_GUARD,P_PINP(G)::QAB1(K)
- Q(e);OGATEB::QAR2(K),XQ(e)
- B(a);OGATE::R1(A),XQ(e)
- Refutation
- Q(e);CHECK,XP(G)
- Try
- K(B);P-FLIGHT
- Vars
- Q(e);CHECK,OGATEB::QAR2(K),XQ(e)
- Q(e);CHECK,OGATEB,P_SPINQ(e),XP(I)::QAR2(K)
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD,XP(G)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- B(a);OGATE::R1(A),XQ(e)
- Refutation
- Q(e);P_PINQ(K)
- Try
- B(J);
- Vars
- K(d);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD,XP(G)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- Q(e);N_GUARD::QAB1(K),XQ(e)
- Q(e);OGATEB::QAR2(K),XQ(e)
- B(a);OGATE::R1(A),XQ(e)
- Refutation
- Q(e);P_PINQ(K)
- Try
- B(J);
- Threat
- QAB(K)
- Vars
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- Refutation
- Q(e);P_PINQ(K)
- Try
- B(J);
- Vars
- K(d);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD,XP(G)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- Q(e);N_GUARD::QAB1(K),XQ(e)
- Q(e);OGATEB::QAR2(K),XQ(e)
- B(a);OGATE::R1(A),XQ(e)
- Refutation
- Q(e);P_PINQ(K)
- Try
- B(J);
- Threat
- QAB(K)
- Vars
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- Refutation
- Q(e);P_PINQ(K)
- Try
- B(L);
- Vars
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD,XP(G)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- Q(e);OGATEB::QAR2(K),XQ(e)
- B(a);OGATE::R1(A),XQ(e)
- Refutation
- Q(e);P_PINQ(K)
- Try
- B(L);
- Vars
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD,XP(G)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- Q(e);OGATEB::QAR2(K),XQ(e)
- B(a);OGATE::R1(A),XQ(e)
- Refutation
- Q(e);P_PINQ(K)
- Try
- Q(K);
- Vars
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- Q(e);OGATEB::QAR2(K),XQ(e)
- B(a);OGATE::R1(A),XQ(e)
- Refutation
- Q(e);CHECK
- Try
- P(H);
- Threat
- S(D)
- Vars
- Q(e);N_GUARD,XP(G)::QAB1(K)
- Q(e);N_GUARD::QAB1(K)
- Q(e);OGATEB::QAR2(K),XQ(e)
- B(a);OGATE::R1(A),XQ(e)
- Refutation
- Q(e);P_PINQ(K)
- Try
- Actual
- B(J);
- Vars
- K(d);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
- Q(e);N_GUARD,XP(H)::QAB1(K)
- Q(e);N_GUARD,XP(G)::QAB1(K)
- Q(e);SBLOCK,XP(I)::QAB(K)
- Q(e);N_GUARD::QAB1(K)
- Q(e);N_GUARD::QAB1(K),XQ(e)
- Q(e);OGATEB::QAR2(K),XQ(e)
- B(a);OGATE::R1(A),XQ(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).