MESON Chess Problem Database
Problem Display
PID: 222643 (4Rqn1/Q2p4/NKp4p/1p5P/1B1k1PpN/4p3/b3PnB1/2R5 w - - 0 1)
Hopkins, F O'Neill
English Mechanic and World of Science, 1883
(First published on Fri Oct 19 1883)
#2
11 + 11
| 6490 | yacpdb | 2020 |
| 15239 | Valois Notebooks | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxb4
- 2.Sf5#
- 1...Qc5+
- 2.Bxc5#
- 1...Qd6
- 2.Sf5#
- 1...Qe7
- 2.Sf5#
- 1...Qg7
- 2.Sf5#
- 2.Bc5#
- 1...Qxf4
- 2.Bc5#
- 1...Qf5
- 2.Sxf5#
- 1...Qf6
- 2.Bc5#
- 1...Qf7
- 2.Bc5#
- 1...Qxe8
- 2.Sf5#
- 2.Bc5#
- 1...Bc4
- 2.Bc3#
- 1...Bf7
- 2.Sf5#
- 1...Sf6
- 2.Sf5#
- 1...Se7
- 2.Bc5#
- 1...d6
- 2.Kxc6#
- 1...Qxb4
- Tries
- 1.Ka5+?
- 1...Qc5
- 2.Sf5#
- 2.Bxc5#
- 2.Qxc5#
- 1...c5!
- 1...Qc5
- 1.Kb7+?
- 1...Qc5
- 2.Sf5#
- 2.Bxc5#
- 2.Qxc5#
- 1...c5!
- 1...Qc5
- 1.Kc7+?
- 1...Qc5
- 2.Sf5#
- 2.Bxc5#
- 2.Qxc5#
- 1...c5!
- 1...Qc5
- 1.Sf3+?
- 1...Kd5
- 2.Sc7#
- 2.Re5#
- 1...gxf3!
- 1...Kd5
- 1.Bxf8?
- threat
- 2.Sf5#
- 2.Bc5#
- 1...c5
- 2.Sf5#
- 2.Bxc5#
- 1...Bb1
- 2.Bc5#
- 2.Qxd7#
- 1...Be6
- 2.Bc5#
- 1...Sd3
- 2.Sf5#
- 1...Se7
- 2.Bg7#
- 1...d6
- 2.Kxc6#
- 2.Sf5#
- 1...Se4!
- threat
- 1.Re4+?
- 1...Kd5
- 2.Sc7#
- 1...Sxe4!
- 1...Kd5
- 1.Rxf8?
- threat
- 2.Sf5#
- 2.Bc5#
- 1...c5
- 2.Sf5#
- 2.Bxc5#
- 1...Bb1
- 2.Bc5#
- 2.Qxd7#
- 1...Be6
- 2.Bc5#
- 1...Sd3
- 2.Sf5#
- 1...Se7
- 2.Bc5#
- 1...d6
- 2.Kxc6#
- 2.Sf5#
- 1...Se4!
- threat
- 1.Qxd7+?
- 1...Qd6
- 2.Sf5#
- 2.Bc5#
- 1...Bd5!
- 1...Qd6
- 1.Ka5+?
- Keys
- 1.Sc7!
- 1...Qc5+
- 2.Bxc5#
- 1...Qxb4
- 2.Sf5#
- 1...Qxf4
- 2.Bc5#
- 1...Qxe8
- 2.Sf5#
- 2.Bc5#
- 1...c5
- 2.Sxb5#
- 1...Qd6
- 2.Sf5#
- 1...Qe7
- 2.Sf5#
- 1...Qg7
- 2.Sf5#
- 2.Bc5#
- 1...Qf5
- 2.Sxf5#
- 1...Qf6
- 2.Bc5#
- 1...Qf7
- 2.Bc5#
- 1...Bb1
- 2.Qa1#
- 1...Bb3
- 2.Qa1#
- 1...Bc4
- 2.Bc3#
- 2.Qa1#
- 1...Bd5
- 2.Qa1#
- 1...Be6
- 2.Qa1#
- 1...Bf7
- 2.Sf5#
- 2.Qa1#
- 1...Sd1
- 2.Re4#
- 1...Sh1
- 2.Re4#
- 1...Sd3
- 2.Re4#
- 1...Sh3
- 2.Re4#
- 1...Se4
- 2.Rxe4#
- 1...Sf6
- 2.Sf5#
- 1...Se7
- 2.Bc5#
- 1...g3
- 2.Sf3#
- 1...d5
- 2.Se6#
- 1...d6
- 2.Kxc6#
- 1...Qc5+
- 1.Sc7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 12
- REMOVED MATES = 2
- Sets
- Q(j);N_GUARD,XB(D)::S(F)
- Q(j);CHECK,N_GUARD::B(D),XQ(j)
- Q(j);N_GUARD::S(F)
- Q(j);N_GUARD,XP(E)::B(D)
- Q(j);N_GUARD::S(F),XQ(j)
- Q(j);N_GUARD::B(D)
- B(a);SBLOCK::B(D)
- B(a);S_CUTQ(j)::S(F)
- S(k);S_CUTQ(j)::S(F)
- S(k);S_CUTQ(j)::B(D)
- P(i);::QAB(J)+K(I),XP(g)
- Tries
- Try
- K(I);CHECK,S_FLIGHT
- Refutation
- P(g);P_SPINP(g)
- Try
- K(I);CHECK,P-FLIGHT
- Refutation
- P(g);P_SPINP(g)
- Try
- K(I);CHECK,S_FLIGHT
- Refutation
- P(g);P_SPINP(g)
- Try
- S(F);CHECK
- Refutation
- P(e);XS(F)
- Try
- B(D);XQ(j)
- Threat
- DUALS(2)
- Vars
- B(a);::B(D)
- S(b);::S(F)
- S(k);N_GUARD::B(D)
- Refutation
- S(b);
- Try
- R(K);CHECK
- Vars
- K(d);P-FLIGHT::S(H)
- Refutation
- S(b);XR(K)
- Try
- R(K);XQ(j)
- Threat
- DUALS(2)
- Vars
- B(a);::B(D)
- S(b);::S(F)
- S(k);::B(D)
- Refutation
- S(b);
- Try
- Q(J);CHECK,XP(i)
- Refutation
- B(a);P_SPINB(a)
- Try
- Actual
- S(H);
- Vars
- Q(j);CHECK,N_GUARD::B(D),XQ(j)
- Q(j);N_GUARD,XB(D)::S(F)
- Q(j);N_GUARD,XP(E)::B(D)
- P(g);N_GUARD::S(H),XP(f)
- Q(j);N_GUARD::S(F)
- Q(j);N_GUARD::S(F),XQ(j)
- Q(j);N_GUARD::B(D)
- B(a);OGATE::QAB(J)
- S(b);N_GUARD::R1(K)
- S(b);N_GUARD::R1(K),XS(b)
- S(k);S_CUTQ(j)::S(F)
- S(k);S_CUTQ(j)::B(D)
- P(e);N_GUARD::S(F)
- P(i);N_GUARD,S_CUTB(a)::S(H)
- P(i);::QAB(J)+K(I),XP(g)
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).