MESON Chess Problem Database
Problem Display
PID: 205891 (R4B2/4PB1R/bbpk1P2/4q1r1/2Pr2NN/4Q1nK/8/8 w - - 0 1)
Speakman, Thomas
American Chess Bulletin, 1912
#2
11 + 8
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Kc5
- 2.Qa3#
- 1...Qxe7
- 2.Qxe7#
- 1...Bd8
- 2.exd8Q#
- 1...Kc5
- Tries
- 1.Rd8+?
- 1...Kc5
- 2.Qa3#
- 1...Bxd8
- 2.exd8Q#
- 1...Kc7!
- 1...Kc5
- 1.Qxe5+?
- 1...Kd7
- 2.Be6#
- 2.Be8#
- 2.e8Q#
- 2.e8B#
- 1...Rxe5!
- 1...Kd7
- 1.e8Q+?
- 1...Qe7
- 2.Q3xe7#
- 2.Q8xe7#
- 1...Kc7!
- 1...Qe7
- 1.e8B+?
- 1...Qe7
- 2.Qxe7#
- 1...Kc7!
- 1...Qe7
- 1.e8R+?
- 1...Kd7
- 2.Be6#
- 1...Qe7
- 2.Qxe7#
- 1...Kc7!
- 1...Kd7
- 1.Rd8+?
- Keys
- 1.Be6!
- threat
- 2.e8Q#
- 2.e8R#
- 1...Kc5
- 2.Qa3#
- 1...Kxe6
- 2.e8Q#
- 2.e8R#
- 1...Kc7
- 2.e8S#
- 1...Qxe3
- 2.e8Q#
- 2.e8R#
- 1...Rxc4
- 2.e8Q#
- 2.e8R#
- 1...Rdxg4
- 2.e8Q#
- 2.e8R#
- 1...Rgxg4
- 2.e8Q#
- 2.e8R#
- 1...Bxc4
- 2.e8Q#
- 2.e8R#
- 1...Qf4
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qe4
- 2.e8Q#
- 2.e8R#
- 1...Qa5
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qb5
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qc5
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qd5
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Qf5
- 2.e8Q#
- 2.e8S#
- 2.e8B#
- 2.e8R#
- 1...Rd1
- 2.e8Q#
- 2.e8R#
- 1...Rd2
- 2.e8Q#
- 2.e8R#
- 1...Rd3
- 2.e8Q#
- 2.e8R#
- 1...Re4
- 2.e8Q#
- 2.e8R#
- 1...Rf4
- 2.e8Q#
- 2.e8R#
- 1...Rd5
- 2.e8Q#
- 2.e8R#
- 1...Rf5
- 2.e8Q#
- 2.e8R#
- 1...Rh5
- 2.e8Q#
- 2.e8R#
- 1...Rg6
- 2.Qxe5#
- 2.e8Q#
- 2.e8R#
- 1...Rg7
- 2.Qxe5#
- 1...Rg8
- 2.Qxe5#
- 1...Bb5
- 2.e8Q#
- 2.e8R#
- 1...Bb7
- 2.e8Q#
- 2.e8R#
- 1...Bc8
- 2.e8Q#
- 2.e8R#
- 1...Ba5
- 2.e8Q#
- 2.e8R#
- 1...Bc5
- 2.e8Q#
- 2.e8R#
- 1...Ba7
- 2.e8Q#
- 2.e8R#
- 1...Bc7
- 2.e8Q#
- 2.e8R#
- 1...Bd8
- 2.exd8S#
- 1...Sf1
- 2.e8Q#
- 2.e8R#
- 1...Sh1
- 2.e8Q#
- 2.e8R#
- 1...Se2
- 2.e8Q#
- 2.e8R#
- 1...Se4
- 2.e8Q#
- 2.e8R#
- 1...Sf5
- 2.Qxe5#
- 1...Sh5
- 2.e8Q#
- 2.e8R#
- threat
- 1.Be6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- K(h);P_SPINR(b),S_FLIGHT::QAB(A)
- Q(c);OGATE,P_SPINQ(c),XP(G)::QAB1(A),XQ(c)
- B(f);OGATE::PXB(f)=Q
- Tries
- Try
- R(J);CHECK
- Vars
- K(h);P_SPINR(b),S_FLIGHT::QAB(A)
- B(f);OGATE,XR(J)::PXB(f)=Q
- Refutation
- K(h);S_FLIGHT
- Try
- Q(A);CHECK,XQ(c)
- Refutation
- R(d);XQ(A)
- Try
- P(G);CHECK
- Refutation
- K(h);S_FLIGHT
- Try
- P(G);CHECK
- Vars
- Q(c);OGATE,P_SPINQ(c)::QAB1(A),XQ(c)
- Refutation
- K(h);S_FLIGHT
- Try
- P(G);CHECK
- Vars
- K(h);P-FLIGHT::R(I)+B(H),DCHECK
- Q(c);OGATE,P_SPINQ(c)::QAB1(A),XQ(c)
- Refutation
- K(h);S_FLIGHT
- Try
- Actual
- B(H);
- Threat
- P=Q
- Vars
- K(h);P_SPINR(b),S_FLIGHT::QAB(A)
- K(h);P-FLIGHT,P_SPINQ(c),XB(H)::P=Q
- K(h);S_FLIGHT::P=S
- Q(c);XQ(A)::P=Q
- R(b);XP(C)::P=Q
- R(b);XS(D)::P=Q
- R(d);XS(D)::P=Q
- B(e);XP(C)::P=Q
- Q(c);::P=Q
- R(b);::P=Q
- R(d);::P=Q
- R(d);P_PINS(E)::P=Q
- R(d);N_GUARD::QAB1(A),XQ(c)
- B(e);::P=Q
- B(f);::P=Q
- B(f);SBLOCK::P=Q
- B(f);OGATE::PXB(f)=S
- S(a);::P=Q
- S(a);S_CUTR(d)::QAB1(A),XQ(c)
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).