MESON Chess Problem Database
Problem Display
PID: 210544 (Q2b4/n7/5PK1/8/P1kBN1pp/1p1NPp1r/1p5q/1B1R2nb w - - 0 1)
Bernard, Henry D'Oyly
The Observer, 1921
(First published on Sun Feb 27 1921)
#2
10 + 12
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qg3
- 2.Sd2#
- 1...Qf4
- 2.Sd2#
- 1...Qe5
- 2.Sd2#
- 1...Qd6
- 2.Sd2#
- 2.Sxd6#
- 1...Qc7
- 2.Sd2#
- 1...Qb8
- 2.Sd2#
- 1...Qc2
- 2.Sd6#
- 1...Qd2
- 2.Sxd2#
- 2.Sd6#
- 1...Qe2
- 2.Sd6#
- 1...Qf2
- 2.Sd6#
- 1...Qg2
- 2.Sd6#
- 1...Rg3
- 2.Sd6#
- 1...Bg2
- 2.Sd2#
- 1...Ba5
- 2.Qg8#
- 1...Bb6
- 2.Qg8#
- 1...Bxf6
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Be7
- 2.Qg8#
- 1...Se2
- 2.Sd2#
- 1...Sb5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sc8
- 2.Qc6#
- 1...f2
- 2.Sd2#
- 1...g3
- 2.Sd6#
- 1...Qg3
- Tries
- 1.Kh5?
- 1...Bxf6
- 2.Qg8#
- 1...Sc6
- 2.Qxc6#
- 1...Qg3
- 2.Sd2#
- 1...Qf4
- 2.Sd2#
- 1...Qd6
- 2.Sd2#
- 2.Sxd6#
- 1...Qc7
- 2.Sd2#
- 1...Qb8
- 2.Sd2#
- 1...Qc2
- 2.Sd6#
- 1...Qd2
- 2.Sxd2#
- 2.Sd6#
- 1...Qe2
- 2.Sd6#
- 1...Qf2
- 2.Sd6#
- 1...Qg2
- 2.Sd6#
- 1...Rg3
- 2.Sd6#
- 1...Bg2
- 2.Sd2#
- 1...Ba5
- 2.Qg8#
- 1...Bb6
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Be7
- 2.Qg8#
- 1...Se2
- 2.Sd2#
- 1...Sb5
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...f2
- 2.Sd2#
- 1...g3
- 2.Sd6#
- 1...Qe5+!
- 1...Bxf6
- 1.Kh6?
- 1...Bxf6
- 2.Qg8#
- 1...Sc6
- 2.Qxc6#
- 1...Qg3
- 2.Sd2#
- 1...Qe5
- 2.Sd2#
- 1...Qd6
- 2.Sd2#
- 2.Sxd6#
- 1...Qc7
- 2.Sd2#
- 1...Qb8
- 2.Sd2#
- 1...Qc2
- 2.Sd6#
- 1...Qd2
- 2.Sxd2#
- 2.Sd6#
- 1...Qe2
- 2.Sd6#
- 1...Qf2
- 2.Sd6#
- 1...Qg2
- 2.Sd6#
- 1...Rg3
- 2.Sd6#
- 1...Bg2
- 2.Sd2#
- 1...Ba5
- 2.Qg8#
- 1...Bb6
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Be7
- 2.Qg8#
- 1...Se2
- 2.Sd2#
- 1...Sb5
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...f2
- 2.Sd2#
- 1...g3
- 2.Sd6#
- 1...Qf4+!
- 1...Bxf6
- 1.Kh7?
- 1...Bxf6
- 2.Qg8#
- 1...Sc6
- 2.Qxc6#
- 1...Qg3
- 2.Sd2#
- 1...Qf4
- 2.Sd2#
- 1...Qe5
- 2.Sd2#
- 1...Qd6
- 2.Sd2#
- 2.Sxd6#
- 1...Qb8
- 2.Sd2#
- 1...Qc2
- 2.Sd6#
- 1...Qd2
- 2.Sxd2#
- 2.Sd6#
- 1...Qe2
- 2.Sd6#
- 1...Qf2
- 2.Sd6#
- 1...Qg2
- 2.Sd6#
- 1...Rg3
- 2.Sd6#
- 1...Bg2
- 2.Sd2#
- 1...Ba5
- 2.Qg8#
- 1...Bb6
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Be7
- 2.Qg8#
- 1...Se2
- 2.Sd2#
- 1...Sb5
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...f2
- 2.Sd2#
- 1...g3
- 2.Sd6#
- 1...Qc7+!
- 1...Bxf6
- 1.Bxb2?
- 1...Bxf6
- 2.Qg8#
- 1...Sc6
- 2.Qxc6#
- 1...Qg3
- 2.Sd2#
- 2.Rc1#
- 1...Qf4
- 2.Sd2#
- 2.Rc1#
- 1...Qe5
- 2.Sd2#
- 1...Qd6
- 2.Sd2#
- 2.Sxd6#
- 2.Rc1#
- 1...Qc7
- 2.Sd2#
- 2.Rc1#
- 1...Qb8
- 2.Sd2#
- 2.Rc1#
- 1...Qc2
- 2.Sd6#
- 1...Qd2
- 2.Sxd2#
- 2.Sd6#
- 1...Qe2
- 2.Sd6#
- 1...Qf2
- 2.Sd6#
- 1...Qg2
- 2.Sd6#
- 1...Rg3
- 2.Sd6#
- 1...Bg2
- 2.Sd2#
- 2.Rc1#
- 1...Ba5
- 2.Qg8#
- 1...Bb6
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Be7
- 2.Qg8#
- 1...Se2
- 2.Sd2#
- 1...Sb5
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...f2
- 2.Sd2#
- 2.Rc1#
- 1...g3
- 2.Sd6#
- 1...Qxb2!
- 1...Bxf6
- 1.Be5?
- threat
- 2.Sd6#
- 1...Sc6
- 2.Qxc6#
- 1...Bc7
- 2.Qg8#
- 1...Be7
- 2.Qg8#
- 1...Sb5
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...Qxe5!
- threat
- 1.Re1?
- 1...Bxf6
- 2.Qg8#
- 1...Sc6
- 2.Qxc6#
- 1...Qg3
- 2.Sd2#
- 1...Qf4
- 2.Sd2#
- 1...Qe5
- 2.Sd2#
- 1...Qd6
- 2.Sd2#
- 2.Sxd6#
- 1...Qc7
- 2.Sd2#
- 1...Qb8
- 2.Sd2#
- 1...Qd2
- 2.Sxd2#
- 2.Sd6#
- 1...Qe2
- 2.Sd6#
- 1...Qf2
- 2.Sd6#
- 1...Qg2
- 2.Sd6#
- 1...Rg3
- 2.Sd6#
- 1...Bg2
- 2.Sd2#
- 1...Ba5
- 2.Qg8#
- 1...Bb6
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Be7
- 2.Qg8#
- 1...Se2
- 2.Sd2#
- 1...Sb5
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...f2
- 2.Sd2#
- 1...g3
- 2.Sd6#
- 1...Qc2!
- 1...Bxf6
- 1.Rf1?
- 1...Bxf6
- 2.Qg8#
- 1...Sc6
- 2.Qxc6#
- 1...Qg3
- 2.Sd2#
- 1...Qf4
- 2.Sd2#
- 1...Qe5
- 2.Sd2#
- 1...Qd6
- 2.Sd2#
- 2.Sxd6#
- 1...Qc7
- 2.Sd2#
- 1...Qb8
- 2.Sd2#
- 1...Qd2
- 2.Sxd2#
- 2.Sd6#
- 1...Qe2
- 2.Sd6#
- 1...Qf2
- 2.Sd6#
- 1...Qg2
- 2.Sd6#
- 1...Rg3
- 2.Sd6#
- 1...Bg2
- 2.Sd2#
- 1...Ba5
- 2.Qg8#
- 1...Bb6
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Be7
- 2.Qg8#
- 1...Se2
- 2.Sd2#
- 1...Sb5
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...f2
- 2.Sd2#
- 1...g3
- 2.Sd6#
- 1...Qc2!
- 1...Bxf6
- 1.Rxg1?
- 1...Qxg1
- 2.Sd2#
- 2.Sd6#
- 1...Bxf6
- 2.Qg8#
- 1...Sc6
- 2.Qxc6#
- 1...Qg3
- 2.Sd2#
- 1...Qf4
- 2.Sd2#
- 1...Qe5
- 2.Sd2#
- 1...Qd6
- 2.Sd2#
- 2.Sxd6#
- 1...Qc7
- 2.Sd2#
- 1...Qb8
- 2.Sd2#
- 1...Qd2
- 2.Sxd2#
- 2.Sd6#
- 1...Qe2
- 2.Sd6#
- 1...Qf2
- 2.Sd6#
- 1...Qg2
- 2.Sd6#
- 1...Rg3
- 2.Sd6#
- 1...Bg2
- 2.Sd2#
- 1...Ba5
- 2.Qg8#
- 1...Bb6
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Be7
- 2.Qg8#
- 1...Sb5
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...f2
- 2.Sd2#
- 1...g3
- 2.Sd6#
- 1...Qc2!
- 1...Qxg1
- 1.Qc8+?
- 1...Kd5
- 2.Sb4#
- 1...Qc7
- 2.Qe6#
- 1...Bc7
- 2.Qe6#
- 2.Qg8#
- 1...Sc6
- 2.Qe6#
- 2.Qxc6#
- 1...Sxc8!
- 1...Kd5
- 1.Qxd8?
- threat
- 2.Qg8#
- 1...Qe5
- 2.Sd2#
- 1...Qc7
- 2.Sd2#
- 1...Qb8
- 2.Sd2#
- 1...Qd6!
- threat
- 1.Kh5?
- Keys
- 1.Bc3!
- 1...Bxf6
- 2.Qg8#
- 1...Sc6
- 2.Qxc6#
- 1...Qg3
- 2.Sxb2#
- 1...Qf4
- 2.Sxb2#
- 1...Qe5
- 2.Sxb2#
- 2.Sxe5#
- 1...Qd6
- 2.Sxb2#
- 1...Qc7
- 2.Sxb2#
- 1...Qb8
- 2.Sxb2#
- 1...Qc2
- 2.Se5#
- 1...Qd2
- 2.Se5#
- 1...Qe2
- 2.Se5#
- 1...Qf2
- 2.Se5#
- 1...Qg2
- 2.Se5#
- 1...Rg3
- 2.Se5#
- 1...Bg2
- 2.Sxb2#
- 1...Ba5
- 2.Qg8#
- 1...Bb6
- 2.Qg8#
- 1...Bc7
- 2.Qg8#
- 1...Be7
- 2.Qg8#
- 1...Se2
- 2.Sxb2#
- 1...Sb5
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...f2
- 2.Sxb2#
- 1...g3
- 2.Se5#
- 1...Bxf6
- 1.Bc3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 13
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- Q(d);N_GUARD::S(G)
- R(g);S_CUTQ(d)::S(G)
- B(b);S_CUTQ(d)::S(G)
- B(l);OGATE::QAB(J)
- B(l);OGATE,XP(H)::QAB(J)
- S(a);S_CUTQ(d)::S(G)
- S(k);N_GUARD::QAR2(J)
- S(k);N_GUARD::QAR2(J),XS(k)
- P(f);S_CUTQ(d)::S(G)
- P(i);S_CUTQ(d)::S(G)
- Tries
- Try
- K(I);S_FLIGHT
- Vars
- B(l);OGATE,XP(H)::QAB(J)
- S(k);N_GUARD::QAR2(J),XS(k)
- Q(d);N_GUARD::S(G)
- R(g);S_CUTQ(d)::S(G)
- B(b);S_CUTQ(d)::S(G)
- B(l);OGATE::QAB(J)
- S(a);S_CUTQ(d)::S(G)
- S(k);N_GUARD::QAR2(J)
- P(f);S_CUTQ(d)::S(G)
- P(i);S_CUTQ(d)::S(G)
- Refutation
- Q(d);CHECK
- Try
- K(I);P-FLIGHT
- Vars
- B(l);OGATE,XP(H)::QAB(J)
- S(k);N_GUARD::QAR2(J),XS(k)
- Q(d);N_GUARD::S(G)
- R(g);S_CUTQ(d)::S(G)
- B(b);S_CUTQ(d)::S(G)
- B(l);OGATE::QAB(J)
- S(a);S_CUTQ(d)::S(G)
- S(k);N_GUARD::QAR2(J)
- P(f);S_CUTQ(d)::S(G)
- P(i);S_CUTQ(d)::S(G)
- Refutation
- Q(d);CHECK
- Try
- K(I);S_FLIGHT
- Vars
- B(l);OGATE,XP(H)::QAB(J)
- S(k);N_GUARD::QAR2(J),XS(k)
- Q(d);N_GUARD::S(G)
- R(g);S_CUTQ(d)::S(G)
- B(b);S_CUTQ(d)::S(G)
- B(l);OGATE::QAB(J)
- S(a);S_CUTQ(d)::S(G)
- S(k);N_GUARD::QAR2(J)
- P(f);S_CUTQ(d)::S(G)
- P(i);S_CUTQ(d)::S(G)
- Refutation
- Q(d);CHECK
- Try
- B(F);XP(c)
- Vars
- B(l);OGATE,XP(H)::QAB(J)
- S(k);N_GUARD::QAR2(J),XS(k)
- Q(d);N_GUARD::S(G)
- R(g);S_CUTQ(d)::S(G)
- B(l);OGATE::QAB(J)
- S(a);S_CUTQ(d)::S(G)
- S(k);N_GUARD::QAR2(J)
- P(i);S_CUTQ(d)::S(G)
- Refutation
- Q(d);XB(F)
- Try
- B(F);
- Threat
- S(G)
- Vars
- S(k);N_GUARD::QAR2(J),XS(k)
- B(l);OGATE::QAB(J)
- S(k);N_GUARD::QAR2(J)
- Refutation
- Q(d);XB(F)
- Try
- R(B);
- Vars
- B(l);OGATE,XP(H)::QAB(J)
- S(k);N_GUARD::QAR2(J),XS(k)
- Q(d);N_GUARD::S(G)
- R(g);S_CUTQ(d)::S(G)
- B(b);S_CUTQ(d)::S(G)
- B(l);OGATE::QAB(J)
- S(a);S_CUTQ(d)::S(G)
- S(k);N_GUARD::QAR2(J)
- P(f);S_CUTQ(d)::S(G)
- P(i);S_CUTQ(d)::S(G)
- Refutation
- Q(d);
- Try
- R(B);
- Vars
- B(l);OGATE,XP(H)::QAB(J)
- S(k);N_GUARD::QAR2(J),XS(k)
- Q(d);N_GUARD::S(G)
- R(g);S_CUTQ(d)::S(G)
- B(b);S_CUTQ(d)::S(G)
- B(l);OGATE::QAB(J)
- S(a);S_CUTQ(d)::S(G)
- S(k);N_GUARD::QAR2(J)
- P(f);S_CUTQ(d)::S(G)
- P(i);S_CUTQ(d)::S(G)
- Refutation
- Q(d);
- Try
- R(B);XS(a)
- Vars
- B(l);OGATE,XP(H)::QAB(J)
- S(k);N_GUARD::QAR2(J),XS(k)
- Q(d);N_GUARD::S(G)
- R(g);S_CUTQ(d)::S(G)
- B(b);S_CUTQ(d)::S(G)
- B(l);OGATE::QAB(J)
- S(k);N_GUARD::QAR2(J)
- P(f);S_CUTQ(d)::S(G)
- P(i);S_CUTQ(d)::S(G)
- Refutation
- Q(d);
- Try
- Q(J);CHECK
- Vars
- K(h);S_FLIGHT::S(C)
- Q(d);P_SPINQ(d)::QAB(J)
- Refutation
- S(k);XQ(J)
- Try
- Q(J);XB(l)
- Threat
- QAB(J)
- Vars
- Q(d);N_GUARD::S(G)
- Refutation
- Q(d);P_PINP(H)
- Try
- Actual
- B(F);
- Vars
- B(l);OGATE,XP(H)::QAB(J)
- S(k);N_GUARD::QAR2(J),XS(k)
- Q(d);N_GUARD::S(C),XP(c)
- Q(d);N_GUARD,P_PINP(H)::S(C),XP(c)
- Q(d);N_GUARD::S(C)
- R(g);S_CUTQ(d)::S(C)
- B(b);S_CUTQ(d)::S(C),XP(c)
- B(l);OGATE::QAB(J)
- S(a);S_CUTQ(d)::S(C),XP(c)
- S(k);N_GUARD::QAR2(J)
- P(f);S_CUTQ(d)::S(C),XP(c)
- P(i);S_CUTQ(d)::S(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).