MESON Chess Problem Database
Problem Display
PID: 210169 (4nq2/2p3p1/2p1Q1P1/4P3/N1P1P1Rp/p2kP1pK/R3N1B1/2B5 w - - 0 1)
Bernard, Henry D'Oyly
The Observer, 1920
#2
13 + 9
| 15239 | Valois Notebooks | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qb4
- 2.Sf4#
- 1...Qc5
- 2.Sf4#
- 2.Sxc5#
- 1...Qd6
- 2.Sf4#
- 1...Qe7
- 2.Sf4#
- 1...Qf1
- 2.Sc5#
- 1...Qf2
- 2.Sc5#
- 1...Qf3
- 2.Sc5#
- 1...Qf4
- 2.Sxf4#
- 2.Sc5#
- 1...Qf5
- 2.Sc5#
- 1...Qf6
- 2.Sc5#
- 1...Qf7
- 2.Sc5#
- 1...Qg8
- 2.Sf4#
- 2.Sc5#
- 1...Qh8
- 2.Sf4#
- 2.Sc5#
- 1...Sd6
- 2.Sc5#
- 1...Sf6
- 2.Sf4#
- 1...c5
- 2.Qd5#
- 1...Qb4
- Tries
- 1.Bf3?
- 1...Qxf3
- 2.Sc5#
- 1...Qb4
- 2.Sf4#
- 1...Qc5
- 2.Sf4#
- 2.Sxc5#
- 1...Qd6
- 2.Sf4#
- 1...Qe7
- 2.Sf4#
- 1...Qf4
- 2.Sxf4#
- 2.Sc5#
- 1...Qf5
- 2.Sc5#
- 1...Qf6
- 2.Sc5#
- 1...Qf7
- 2.Sc5#
- 1...Qg8
- 2.Sf4#
- 2.Sc5#
- 1...Qh8
- 2.Sf4#
- 2.Sc5#
- 1...Sd6
- 2.Sc5#
- 1...Sf6
- 2.Sf4#
- 1...c5
- 2.Qd5#
- 1...g2!
- 1...Qxf3
- 1.Rxh4?
- 1...Qf2
- 2.Sc5#
- 1...Qb4
- 2.Sf4#
- 1...Qc5
- 2.Sf4#
- 2.Sxc5#
- 1...Qd6
- 2.Sf4#
- 1...Qe7
- 2.Sf4#
- 1...Qf1
- 2.Sc5#
- 1...Qf3
- 2.Sc5#
- 1...Qf4
- 2.Sxf4#
- 2.Sc5#
- 1...Qf6
- 2.Sc5#
- 1...Qf7
- 2.Sc5#
- 1...Qg8
- 2.Sf4#
- 2.Sc5#
- 1...Qh8
- 2.Sf4#
- 2.Sc5#
- 1...Sd6
- 2.Sc5#
- 1...Sf6
- 2.Sf4#
- 1...c5
- 2.Qd5#
- 1...Qf5+!
- 1...Qf2
- 1.Rg5?
- 1...Qf3
- 2.Sc5#
- 1...Qf2
- 2.Sc5#
- 1...Qb4
- 2.Sf4#
- 1...Qc5
- 2.Sf4#
- 2.Sxc5#
- 1...Qd6
- 2.Sf4#
- 1...Qe7
- 2.Sf4#
- 1...Qf1
- 2.Sc5#
- 1...Qf4
- 2.Sxf4#
- 2.Sc5#
- 1...Qf6
- 2.Sc5#
- 1...Qf7
- 2.Sc5#
- 1...Qg8
- 2.Sf4#
- 2.Sc5#
- 1...Qh8
- 2.Sf4#
- 2.Sc5#
- 1...Sd6
- 2.Sc5#
- 1...Sf6
- 2.Sf4#
- 1...c5
- 2.Qd5#
- 1...Qf5+!
- 1...Qf3
- 1.c5?
- threat
- 2.Qb3#
- 1...Qxc5
- 2.Sf4#
- 2.Sxc5#
- 1...Qg8
- 2.Sf4#
- 1...Qf7!
- threat
- 1.Bf3?
- Keys
- 1.Sd4!
- 1...Qf2
- 2.Rxa3#
- 1...Qb4
- 2.Bf1#
- 1...Qc5
- 2.Bf1#
- 1...Qd6
- 2.Bf1#
- 1...Qe7
- 2.Bf1#
- 1...Qf1
- 2.Bxf1#
- 2.Rxa3#
- 1...Qf3
- 2.Rxa3#
- 1...Qf4
- 2.Rxa3#
- 1...Qf5
- 2.Rxa3#
- 1...Qf6
- 2.Rxa3#
- 1...Qf7
- 2.Rxa3#
- 1...Qg8
- 2.Bf1#
- 2.Rxa3#
- 1...Qh8
- 2.Bf1#
- 2.Rxa3#
- 1...Sd6
- 2.Rxa3#
- 1...Sf6
- 2.Bf1#
- 1...c5
- 2.Rxa3#
- 1...Qf2
- 1.Sd4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 11
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- Q(i);N_GUARD::S(C)
- Q(i);N_GUARD,P_PINB(D)::S(G)
- Q(i);N_GUARD::S(G)
- Q(i);N_GUARD,P_PINR(J)::S(G)
- S(h);S_CUTQ(i)::S(G)
- S(h);S_CUTQ(i)::S(C)
- P(e);N_GUARD::QAR2(L)
- Tries
- Try
- B(D);
- Vars
- Q(i);N_GUARD,XB(D)::S(G)
- Q(i);N_GUARD::S(C)
- Q(i);N_GUARD,P_PINR(J)::S(G)
- Q(i);N_GUARD::S(G)
- S(h);S_CUTQ(i)::S(G)
- S(h);S_CUTQ(i)::S(C)
- P(e);N_GUARD::QAR2(L)
- Refutation
- P(c);
- Try
- R(J);XP(d)
- Vars
- Q(i);N_GUARD::S(G)
- Q(i);N_GUARD::S(C)
- Q(i);N_GUARD,P_PINB(D)::S(G)
- S(h);S_CUTQ(i)::S(G)
- S(h);S_CUTQ(i)::S(C)
- P(e);N_GUARD::QAR2(L)
- Refutation
- Q(i);CHECK
- Try
- R(J);
- Vars
- Q(i);N_GUARD::S(G)
- Q(i);N_GUARD::S(C)
- Q(i);N_GUARD,P_PINB(D)::S(G)
- S(h);S_CUTQ(i)::S(G)
- S(h);S_CUTQ(i)::S(C)
- P(e);N_GUARD::QAR2(L)
- Refutation
- Q(i);CHECK
- Try
- P(H);
- Threat
- QAR2(L)
- Vars
- Q(i);N_GUARD::S(C)
- Refutation
- Q(i);
- Try
- Actual
- S(C);
- Vars
- Q(i);N_GUARD::R(B),XP(a)
- Q(i);N_GUARD::B(D)
- Q(i);N_GUARD,P_PINR(J)::R(B),XP(a)
- S(h);S_CUTQ(i)::R(B),XP(a)
- S(h);S_CUTQ(i)::B(D)
- P(e);S_CUTQ(i)::R(B),XP(a)
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).