MESON Chess Problem Database
Problem Display
PID: 196854 (5K1b/nQp3n1/1Nr1k1p1/RNp3P1/7P/5B1p/7B/8 w - - 0 1)
Clark, Cecil Henry Douglas
BCPJ, 1919
#2
9 + 9
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Kf5
- 2.Sd4#
- 1...Rxb6
- 2.Qd5#
- 1...Rd6
- 2.Qe4#
- 1...Sxb5
- 2.Qc8#
- 1...Sc8
- 2.Qxc8#
- 1...Sf5
- 2.Bd5#
- 1...Sh5
- 2.Bg4#
- 1...Se8
- 2.Bg4#
- 1...c4
- 2.Sd4#
- 1...cxb6
- 2.Qf7#
- 1...Kf5
- Tries
- 1.Sd6?
- threat
- 2.Bd5#
- 1...Rxd6
- 2.Qe4#
- 1...cxb6
- 2.Qe7#
- 2.Qf7#
- 1...cxd6
- 2.Qd7#
- 2.Qf7#
- 1...Rxb6!
- threat
- 1.Sxa7?
- threat
- 2.Qc8#
- 1...cxb6
- 2.Qf7#
- 1...Rd6
- 2.Qe4#
- 1...Kf5!
- threat
- 1.Sxc7+?
- 1...Rxc7
- 2.Qe4#
- 2.Qd5#
- 1...Kf5!
- 1...Rxc7
- 1.Bg3?
- 1...Kf5
- 2.Sd4#
- 1...Rxb6
- 2.Qd5#
- 1...Sxb5
- 2.Qc8#
- 1...cxb6
- 2.Qf7#
- 1...c4
- 2.Sd4#
- 1...Rd6
- 2.Qe4#
- 1...Sc8
- 2.Qxc8#
- 1...Sf5
- 2.Bd5#
- 1...Sh5
- 2.Bg4#
- 1...Se8
- 2.Bg4#
- 1...h2!
- 1...Kf5
- 1.Bxc7?
- 1...Kf5
- 2.Sd4#
- 1...Rxb6
- 2.Qd5#
- 1...Rxc7
- 2.Qe4#
- 2.Qd5#
- 1...Sxb5
- 2.Qc8#
- 1...Rd6
- 2.Qe4#
- 1...c4
- 2.Sd4#
- 1...Sc8
- 2.Qxc8#
- 1...Sf5
- 2.Bd5#
- 1...Sh5
- 2.Bg4#
- 1...Se8
- 2.Bg4#
- 1...h2!
- 1...Kf5
- 1.Bxc6?
- threat
- 2.Bd7#
- 1...Sxc6
- 2.Qc8#
- 1...Kf5!
- threat
- 1.Ra1?
- 1...Rxb6
- 2.Qd5#
- 1...Sxb5
- 2.Qc8#
- 1...cxb6
- 2.Qf7#
- 1...c4
- 2.Sd4#
- 1...Rd6
- 2.Qe4#
- 1...Sc8
- 2.Qxc8#
- 1...Sf5
- 2.Bd5#
- 1...Sh5
- 2.Bg4#
- 1...Se8
- 2.Bg4#
- 1...Kf5!
- 1...Rxb6
- 1.Ra2?
- 1...Rxb6
- 2.Qd5#
- 1...Sxb5
- 2.Qc8#
- 1...cxb6
- 2.Qf7#
- 1...c4
- 2.Sd4#
- 1...Rd6
- 2.Qe4#
- 1...Sc8
- 2.Qxc8#
- 1...Sf5
- 2.Bd5#
- 1...Sh5
- 2.Bg4#
- 1...Se8
- 2.Bg4#
- 1...Kf5!
- 1...Rxb6
- 1.Ra3?
- 1...Rxb6
- 2.Qd5#
- 1...Sxb5
- 2.Qc8#
- 1...cxb6
- 2.Qf7#
- 1...c4
- 2.Sd4#
- 1...Rd6
- 2.Qe4#
- 1...Sc8
- 2.Qxc8#
- 1...Sf5
- 2.Bd5#
- 1...Sh5
- 2.Bg4#
- 1...Se8
- 2.Bg4#
- 1...Kf5!
- 1...Rxb6
- 1.Ra6?
- 1...Rxb6
- 2.Qd5#
- 1...Sxb5
- 2.Qc8#
- 1...cxb6
- 2.Qf7#
- 1...c4
- 2.Sd4#
- 1...Rd6
- 2.Qe4#
- 1...Sc8
- 2.Qxc8#
- 1...Sf5
- 2.Bd5#
- 1...Sh5
- 2.Bg4#
- 1...Se8
- 2.Bg4#
- 1...Kf5!
- 1...Rxb6
- 1.Rxa7?
- threat
- 2.Qc8#
- 1...cxb6
- 2.Qd7#
- 2.Qf7#
- 1...Rd6
- 2.Qe4#
- 1...Kf5!
- threat
- 1.Qxc6+?
- 1...Kf5
- 2.Sd4#
- 2.Qe4#
- 2.Qd5#
- 2.Qf6#
- 1...Sxc6!
- 1...Kf5
- 1.Qa8?
- 1...Kf5
- 2.Sd4#
- 1...Rxb6
- 2.Qd5#
- 1...Sxb5
- 2.Qc8#
- 1...c4
- 2.Sd4#
- 1...Rd6
- 2.Qe4#
- 1...Sc8
- 2.Qxc8#
- 1...Sf5
- 2.Bd5#
- 1...Sh5
- 2.Bg4#
- 1...Se8
- 2.Bg4#
- 1...cxb6!
- 1...Kf5
- 1.Qxc7?
- threat
- 2.Qe5#
- 2.Qd7#
- 2.Qf7#
- 1...Kf5
- 2.Sd4#
- 2.Qe5#
- 1...Rxb6
- 2.Qf7#
- 1...Rd6
- 2.Qf7#
- 1...Sf5
- 2.Bd5#
- 2.Qd7#
- 2.Qf7#
- 1...Sh5
- 2.Bg4#
- 2.Qd7#
- 2.Qf7#
- 1...Se8
- 2.Bg4#
- 2.Qd7#
- 2.Qf7#
- 1...Rxc7!
- threat
- 1.Sd6?
- Keys
- 1.Ra4!
- 1...Kf5
- 2.Bg4#
- 1...Rxb6
- 2.Qd5#
- 1...Sxb5
- 2.Qc8#
- 1...cxb6
- 2.Qf7#
- 1...c4
- 2.Sd4#
- 1...Rd6
- 2.Qe4#
- 1...Sc8
- 2.Qxc8#
- 1...Sf5
- 2.Bd5#
- 1...Sh5
- 2.Bg4#
- 1...Se8
- 2.Bg4#
- 1...Kf5
- 1.Ra4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- K(d);S_FLIGHT::S(E)
- R(c);OGATE,XS(G)::QAB1(H)
- R(c);OGATE::QAR2(H)
- S(f);N_GUARD,XS(E)::QAB(H)
- S(f);N_GUARD::QAB(H),XS(f)
- S(h);SBLOCK::B(B)
- S(h);N_GUARD::B(B)
- P(b);N_GUARD::S(E)
- P(g);OGATE,XS(G)::QAB1(H)
- Tries
- Try
- S(E);
- Threat
- B(B)
- Vars
- R(c);OGATE,XS(E)::QAR2(H)
- Refutation
- R(c);XS(G)
- Try
- S(E);XS(f)
- Threat
- QAB(H)
- Vars
- P(g);OGATE,XS(G)::QAB1(H)
- R(c);OGATE::QAR2(H)
- Refutation
- K(d);P_SPINP(b),S_FLIGHT
- Try
- S(E);CHECK,XP(g)
- Refutation
- K(d);P_SPINP(b),S_FLIGHT
- Try
- B(A);
- Vars
- K(d);S_FLIGHT::S(E)
- R(c);OGATE,XS(G)::QAB1(H)
- S(f);N_GUARD,XS(E)::QAB(H)
- P(g);OGATE,XS(G)::QAB1(H)
- P(b);N_GUARD::S(E)
- R(c);OGATE::QAR2(H)
- S(f);N_GUARD::QAB(H),XS(f)
- S(h);SBLOCK::B(B)
- S(h);N_GUARD::B(B)
- Refutation
- P(a);
- Try
- B(A);XP(g)
- Vars
- K(d);S_FLIGHT::S(E)
- R(c);OGATE,XS(G)::QAB1(H)
- S(f);N_GUARD,XS(E)::QAB(H)
- R(c);OGATE::QAR2(H)
- P(b);N_GUARD::S(E)
- S(f);N_GUARD::QAB(H),XS(f)
- S(h);SBLOCK::B(B)
- S(h);N_GUARD::B(B)
- Refutation
- P(a);
- Try
- B(B);XR(c)
- Threat
- B(B)
- Vars
- S(f);N_GUARD,XB(B)::QAB(H)
- Refutation
- K(d);S_FLIGHT
- Try
- R(D);
- Vars
- R(c);OGATE,XS(G)::QAB1(H)
- S(f);N_GUARD,XS(E)::QAB(H)
- P(g);OGATE,XS(G)::QAB1(H)
- P(b);N_GUARD::S(E)
- R(c);OGATE::QAR2(H)
- S(f);N_GUARD::QAB(H),XS(f)
- S(h);SBLOCK::B(B)
- S(h);N_GUARD::B(B)
- Refutation
- K(d);S_FLIGHT
- Try
- R(D);
- Vars
- R(c);OGATE,XS(G)::QAB1(H)
- S(f);N_GUARD,XS(E)::QAB(H)
- P(g);OGATE,XS(G)::QAB1(H)
- P(b);N_GUARD::S(E)
- R(c);OGATE::QAR2(H)
- S(f);N_GUARD::QAB(H),XS(f)
- S(h);SBLOCK::B(B)
- S(h);N_GUARD::B(B)
- Refutation
- K(d);S_FLIGHT
- Try
- R(D);
- Vars
- R(c);OGATE,XS(G)::QAB1(H)
- S(f);N_GUARD,XS(E)::QAB(H)
- P(g);OGATE,XS(G)::QAB1(H)
- P(b);N_GUARD::S(E)
- R(c);OGATE::QAR2(H)
- S(f);N_GUARD::QAB(H),XS(f)
- S(h);SBLOCK::B(B)
- S(h);N_GUARD::B(B)
- Refutation
- K(d);S_FLIGHT
- Try
- R(D);
- Vars
- R(c);OGATE,P_SPINR(c),XS(G)::QAB1(H)
- S(f);N_GUARD,XS(E)::QAB(H)
- P(g);OGATE,XS(G)::QAB1(H)
- P(b);N_GUARD::S(E)
- R(c);OGATE::QAR2(H)
- S(f);N_GUARD::QAB(H),XS(f)
- S(h);SBLOCK::B(B)
- S(h);N_GUARD::B(B)
- Refutation
- K(d);S_FLIGHT
- Try
- R(D);XS(f)
- Threat
- QAB(H)
- Vars
- R(c);OGATE::QAR2(H)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(H);CHECK,XR(c)
- Refutation
- S(f);XQ(H)
- Try
- Q(H);
- Vars
- K(d);S_FLIGHT::S(E)
- R(c);OGATE,XS(G)::QAB1(H)
- S(f);N_GUARD,XS(E)::QAB(H)
- P(b);N_GUARD::S(E)
- R(c);OGATE::QAR2(H)
- S(f);N_GUARD::QAB(H),XS(f)
- S(h);SBLOCK::B(B)
- S(h);N_GUARD::B(B)
- Refutation
- P(g);XS(G)
- Try
- Q(H);XP(g)
- Threat
- DUALS(3)
- Vars
- R(c);XS(G)::QAB1(H)
- R(c);::QAB1(H)
- Refutation
- R(c);XQ(H)
- Try
- Actual
- R(D);
- Vars
- K(d);S_FLIGHT::B(B)
- R(c);OGATE,XS(G)::QAB1(H)
- S(f);N_GUARD,XS(E)::QAB(H)
- P(g);OGATE,XS(G)::QAB1(H)
- P(b);N_GUARD::S(E)
- R(c);OGATE::QAR2(H)
- S(f);N_GUARD::QAB(H),XS(f)
- S(h);SBLOCK::B(B)
- S(h);N_GUARD::B(B)
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).