MESON Chess Problem Database
Problem Display
PID: 101010 (8/p1N3Q1/1r3p1K/3B2p1/q2k2b1/2Rp4/3P3B/4N3 w - - 0 1)
Heydon, Joseph Kentigern
Good Companions, 1921
#2
8 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Rc4#
- 1...Qd7
- 2.Rc4#
- 1...Qe8
- 2.Rc4#
- 1...Qa1
- 2.Rc4#
- 1...Qa3
- 2.Rc4#
- 1...Qc4
- 2.Rxc4#
- 1...Qa5
- 2.Rc4#
- 1...Rb1
- 2.Qxf6#
- 1...Rb2
- 2.Qxf6#
- 1...Rb3
- 2.Qxf6#
- 1...Rb4
- 2.Qxf6#
- 1...Rb5
- 2.Qxf6#
- 1...Rb7
- 2.Qxf6#
- 1...Rb8
- 2.Qxf6#
- 1...Bf3
- 2.Sxf3#
- 1...Bh3
- 2.Sf3#
- 1...Bf5
- 2.Sf3#
- 1...Be6
- 2.Sf3#
- 2.Qxf6#
- 1...Bd7
- 2.Sf3#
- 1...Bc8
- 2.Sf3#
- 1...Qd1
- Tries
- 1.Bd6?
- threat
- 2.Rxd3#
- 2.Qxf6#
- 1...Qc2
- 2.Qxf6#
- 1...Qb3
- 2.Qxf6#
- 1...Qb5
- 2.Qxf6#
- 1...Qe8
- 2.Rxd3#
- 2.Rc4#
- 1...Qa3
- 2.Rc4#
- 2.Qxf6#
- 1...Qc4
- 2.Rxc4#
- 2.Qxf6#
- 1...Qa6
- 2.Qxf6#
- 1...Rb3
- 2.Qxf6#
- 1...Be2
- 2.Qxf6#
- 1...Bf5
- 2.Sf3#
- 2.Qxf6#
- 1...Rxd6!
- threat
- 1.Qg6?
- threat
- 2.Qxd3#
- 2.Qe4#
- 1...Qc4
- 2.Rxc4#
- 1...Qc2
- 2.Qe4#
- 1...Qb5
- 2.Qe4#
- 1...Qe8
- 2.Rc4#
- 2.Qxd3#
- 1...Qa6
- 2.Qe4#
- 1...Re6
- 2.Qxd3#
- 1...Be2
- 2.Qe4#
- 1...Bf3
- 2.Sxf3#
- 2.Qxd3#
- 1...Bf5
- 2.Sf3#
- 1...f5!
- threat
- 1.Qe7?
- threat
- 2.Bg1#
- 2.Rxd3#
- 2.Qc5#
- 2.Qe3#
- 2.Qe4#
- 1...Qc2
- 2.Bg1#
- 2.Qc5#
- 2.Qe3#
- 2.Qe4#
- 1...Qb3
- 2.Bg1#
- 2.Qc5#
- 2.Qe3#
- 2.Qe4#
- 1...Qb5
- 2.Bg1#
- 2.Qe3#
- 2.Qe4#
- 1...Qc6
- 2.Bg1#
- 2.Rxd3#
- 2.Qe3#
- 2.Qe4#
- 1...Qe8
- 2.Bg1#
- 2.Rxd3#
- 2.Rc4#
- 2.Qc5#
- 1...Qa3
- 2.Bg1#
- 2.Rc4#
- 2.Qe3#
- 2.Qe4#
- 1...Qb4
- 2.Bg1#
- 2.Rxd3#
- 2.Qe3#
- 2.Qe4#
- 1...Qc4
- 2.Bg1#
- 2.Rxc4#
- 2.Qe3#
- 1...Qa5
- 2.Bg1#
- 2.Rxd3#
- 2.Rc4#
- 2.Qe3#
- 2.Qe4#
- 1...Qa6
- 2.Bg1#
- 2.Qc5#
- 2.Qe3#
- 2.Qe4#
- 1...Rb3
- 2.Bg1#
- 2.Qc5#
- 2.Qxf6#
- 2.Qe3#
- 2.Qe4#
- 1...Rb5
- 2.Bg1#
- 2.Rxd3#
- 2.Qxf6#
- 2.Qe3#
- 2.Qe4#
- 1...Rc6
- 2.Bg1#
- 2.Rxd3#
- 2.Qe3#
- 2.Qe4#
- 1...Rd6
- 2.Bg1#
- 2.Qe3#
- 2.Qe4#
- 1...Re6
- 2.Rxd3#
- 2.Qc5#
- 1...Be2
- 2.Bg1#
- 2.Qc5#
- 2.Qe3#
- 2.Qe4#
- 1...Bf3
- 2.Sxf3#
- 2.Bg1#
- 2.Rxd3#
- 2.Qc5#
- 2.Qe3#
- 1...Bf5
- 2.Sf3#
- 2.Bg1#
- 2.Qc5#
- 2.Qe3#
- 1...Be6
- 2.Sf3#
- 2.Rxd3#
- 2.Qc5#
- 2.Qxf6#
- 1...f5+!
- threat
- 1.Qh7?
- threat
- 2.Qxd3#
- 2.Qe4#
- 1...Qc4
- 2.Rxc4#
- 1...Qc2
- 2.Qe4#
- 1...Qb5
- 2.Qe4#
- 1...Qe8
- 2.Rc4#
- 2.Qxd3#
- 1...Qa6
- 2.Qe4#
- 1...Re6
- 2.Qxd3#
- 1...Be2
- 2.Qe4#
- 1...Bf3
- 2.Sxf3#
- 2.Qxd3#
- 1...Bf5
- 2.Sf3#
- 1...f5+!
- threat
- 1.Bd6?
- Keys
- 1.Qd7!
- threat
- 2.Qxg4#
- 1...f5+
- 2.Bc6#
- 1...Qxd7
- 2.Rc4#
- 1...Bxd7
- 2.Sf3#
- 1...Qc4
- 2.Rxc4#
- 1...Qd1
- 2.Rc4#
- 1...Re6
- 2.Qxa4#
- 1...Bd1
- 2.Bc6#
- 1...Be2
- 2.Bc6#
- 1...Bf3
- 2.Sxf3#
- 1...Bh3
- 2.Sf3#
- 1...Bf5
- 2.Sf3#
- 1...Bh5
- 2.Bc6#
- 1...Be6
- 2.Sf3#
- threat
- 1.Qd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 12
- Sets
- Q(b);N_GUARD::R1(D)
- Q(b);N_GUARD::R1(D),XQ(b)
- R(f);N_GUARD::QAB(H),XP(g)
- B(d);N_GUARD::S(A),XB(d)
- B(d);N_GUARD::S(A)
- Tries
- Try
- B(C);
- Threat
- DUALS(2)
- Vars
- Q(b);::QAB(H),XP(g)
- R(f);::QAB(H),XP(g)
- B(d);::QAB(H),XP(g)
- Refutation
- R(f);XB(C)
- Try
- Q(H);N_PINP(g)
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD::R1(D),XQ(b)
- Q(b);::QAR1(H)
- R(f);::QAR1(H),XP(a)
- B(d);::QAR1(H)
- B(d);N_GUARD::S(A)
- Refutation
- P(g);P_PINQ(H)
- Try
- Q(H);N_PINP(g)
- Threat
- DUALS(5)
- Refutation
- P(g);CHECK
- Try
- Q(H);N_PINP(g)
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD::R1(D),XQ(b)
- Q(b);::QAR1(H)
- R(f);::QAR1(H),XP(a)
- B(d);::QAR1(H)
- B(d);N_GUARD::S(A)
- Refutation
- P(g);CHECK
- Try
- Actual
- Q(H);N_PINP(g)
- Threat
- QAR(H),XB(d)
- Vars
- P(g);CHECK,S_CUTB(d)::QAR(H)+B(E)
- Q(b);N_GUARD,XQ(H)::R1(D)
- B(d);N_GUARD,XQ(H)::S(A)
- Q(b);N_GUARD::R1(D),XQ(b)
- Q(b);N_GUARD::R1(D)
- R(f);N_GUARD::QAR(H),XQ(b)
- B(d);N_GUARD::QAR(H)+B(E)
- B(d);N_GUARD::S(A),XB(d)
- B(d);N_GUARD::S(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).