MESON Chess Problem Database
Problem Display
PID: 100878 (3r2b1/3n4/Q7/2R2N1R/3Pk1p1/pq1N2P1/2B2PKb/6n1 w - - 0 1)
Coombs, Leslie D
Good Companions, 1919
#2
10 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Sb2#
- 1...Qd5
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Qe6
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Qf7
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Qb2
- 2.Sxb2#
- 1...Qxd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Qb4
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sxb4#
- 2.Sf4#
- 2.Se5#
- 1...Qb6
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Qb7
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Qb8
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Se5
- 2.Rxe5#
- 1...Sb6
- 2.Re5#
- 1...Sf6
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Qa2
- Tries
- 1.Sc1+?
- 1...Qd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Qxc2!
- 1...Qd3
- 1.Se1+?
- 1...Qd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Qxc2!
- 1...Qd3
- 1.Sb2+?
- 1...Qd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Qxc2!
- 1...Qd3
- 1.Sb4+?
- 1...Qd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Qxc2!
- 1...Qd3
- 1.Sf4+?
- 1...Qd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Qxc2!
- 1...Qd3
- 1.Se5+?
- 1...Qd3
- 2.Bxd3#
- 2.Qxd3#
- 1...Qxc2!
- 1...Qd3
- 1.Qb7+?
- 1...Qd5
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Qxb7
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Bd5!
- 1...Qd5
- 1.Qc6+?
- 1...Qd5
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Bd5!
- 1...Qd5
- 1.Qe6+?
- 1...Qxe6
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Se5
- 2.Rxe5#
- 2.Qxe5#
- 1...Bxe6!
- 1...Qxe6
- 1.Qf6?
- threat
- 2.Sd6#
- 1...Bxg3
- 2.Sxg3#
- 1...Sxc5
- 2.Qe5#
- 1...Sxf6
- 2.Re5#
- 1...Qd5
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Qe6
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Qb6
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Qb8
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 1...Se5
- 2.Rxe5#
- 2.Qxe5#
- 1...Sb6
- 2.Re5#
- 2.Qe5#
- 1...Sb8
- 2.Re5#
- 2.Qe5#
- 1...Sf8
- 2.Re5#
- 2.Qe5#
- 1...Qxc2!
- threat
- 1.Qh6?
- threat
- 2.Qe3#
- 2.Qf4#
- 1...Qxc2
- 2.Qe3#
- 1...Bxg3
- 2.Qe3#
- 1...Qb8
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Se5#
- 2.Qe3#
- 1...Se2
- 2.Qe3#
- 1...Sh3
- 2.Qe3#
- 1...Sxc5!
- threat
- 1.f3+?
- 1...Sxf3
- 2.Sf2#
- 1...gxf3+!
- 1...Sxf3
- 1.Sc1+?
- Keys
- 1.Rd5!
- threat
- 2.Sd6#
- 1...Kxd5
- 2.Sf4#
- 1...Qxd5
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sc5#
- 2.Se5#
- 1...Bxg3
- 2.Sxg3#
- 1...Bxd5
- 2.Sc5#
- 1...Qb4
- 2.Sxb4#
- 2.Sf4#
- 1...Qb6
- 2.Sb4#
- 2.Sf4#
- 1...Qb8
- 2.Sb4#
- 2.Sf4#
- 1...Sc5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sb6
- 2.Re5#
- 1...Sf6
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sf8
- 2.Re5#
- threat
- 1.Rd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- Q(d);N_GUARD::B(A)+S(D)
- Q(d);N_GUARD::B(A)+S(D),XQ(d)
- S(g);N_GUARD::R1(G),XS(g)
- S(g);N_GUARD::R1(G)
- Tries
- Try
- S(D);CHECK
- Refutation
- Q(d);P_PINP(B),XB(A)
- Try
- S(D);CHECK
- Refutation
- Q(d);P_PINP(B),XB(A)
- Try
- S(D);CHECK
- Refutation
- Q(d);P_PINP(B),XB(A)
- Try
- S(D);CHECK
- Refutation
- Q(d);P_PINP(B),XB(A)
- Try
- S(D);CHECK
- Refutation
- Q(d);P_PINP(B),XB(A)
- Try
- S(D);CHECK
- Refutation
- Q(d);P_PINP(B),XB(A)
- Try
- Q(J);CHECK
- Refutation
- B(i);P_SPINB(i)
- Try
- Q(J);CHECK
- Refutation
- B(i);P_SPINB(i)
- Try
- Q(J);CHECK
- Refutation
- B(i);XQ(J)
- Try
- Q(J);
- Threat
- S(H)
- Vars
- B(b);XP(E)::S(H),XB(b)
- S(g);N_GUARD,XR(G)::QAR1(J)
- S(g);N_GUARD,XQ(J)::R1(G)
- Refutation
- Q(d);P_PINP(B),XB(A)
- Try
- Q(J);
- Threat
- DUALS(2)
- Vars
- Q(d);P_PINP(B),XB(A)::QAR1(J)
- B(b);XP(E)::QAR1(J)
- S(a);::QAR1(J)
- Refutation
- S(g);XR(G)
- Try
- P(B);CHECK
- Vars
- S(a);XP(B)::B(A)+S(D),DCHECK
- Refutation
- P(f);CHECK,XP(B)
- Try
- Actual
- R(G);
- Threat
- S(H)
- Vars
- K(e);S_FLIGHT,XR(G)::S(D)
- B(b);XP(E)::S(H),XB(b)
- B(i);SBLOCK,XR(G)::B(A)+S(D),DCHECK
- S(g);N_GUARD::R1(G)
- S(g);N_GUARD::R1(G),XS(g)
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).