MESON Chess Problem Database
Problem Display
PID: 247505 (5K2/4P3/2bpB3/2ppkNP1/1n1RqN2/5P2/7Q/4R1B1 w - - 0 1)
Coello Alonso, Jose Antonio
BCPS Website, 2021
#2
11 + 7
SOLUTION
- SOUND
- Sets
- 1...Qxe1
- 2.Qh8#
- 1...Qe2
- 2.Rxe2#
- 2.Qxe2#
- 2.Qh8#
- 1...Qe3
- 2.Rxe3#
- 2.Qh8#
- 1...cxd4
- 2.Bxd4#
- 1...Qxe1
- Tries
- 1.Kf7?
- threat
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 1...Qxe1
- 2.Sd3#
- 2.Sg6#
- 2.Qh8#
- 1...Sd3
- 2.Sxd3#
- 2.Sg6#
- 1...Be8+!
- threat
- 1.Se2+?
- 1...Qf4
- 2.Sc1#
- 2.Sc3#
- 2.Sxf4#
- 1...Kxe6!
- 1...Qf4
- 1.Sh6?
- threat
- 2.Sg4#
- 2.Sf7#
- 1...Be8
- 2.Sg4#
- 1...Qe3!
- threat
- 1.Sg7?
- threat
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sfh5#
- 2.Sg6#
- 1...Qxe1
- 2.Sd3#
- 2.Sg6#
- 1...Sd3
- 2.Sxd3#
- 2.Sg6#
- 1...Qe3!
- threat
- 1.Be3?
- threat
- 2.Qh8#
- 1...Qxf4
- 2.Bc1#
- 2.Bg1#
- 2.Bd2#
- 2.Bf2#
- 2.Bxf4#
- 1...Qxf5+!
- threat
- 1.Bd7?
- threat
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.e8Q#
- 2.e8R#
- 1...Qxe1
- 2.Sd3#
- 2.Sg6#
- 2.Qh8#
- 2.e8Q#
- 2.e8R#
- 1...cxd4
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sh5#
- 2.Sg6#
- 2.Bxd4#
- 2.e8Q#
- 2.e8R#
- 1...Ba4
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.e8Q#
- 2.e8R#
- 1...Qe2
- 2.Sxe2#
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.Rxe2#
- 2.Qxe2#
- 2.Qh8#
- 2.e8Q#
- 2.e8R#
- 1...Qe3
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.Rxe3#
- 2.Qh8#
- 2.e8Q#
- 2.e8R#
- 1...Bb5
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.e8Q#
- 2.e8R#
- 1...Bb7
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.e8Q#
- 2.e8R#
- 1...Ba8
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.e8Q#
- 2.e8R#
- 1...Sa2
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.e8Q#
- 2.e8R#
- 1...Sc2
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.e8Q#
- 2.e8R#
- 1...Sd3
- 2.Sxd3#
- 2.Sg6#
- 2.e8Q#
- 2.e8R#
- 1...Sa6
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.e8Q#
- 2.e8R#
- 1...c4
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.e8Q#
- 2.e8R#
- 1...Bxd7!
- threat
- 1.Bc8?
- threat
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 1...Qxe1
- 2.Sd3#
- 2.Sg6#
- 2.Qh8#
- 1...cxd4
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sh5#
- 2.Sg6#
- 2.Bxd4#
- 1...Sd3
- 2.Sxd3#
- 2.Sg6#
- 1...Bd7!
- threat
- 1.Rxd5+?
- 1...Sxd5
- 2.Rxe4#
- 1...Bxd5!
- 1...Sxd5
- 1.e8Q?
- threat
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.Bd7#
- 1...Qxe1
- 2.Sd3#
- 2.Sg6#
- 2.Bd7#
- 2.Qh8#
- 1...Bd7
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.Bxd7#
- 1...Sd3
- 2.Sxd3#
- 2.Sg6#
- 2.Bd7#
- 1...Bxe8!
- threat
- 1.e8R?
- threat
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.Bd7#
- 1...Qxe1
- 2.Sd3#
- 2.Sg6#
- 2.Bd7#
- 2.Qh8#
- 1...Bd7
- 2.Sg2#
- 2.Sd3#
- 2.Sh3#
- 2.Sxd5#
- 2.Sh5#
- 2.Sg6#
- 2.Bxd7#
- 1...Sd3
- 2.Sxd3#
- 2.Sg6#
- 2.Bd7#
- 1...Bxe8!
- threat
- 1.Kf7?
- Keys
- 1.Se3!
- threat
- 2.Sg4#
- 1...Qf5+
- 2.Sxf5#
- 1...Qxf4+
- 2.Sf5#
- 1...Kxd4
- 2.Qb2#
- 1...Qxe3
- 2.Qh8#
- threat
- 1.Se3!
This is a version of 247504
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- Q(b);N_SPINQ(b),XR(A)::QAB(C)
- P(c);OGATE,XR(E)::B(B),XP(c)
- Tries
- Try
- K(K);P-FLIGHT
- Threat
- DUALS(6)
- Refutation
- B(f);CHECK
- Try
- S(F);CHECK,N_PINQ(b)
- Refutation
- K(e);P-FLIGHT,XB(I)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(f);::S(G)
- Refutation
- Q(b);
- Try
- S(G);
- Threat
- DUALS(6)
- Refutation
- Q(b);
- Try
- B(B);N_PINQ(b)
- Threat
- QAB(C)
- Refutation
- Q(b);CHECK,XS(G)
- Try
- B(I);
- Threat
- DUALS(8)
- Refutation
- B(f);XB(I)
- Try
- B(I);
- Threat
- DUALS(6)
- Refutation
- B(f);
- Try
- R(E);CHECK,XP(d)
- Vars
- S(a);XR(E)::R1(A),XQ(b)
- Refutation
- B(f);XR(E)
- Try
- P(J);
- Threat
- DUALS(7)
- Refutation
- B(f);XQ(J)
- Try
- P(J);
- Threat
- DUALS(7)
- Refutation
- B(f);XR(J)
- Try
- Actual
- S(G);N_PINQ(b)
- Threat
- S(G)
- Vars
- Q(b);CHECK::R(A)+S(G),XQ(b)
- Q(b);CHECK,P_SPINQ(b),XS(F)::R(A)+S(G)
- K(e);OGATEB,S_FLIGHT,XR(E)::QAB(C)
- Q(b);P_SPINQ(b),XS(G)::QAB(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).