MESON Chess Problem Database
Problem Display
PID: 145261 (r7/1p1q2rn/1B1p1p2/1bp5/4KN2/6N1/np2pkpP/Q1R4R w - - 0 1)
O'Shea, Patrick
The Problemist, 1990
#2
8 + 14
SOLUTION
- SOUND
- Sets
- 1...Qh3
- 2.Sxh3#
- 1...Qc7
- 2.Sh3#
- 1...Qf7
- 2.Sh3#
- 1...Qd8
- 2.Sh3#
- 1...Bd3+
- 2.Sxd3#
- 1...Ba4
- 2.Sd3#
- 1...gxh1Q+
- 2.Sxh1#
- 1...gxh1S
- 2.Sxh1#
- 1...gxh1B+
- 2.Sxh1#
- 1...gxh1R
- 2.Sxh1#
- 1...Qh3
- Keys
- 1.Rxc5!
- threat
- 2.Rcc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qe1#
- 2.Qg1#
- 1...Qf5+
- 2.Rxf5#
- 1...Qc6+
- 2.Rxc6#
- 1...Qe6+
- 2.Re5#
- 1...Qe8+
- 2.Re5#
- 1...Qe7+
- 2.Re5#
- 1...Re7+
- 2.Re5#
- 1...Ra4+
- 2.Rc4#
- 1...Re8+
- 2.Re5#
- 1...Bd3+
- 2.Sxd3#
- 1...Bc6+
- 2.Rd5#
- 2.Rxc6#
- 1...Sc3+
- 2.Rxc3#
- 1...Sg5+
- 2.Rxg5#
- 1...b1Q+
- 2.Rc2#
- 1...b1B+
- 2.Rc2#
- 1...e1Q+
- 2.Qxe1#
- 1...e1R+
- 2.Qxe1#
- 1...gxh1Q+
- 2.Sxh1#
- 1...gxh1B+
- 2.Sxh1#
- 1...d5+
- 2.Rxd5#
- 1...f5+
- 2.Rxf5#
- 1...Rxg3
- 2.Qe1#
- 2.Qg1#
- 1...bxa1Q
- 2.Rc3#
- 1...bxa1S
- 2.Rcc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...bxa1B
- 2.Rc3#
- 1...bxa1R
- 2.Rcc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...gxh1S
- 2.Sxh1#
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...gxh1R
- 2.Sxh1#
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...dxc5
- 2.Qe1#
- 2.Qg1#
- 1...b1S
- 2.Rcc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qd4#
- 1...b1R
- 2.Rcc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qd4#
- 1...e1S
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qxe1#
- 1...e1B
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qxe1#
- 1...g1Q
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qxg1#
- 1...g1S
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qxg1#
- 1...g1B
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qxg1#
- 1...g1R
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qxg1#
- 1...Qc8
- 2.Rc6#
- 2.Rc7#
- 2.Rxc8#
- 2.Qe1#
- 2.Qg1#
- 1...Qc7
- 2.Sh3#
- 2.Rxc7#
- 2.Qe1#
- 2.Qg1#
- 1...Qd8
- 2.Sh3#
- 2.Rc7#
- 2.Qe1#
- 2.Qg1#
- 1...Rg5
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rxg5#
- 2.Qe1#
- 2.Qg1#
- 1...Ra3
- 2.Rc3#
- 2.Qe1#
- 2.Qg1#
- 1...Ra6
- 2.Qe1#
- 2.Qg1#
- 1...Rc8
- 2.Rc6#
- 2.Rc7#
- 2.Rxc8#
- 2.Qe1#
- 2.Qg1#
- 1...Ba4
- 2.Sd3#
- 2.Rcc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Ra5#
- 2.Rb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qe1#
- 2.Qg1#
- 1...Bc4
- 2.Rxc4#
- 2.Ra5#
- 2.Rb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qe1#
- 2.Qg1#
- 1...Ba6
- 2.Rcc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Ra5#
- 2.Rb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 2.Qe1#
- 2.Qg1#
- 1...Sc1
- 2.Rcxc1#
- 2.Rc2#
- 2.Rc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rd5#
- 2.Re5#
- 2.Rf5#
- 2.Rg5#
- 2.Rh5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- threat
- 1.Rxc5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 18
- REMOVED MATES = 7
- Sets
- Q(k);N_GUARD::S(G),XQ(k)
- Q(k);N_GUARD::S(G)
- B(f);CHECK,N_GUARD::S(G),XB(f)
- B(f);N_GUARD::S(G)
- P(e);CHECK,XR(C)::S(E),XQ(e)
- P(e);XR(C)::S(E),XS(e)
- P(e);CHECK,XR(C)::S(E),XB(e)
- P(e);XR(C)::S(E),XR(e)
- Actual
- R(B);XP(g)
- Threat
- DUALS(15)
- Vars
- Q(k);CHECK::B(H)+R(B),XQ(k)
- Q(k);CHECK::B(H)+R(B)
- R(l);CHECK::B(H)+R(B)
- R(n);CHECK::B(H)+R(B)
- B(f);CHECK,N_GUARD::S(G),XB(f)
- S(a);CHECK::B(H)+R(B),XS(a)
- S(m);CHECK::B(H)+R(B),XS(m)
- P(b);CHECK::B(H)+R(B)
- P(c);CHECK::QAB1(A),XQ(c)
- P(c);CHECK::QAB1(A),XR(c)
- P(e);CHECK,XR(C)::S(E),XQ(e)
- P(e);CHECK,XR(C)::S(E),XB(e)
- P(h);CHECK::B(H)+R(B),XP(h)
- P(i);CHECK::B(H)+R(B),XP(i)
- P(b);XQ(A)::B(H)+R(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).