MESON Chess Problem Database
Problem Display
PID: 87869 (8/7B/8/b7/N3K2p/rR2pp2/pBR3P1/Nk5q w - - 0 1)
Tymms, JS
The Problemist, 1975
#2
8 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxg2
- 2.Rc1#
- 1...Qc1
- 2.Rxc1#
- 1...Qh2
- 2.Rc1#
- 1...Qh3
- 2.Rc1#
- 1...Rxa4+
- 2.Bd4#
- 1...Be1
- 2.Rc1#
- 1...Bc3
- 2.Sxc3#
- 1...Bb6
- 2.Sc3#
- 1...Bc7
- 2.Sc3#
- 1...Bd8
- 2.Sc3#
- 1...Qxg2
- Tries
- 1.Kd4?
- threat
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Rxa4+
- 2.Rc4#
- 1...Bc3+
- 2.Sxc3#
- 2.Rcxc3#
- 1...Bb6+
- 2.Rc5#
- 1...Qxg2
- 2.Rc1#
- 2.Rxg2#
- 1...Rxb3
- 2.Rc1#
- 2.Rc3#
- 1...Qc1
- 2.Rxc1#
- 1...Qf1
- 2.Rc1#
- 2.Re2#
- 1...Qh3
- 2.Rc1#
- 1...Bd2
- 2.Rc1#
- 2.Rxd2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Bc7
- 2.Sc3#
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rxc7#
- 1...e2
- 2.Rc1#
- 2.Rd2#
- 2.Rxe2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...f2
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rxf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Qd1+!
- threat
- 1.Kf4?
- threat
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Rxa4+
- 2.Bd4#
- 2.Rc4#
- 1...Bc7+
- 2.Rxc7#
- 1...Qxg2
- 2.Rc1#
- 2.Rxg2#
- 1...Rxb3
- 2.Rc1#
- 2.Rc3#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rc1#
- 1...Qf1
- 2.Rc1#
- 2.Re2#
- 1...Qh3
- 2.Rc1#
- 1...Bd2
- 2.Rc1#
- 2.Rxd2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Bc3
- 2.Sxc3#
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcxc3#
- 1...e2
- 2.Rc1#
- 2.Rd2#
- 2.Rxe2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...f2
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rxf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Qh2+!
- threat
- 1.Kd5?
- threat
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Qxg2
- 2.Rc1#
- 2.Rxg2#
- 1...Rxb3
- 2.Rc1#
- 2.Rc3#
- 1...Rxa4
- 2.Bc3#
- 2.Bd4#
- 2.Be5#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 2.Rc1#
- 2.Rc4#
- 1...Qc1
- 2.Rxc1#
- 1...Qf1
- 2.Rc1#
- 2.Re2#
- 1...Qh3
- 2.Rc1#
- 1...Bd2
- 2.Rc1#
- 2.Rxd2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Bc3
- 2.Sxc3#
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcxc3#
- 1...Bc7
- 2.Sc3#
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rxc7#
- 1...e2
- 2.Rc1#
- 2.Rd2#
- 2.Rxe2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...f2
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rxf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Qd1+!
- threat
- 1.Ke5?
- threat
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Bc3+
- 2.Sxc3#
- 2.Rcxc3#
- 1...Bc7+
- 2.Rxc7#
- 1...Qxg2
- 2.Rc1#
- 2.Rxg2#
- 1...Rxb3
- 2.Rc1#
- 2.Rc3#
- 1...Rxa4
- 2.Bc3#
- 2.Bd4#
- 2.Rc1#
- 2.Rc4#
- 1...Qc1
- 2.Rxc1#
- 1...Qd1
- 2.Rc1#
- 1...Qf1
- 2.Rc1#
- 2.Re2#
- 1...Qh3
- 2.Rc1#
- 1...Bd2
- 2.Rc1#
- 2.Rxd2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...e2
- 2.Rc1#
- 2.Rd2#
- 2.Rxe2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...f2
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rxf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Qh2+!
- threat
- 1.Kd4?
- Keys
- 1.Kxe3!
- threat
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Qc1+
- 2.Rxc1#
- 1...Qe1+
- 2.Re2#
- 1...Qg1+
- 2.Rf2#
- 1...Rxb3+
- 2.Rc3#
- 1...Bd2+
- 2.Rxd2#
- 1...Bb6+
- 2.Rc5#
- 1...Qxg2
- 2.Rc1#
- 2.Rxg2#
- 1...Rxa4
- 2.Bc3#
- 2.Bd4#
- 2.Be5#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 2.Rc1#
- 2.Rc4#
- 1...Qd1
- 2.Rc1#
- 1...Qf1
- 2.Rc1#
- 2.Re2#
- 1...Qh3
- 2.Rc1#
- 1...Bc3
- 2.Sxc3#
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcxc3#
- 1...Bc7
- 2.Sc3#
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rxc7#
- 1...f2
- 2.Rc1#
- 2.Rd2#
- 2.Re2#
- 2.Rxf2#
- 2.Rcc3#
- 2.Rc4#
- 2.Rc5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- threat
- 1.Kxe3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 7
- Sets
- Q(b);N_GUARD,XP(D)::R1(C)
- Q(b);N_GUARD::R1(C),XQ(b)
- Q(b);N_GUARD::R1(C)
- R(d);CHECK,N_GUARD,XS(F)::R(E)+B(B)
- B(h);S_CUTQ(b)::R1(C)
- B(h);N_GUARD::S(F),XB(h)
- B(h);N_GUARD::S(F)
- Tries
- Try
- K(G);P-FLIGHT
- Threat
- DUALS(10)
- Vars
- R(d);CHECK,XS(F)::B(H)+R(C)
- B(h);CHECK::B(H)+R(C)
- Q(b);::B(H)+R(C),DCHECK,XQ(b)
- Q(b);::B(H)+R(C),DCHECK
- Refutation
- Q(b);CHECK
- Try
- K(G);P-FLIGHT
- Threat
- DUALS(10)
- Vars
- B(h);CHECK::B(H)+R(C),XB(h)
- Q(b);::B(H)+R(C),DCHECK,XQ(b)
- Q(b);::B(H)+R(C),DCHECK
- Refutation
- Q(b);CHECK
- Try
- K(G);S_FLIGHT
- Threat
- DUALS(10)
- Vars
- Q(b);::B(H)+R(C),DCHECK,XQ(b)
- Q(b);::B(H)+R(C),DCHECK
- Refutation
- Q(b);CHECK
- Try
- K(G);P-FLIGHT
- Threat
- DUALS(10)
- Vars
- B(h);CHECK::B(H)+R(C),XB(h)
- Q(b);::B(H)+R(C),DCHECK,XQ(b)
- Q(b);::B(H)+R(C),DCHECK
- Refutation
- Q(b);CHECK
- Try
- Actual
- K(G);P-FLIGHT,P_SPINR(E),XP(e)
- Threat
- DUALS(10)
- Vars
- Q(b);CHECK::B(H)+R(C),DCHECK,XQ(b)
- Q(b);CHECK::B(H)+R(C)
- R(d);CHECK,XR(E)::B(H)+R(C)
- B(h);CHECK::B(H)+R(C),XB(h)
- B(h);CHECK::B(H)+R(C)
- Q(b);::B(H)+R(C),DCHECK
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).