MESON Chess Problem Database
Problem Display
PID: 211847 (n6q/Q2p1n2/1pkp4/1N6/4P3/BR6/1p6/1K1R4 w - - 0 1)
Lewis, Robert Tony
The Problemist, 1986
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Qc3
- 2.Qxa8#
- 1...Qd4
- 2.Sxd4#
- 2.Qxa8#
- 1...Qe5
- 2.Qxa8#
- 1...Qf6
- 2.Qxa8#
- 1...Qg7
- 2.Qxa8#
- 1...Qh1
- 2.Sd4#
- 2.Qxa8#
- 1...Qh2
- 2.Sd4#
- 2.Qxa8#
- 1...Qh3
- 2.Sd4#
- 2.Qxa8#
- 1...Qh4
- 2.Sd4#
- 2.Qxa8#
- 1...Qh5
- 2.Sd4#
- 2.Qxa8#
- 1...Qh6
- 2.Sd4#
- 2.Qxa8#
- 1...Qh7
- 2.Sd4#
- 2.Qxa8#
- 1...Qb8
- 2.Sd4#
- 1...Qc8
- 2.Sd4#
- 1...Qd8
- 2.Sd4#
- 1...Qe8
- 2.Sd4#
- 1...Qf8
- 2.Sd4#
- 1...Qg8
- 2.Sd4#
- 1...Se5
- 2.Sd4#
- 2.Rxd6#
- 1...Sg5
- 2.Rxd6#
- 1...Sh6
- 2.Rxd6#
- 1...Sd8
- 2.Rxd6#
- 1...Sc7
- 2.Qxc7#
- 1...d5
- 2.exd5#
- 1...Qc3
- Tries
- 1.Sxd6?
- threat
- 2.Qb7#
- 1...Sxd6
- 2.Rxd6#
- 1...Qb8
- 2.Rc3#
- 1...Qc8
- 2.Rc3#
- 1...Sd8!
- threat
- 1.Rd2?
- 1...Sg5
- 2.Rxd6#
- 1...Qc3
- 2.Qxa8#
- 1...Qd4
- 2.Sxd4#
- 2.Qxa8#
- 1...Qe5
- 2.Qxa8#
- 1...Qf6
- 2.Qxa8#
- 1...Qg7
- 2.Qxa8#
- 1...Qh2
- 2.Sd4#
- 2.Qxa8#
- 1...Qh3
- 2.Sd4#
- 2.Qxa8#
- 1...Qh4
- 2.Sd4#
- 2.Rc2#
- 2.Qxa8#
- 1...Qh5
- 2.Sd4#
- 2.Qxa8#
- 1...Qh6
- 2.Sd4#
- 2.Rc2#
- 2.Qxa8#
- 1...Qh7
- 2.Sd4#
- 2.Rc2#
- 2.Qxa8#
- 1...Qb8
- 2.Sd4#
- 2.Rc2#
- 1...Qc8
- 2.Sd4#
- 2.Rc2#
- 1...Qd8
- 2.Sd4#
- 2.Rc2#
- 1...Qe8
- 2.Sd4#
- 2.Rc2#
- 1...Qf8
- 2.Sd4#
- 2.Rc2#
- 1...Qg8
- 2.Sd4#
- 2.Rc2#
- 1...Se5
- 2.Sd4#
- 2.Rxd6#
- 1...Sh6
- 2.Rxd6#
- 1...Sd8
- 2.Rxd6#
- 1...Sc7
- 2.Qxc7#
- 1...d5
- 2.exd5#
- 1...Qh1+!
- 1...Sg5
- 1.Rdd3?
- 1...Sg5
- 2.Rxd6#
- 1...Qc3
- 2.Rdxc3#
- 2.Qxa8#
- 1...Qd4
- 2.Sxd4#
- 2.Qxa8#
- 1...Qe5
- 2.Qxa8#
- 1...Qf6
- 2.Qxa8#
- 1...Qg7
- 2.Qxa8#
- 1...Qh2
- 2.Sd4#
- 2.Rdc3#
- 2.Qxa8#
- 1...Qh3
- 2.Sd4#
- 2.Qxa8#
- 1...Qh4
- 2.Sd4#
- 2.Rdc3#
- 2.Qxa8#
- 1...Qh5
- 2.Sd4#
- 2.Qxa8#
- 1...Qh6
- 2.Sd4#
- 2.Rdc3#
- 2.Qxa8#
- 1...Qh7
- 2.Sd4#
- 2.Rdc3#
- 2.Qxa8#
- 1...Qb8
- 2.Sd4#
- 2.Rdc3#
- 1...Qc8
- 2.Sd4#
- 2.Rdc3#
- 1...Qd8
- 2.Sd4#
- 2.Rdc3#
- 1...Qe8
- 2.Sd4#
- 2.Rdc3#
- 1...Qf8
- 2.Sd4#
- 2.Rdc3#
- 1...Qg8
- 2.Sd4#
- 2.Rdc3#
- 1...Se5
- 2.Sd4#
- 2.Rxd6#
- 1...Sh6
- 2.Rxd6#
- 1...Sd8
- 2.Rxd6#
- 1...Sc7
- 2.Qxc7#
- 1...d5
- 2.exd5#
- 1...Qh1+!
- 1...Sg5
- 1.Rd4?
- threat
- 2.Rc4#
- 1...Qxd4
- 2.Sxd4#
- 2.Qxa8#
- 1...Qe5
- 2.Qxa8#
- 1...Qh5
- 2.Qxa8#
- 1...Se5
- 2.Rxd6#
- 1...d5
- 2.exd5#
- 1...Qh1+!
- threat
- 1.Rd5?
- 1...Sg5
- 2.Rxd6#
- 1...Qc3
- 2.Rxc3#
- 2.Qxa8#
- 1...Qd4
- 2.Sxd4#
- 2.Qxa8#
- 1...Qe5
- 2.Qxa8#
- 1...Qf6
- 2.Qxa8#
- 1...Qg7
- 2.Qxa8#
- 1...Qh2
- 2.Sd4#
- 2.Rc3#
- 2.Qxa8#
- 1...Qh3
- 2.Sd4#
- 2.Qxa8#
- 1...Qh4
- 2.Sd4#
- 2.Rc3#
- 2.Qxa8#
- 1...Qh5
- 2.Sd4#
- 2.Rc3#
- 2.Qxa8#
- 1...Qh6
- 2.Sd4#
- 2.Rc3#
- 2.Qxa8#
- 1...Qh7
- 2.Sd4#
- 2.Rc3#
- 2.Qxa8#
- 1...Qb8
- 2.Sd4#
- 2.Rc3#
- 1...Qc8
- 2.Sd4#
- 2.Rc3#
- 1...Qd8
- 2.Sd4#
- 2.Rc3#
- 1...Qe8
- 2.Sd4#
- 2.Rc3#
- 1...Qf8
- 2.Sd4#
- 2.Rc3#
- 1...Qg8
- 2.Sd4#
- 2.Rc3#
- 1...Se5
- 2.Sd4#
- 2.Rxd6#
- 1...Sh6
- 2.Rxd6#
- 1...Sd8
- 2.Rxd6#
- 1...Sc7
- 2.Qxc7#
- 1...Qh1+!
- 1...Sg5
- 1.Rxb2?
- 1...Sg5
- 2.Rxd6#
- 1...Qc3
- 2.Qxa8#
- 1...Qd4
- 2.Sxd4#
- 2.Qxa8#
- 1...Qe5
- 2.Qxa8#
- 1...Qf6
- 2.Qxa8#
- 1...Qg7
- 2.Qxa8#
- 1...Qh1
- 2.Sd4#
- 2.Qxa8#
- 1...Qh2
- 2.Sd4#
- 2.Qxa8#
- 1...Qh3
- 2.Sd4#
- 2.Qxa8#
- 1...Qh4
- 2.Sd4#
- 2.Rc1#
- 2.Qxa8#
- 1...Qh5
- 2.Sd4#
- 2.Qxa8#
- 1...Qh6
- 2.Sd4#
- 2.Qxa8#
- 1...Qh7
- 2.Sd4#
- 2.Rc1#
- 2.Qxa8#
- 1...Qb8
- 2.Sd4#
- 2.Rc1#
- 1...Qc8
- 2.Sd4#
- 2.Rc1#
- 1...Qd8
- 2.Sd4#
- 2.Rc1#
- 1...Qe8
- 2.Sd4#
- 2.Rc1#
- 1...Qf8
- 2.Sd4#
- 2.Rc1#
- 1...Qg8
- 2.Sd4#
- 2.Rc1#
- 1...Se5
- 2.Sd4#
- 2.Rxd6#
- 1...Sh6
- 2.Rxd6#
- 1...Sd8
- 2.Rxd6#
- 1...Sc7
- 2.Qxc7#
- 1...d5
- 2.exd5#
- 1...Qxb2+!
- 1...Sg5
- 1.Rc3+?
- 1...Kxb5
- 2.Rd5#
- 1...Qxc3!
- 1...Kxb5
- 1.Sxd6?
- Keys
- 1.Qa6!
- 1...Sg5
- 2.Rxd6#
- 1...Qc3
- 2.Rxc3#
- 2.Qxa8#
- 1...Qd4
- 2.Qxa8#
- 1...Qe5
- 2.Qxa8#
- 1...Qf6
- 2.Qxa8#
- 1...Qg7
- 2.Qxa8#
- 1...Qh1
- 2.Rc3#
- 2.Qxa8#
- 1...Qh2
- 2.Rc3#
- 2.Qxa8#
- 1...Qh3
- 2.Qxa8#
- 1...Qh4
- 2.Rc3#
- 2.Qxa8#
- 1...Qh5
- 2.Qxa8#
- 1...Qh6
- 2.Rc3#
- 2.Qxa8#
- 1...Qh7
- 2.Rc3#
- 2.Qxa8#
- 1...Qb8
- 2.Rc3#
- 1...Qc8
- 2.Rc3#
- 1...Qd8
- 2.Rc3#
- 1...Qe8
- 2.Rc3#
- 1...Qf8
- 2.Rc3#
- 1...Qg8
- 2.Rc3#
- 1...Se5
- 2.Rxd6#
- 1...Sh6
- 2.Rxd6#
- 1...Sd8
- 2.Rxd6#
- 1...Sc7
- 2.Sa7#
- 1...d5
- 2.exd5#
- 1...Sg5
- 1.Qa6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- Q(h);N_GUARD::QAB(G),XS(g)
- Q(h);N_GUARD::S(F)
- S(f);N_GUARD::R1(B),XP(d)
- S(g);N_GUARD::QAR1(G),XS(g)
- P(d);OGATE::P(E),XP(d)
- Tries
- Try
- S(F);XP(d)
- Threat
- QAB1(G)
- Vars
- S(f);OGATE,XS(F)::R1(B),XS(f)
- Q(h);N_GUARD::R(D)
- Refutation
- S(f);
- Try
- R(B);
- Vars
- S(f);N_GUARD::R1(B),XP(d)
- Q(h);N_GUARD::QAB(G),XS(g)
- S(g);N_GUARD::QAR1(G),XS(g)
- P(d);OGATE::P(E),XP(d)
- Refutation
- Q(h);CHECK
- Try
- R(B);
- Vars
- S(f);N_GUARD::R1(B),XP(d)
- Q(h);N_GUARD::QAB(G),XS(g)
- S(g);N_GUARD::QAR1(G),XS(g)
- P(d);OGATE::P(E),XP(d)
- Refutation
- Q(h);CHECK
- Try
- R(B);
- Threat
- R(B)
- Vars
- Q(h);N_GUARD::QAB(G),XS(g)
- S(f);N_GUARD::R1(B),XP(d)
- P(d);OGATE::P(E),XP(d)
- Refutation
- Q(h);CHECK
- Try
- R(B);
- Vars
- S(f);N_GUARD::R1(B),XP(d)
- Q(h);N_GUARD::QAB(G),XS(g)
- S(g);N_GUARD::QAR1(G),XS(g)
- Refutation
- Q(h);CHECK
- Try
- R(D);XP(a)
- Vars
- S(f);N_GUARD::R1(B),XP(d)
- Q(h);N_GUARD::QAB(G),XS(g)
- S(g);N_GUARD::QAR1(G),XS(g)
- P(d);OGATE::P(E),XP(d)
- Refutation
- Q(h);CHECK,XR(D)
- Try
- R(D);CHECK
- Vars
- K(c);S_FLIGHT,XS(F)::R(B)
- Refutation
- Q(h);XR(D)
- Try
- Actual
- Q(G);P_PINP(b)
- Vars
- S(f);N_GUARD::R1(B),XP(d)
- Q(h);N_GUARD::QAB(G),XS(g)
- Q(h);N_GUARD::R(D)
- S(g);SBLOCK::S(F)
- P(d);OGATE::P(E),XP(d)
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).