MESON Chess Problem Database
Problem Display
PID: 152770 (1bnN3K/rp4Q1/1n1kPP2/3pp3/1P1N4/3b4/8/8 w - - 0 1)
Laws, Benjamin Glover
Good Companions (December), 1915
#2
7 + 9
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sxb7#
- 1...Ra2
- 2.Sxb7#
- 1...Ra3
- 2.Sxb7#
- 1...Ra4
- 2.Sxb7#
- 1...Ra5
- 2.Sxb7#
- 1...Ra6
- 2.Sxb7#
- 1...Ra8
- 2.Sxb7#
- 1...Bb1
- 2.Sb5#
- 1...Bf1
- 2.Sf5#
- 1...Bc2
- 2.Sb5#
- 1...Be2
- 2.Sf5#
- 1...Bc4
- 2.Sf5#
- 1...Be4
- 2.Sb5#
- 1...Bb5
- 2.Sxb5#
- 2.Sf5#
- 1...Bf5
- 2.Sb5#
- 2.Sxf5#
- 1...Ba6
- 2.Sf5#
- 1...Bg6
- 2.Sb5#
- 1...Bh7
- 2.Sb5#
- 1...Bc7
- 2.Sf7#
- 1...Sa4
- 2.Qd7#
- 1...Sc4
- 2.Sb5#
- 2.Qd7#
- 1...Sd7
- 2.Qxd7#
- 1...Sa8
- 2.Qd7#
- 1...Se7
- 2.Qxe7#
- 1...exd4
- 2.Qg3#
- 1...e4
- 2.Qg3#
- 1...Ra1
- Tries
- 1.Kg8?
- 1...Se7+
- 2.Qxe7#
- 1...exd4
- 2.Qg3#
- 1...Sd7
- 2.Qxd7#
- 1...e4
- 2.Qg3#
- 1...Ra1
- 2.Sxb7#
- 1...Ra2
- 2.Sxb7#
- 1...Ra3
- 2.Sxb7#
- 1...Ra4
- 2.Sxb7#
- 1...Ra5
- 2.Sxb7#
- 1...Ra6
- 2.Sxb7#
- 1...Ra8
- 2.Sxb7#
- 1...Bb1
- 2.Sb5#
- 1...Bf1
- 2.Sf5#
- 1...Bc2
- 2.Sb5#
- 1...Be2
- 2.Sf5#
- 1...Bc4
- 2.Sf5#
- 1...Be4
- 2.Sb5#
- 1...Bb5
- 2.Sxb5#
- 2.Sf5#
- 1...Bf5
- 2.Sb5#
- 2.Sxf5#
- 1...Ba6
- 2.Sf5#
- 1...Bg6
- 2.Sb5#
- 1...Bc7
- 2.Sf7#
- 1...Sa4
- 2.Qd7#
- 1...Sc4
- 2.Sb5#
- 2.Qd7#
- 1...Sa8
- 2.Qd7#
- 1...Bh7+!
- 1...Se7+
- 1.Qf8+?
- 1...Se7
- 2.Qxe7#
- 1...Kc7!
- 1...Se7
- 1.Qc7+?
- 1...Bxc7
- 2.Sf7#
- 1...Kxc7!
- 1...Bxc7
- 1.Kg8?
- Keys
- 1.Qh7!
- 1...Bxh7
- 2.Sb5#
- 1...exd4
- 2.Qh2#
- 1...Sd7
- 2.Qxd7#
- 1...Se7
- 2.Qxe7#
- 1...e4
- 2.Qh2#
- 1...Ra1
- 2.Sxb7#
- 1...Ra2
- 2.Sxb7#
- 1...Ra3
- 2.Sxb7#
- 1...Ra4
- 2.Sxb7#
- 1...Ra5
- 2.Sxb7#
- 1...Ra6
- 2.Sxb7#
- 1...Ra8
- 2.Sxb7#
- 1...Bb1
- 2.Sb5#
- 1...Bf1
- 2.Sf5#
- 1...Bc2
- 2.Sb5#
- 1...Be2
- 2.Sf5#
- 1...Bc4
- 2.Sf5#
- 1...Be4
- 2.Sb5#
- 1...Bb5
- 2.Sxb5#
- 2.Sf5#
- 1...Bf5
- 2.Sb5#
- 2.Sxf5#
- 1...Ba6
- 2.Sf5#
- 1...Bg6
- 2.Sb5#
- 1...Bc7
- 2.Sf7#
- 1...Sa4
- 2.Qd7#
- 1...Sc4
- 2.Sb5#
- 2.Qd7#
- 1...Sa8
- 2.Qd7#
- 1...Bxh7
- 1.Qh7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(f);N_GUARD::S(F),XP(g)
- B(a);N_GUARD::S(B)
- B(h);SBLOCK::S(F)
- S(d);N_GUARD::QAR1(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- S(i);N_GUARD::QAB1(E),XS(i)
- P(c);OGATEB,XS(B)::QAB(E)
- P(c);OGATEB::QAB(E)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- S(i);CHECK,N_GUARD::QAB1(E),XS(i)
- P(c);OGATEB,XS(B)::QAB(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- P(c);OGATEB::QAB(E)
- R(f);N_GUARD::S(F),XP(g)
- B(a);N_GUARD::S(B)
- B(h);SBLOCK::S(F)
- S(d);N_GUARD::QAR1(E)
- Refutation
- B(a);CHECK
- Try
- Q(E);CHECK
- Vars
- S(i);N_GUARD,P_SPINS(i)::QAB1(E),XS(i)
- Refutation
- K(e);S_FLIGHT
- Try
- Q(E);CHECK
- Vars
- B(h);SBLOCK,XQ(E)::S(F)
- Refutation
- K(e);S_FLIGHT,XQ(E)
- Try
- Actual
- Q(E);
- Vars
- B(a);N_GUARD,XQ(E)::S(B)
- P(c);OGATEB,XS(B)::QAB(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- S(i);N_GUARD::QAB1(E),XS(i)
- P(c);OGATEB::QAB(E)
- R(f);N_GUARD::S(F),XP(g)
- B(a);N_GUARD::S(B)
- B(h);SBLOCK::S(F)
- S(d);N_GUARD::QAR1(E)
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).