MESON Chess Problem Database
Problem Display
PID: 2957 (n7/8/N2p4/1b3Q2/k1N4p/p1B4K/RpP5/1nb5 w - - 0 1)
Booth, David (Jr)
British Deaf Times, 1911
#2
7 + 9
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Bd2
- 2.Sxb2#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bg5
- 2.Sxb2#
- 1...Bh6
- 2.Sxb2#
- 1...Bxc4
- 2.Qa5#
- 1...Bxa6
- 2.Qa5#
- 1...Bc6
- 2.Qa5#
- 1...Bd7
- 2.Qxd7#
- 1...Be8
- 2.Qa5#
- 1...Sd2
- 2.Rxa3#
- 1...Sxc3
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...d5
- 2.Sc5#
- 1...Bd2
- Tries
- 1.Kg4?
- 1...Bxc4
- 2.Qa5#
- 1...Bxa6
- 2.Qa5#
- 1...Sxc3
- 2.Rxa3#
- 1...Bd2
- 2.Sxb2#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bg5
- 2.Sxb2#
- 1...Bh6
- 2.Sxb2#
- 1...Bc6
- 2.Qa5#
- 1...Bd7
- 2.Qxd7#
- 1...Be8
- 2.Qa5#
- 1...Sd2
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...d5
- 2.Sc5#
- 1...h3!
- 1...Bxc4
- 1.Kxh4?
- 1...Bxc4
- 2.Qa5#
- 1...Bxa6
- 2.Qa5#
- 1...Sxc3
- 2.Rxa3#
- 1...Bd2
- 2.Sxb2#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bh6
- 2.Sxb2#
- 1...Bc6
- 2.Qa5#
- 1...Bd7
- 2.Qxd7#
- 2.Qa5#
- 1...Be8
- 2.Qa5#
- 1...Sd2
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...d5
- 2.Sc5#
- 1...Bg5+!
- 1...Bxc4
- 1.Be1?
- 1...Bxc4
- 2.Qa5#
- 1...Bxa6
- 2.Qa5#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bg5
- 2.Sxb2#
- 1...Bh6
- 2.Sxb2#
- 1...Bc6
- 2.Qa5#
- 1...Bd7
- 2.Qxd7#
- 1...Be8
- 2.Qa5#
- 1...Sd2
- 2.Rxa3#
- 1...Sc3
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...d5
- 2.Sc5#
- 1...Bd2!
- 1...Bxc4
- 1.Bd2?
- 1...Bxc4
- 2.Qa5#
- 1...Bxa6
- 2.Qa5#
- 1...Sxd2
- 2.Rxa3#
- 1...Bc6
- 2.Qa5#
- 1...Bd7
- 2.Qxd7#
- 1...Be8
- 2.Qa5#
- 1...Sc3
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...d5
- 2.Sc5#
- 1...Bxd2!
- 1...Bxc4
- 1.Bb4?
- 1...Bxc4
- 2.Qa5#
- 1...Bxa6
- 2.Qa5#
- 1...Bd2
- 2.Sxb2#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bg5
- 2.Sxb2#
- 1...Bh6
- 2.Sxb2#
- 1...Bc6
- 2.Qa5#
- 1...Bd7
- 2.Qxd7#
- 1...Be8
- 2.Qa5#
- 1...Sd2
- 2.Rxa3#
- 1...Sc3
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...d5!
- 1...Bxc4
- 1.Qd7?
- 1...Sxc3
- 2.Rxa3#
- 1...Bc6
- 2.Qxc6#
- 1...d5
- 2.Sc5#
- 1...Bd2
- 2.Sxb2#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bg5
- 2.Sxb2#
- 1...Bh6
- 2.Sxb2#
- 1...Sd2
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...Bxd7+!
- 1...Sxc3
- 1.Qc5?
- threat
- 2.Qb4#
- 1...dxc5
- 2.Sxc5#
- 1...Bd7+!
- threat
- 1.Qd5?
- 1...Bxc4
- 2.Qxc4#
- 2.Qa5#
- 1...Bxa6
- 2.Qa5#
- 1...Sxc3
- 2.Rxa3#
- 1...Bd2
- 2.Sxb2#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bg5
- 2.Sxb2#
- 1...Bh6
- 2.Sxb2#
- 1...Bc6
- 2.Qxc6#
- 2.Qa5#
- 1...Be8
- 2.Qa5#
- 1...Sd2
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...Bd7+!
- 1...Bxc4
- 1.Qe5?
- 1...Bxc4
- 2.Qa5#
- 1...Bxa6
- 2.Qa5#
- 1...Sxc3
- 2.Rxa3#
- 1...dxe5
- 2.Sc5#
- 1...d5
- 2.Sc5#
- 1...Bd2
- 2.Sxb2#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bg5
- 2.Sxb2#
- 1...Bh6
- 2.Sxb2#
- 1...Bc6
- 2.Qa5#
- 1...Be8
- 2.Qa5#
- 2.Qxe8#
- 1...Sd2
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...Bd7+!
- 1...Bxc4
- 1.Qg5?
- 1...Bxg5
- 2.Sxb2#
- 1...Bxc4
- 2.Qa5#
- 1...Bxa6
- 2.Qa5#
- 1...Sxc3
- 2.Rxa3#
- 1...d5
- 2.Sc5#
- 1...Bd2
- 2.Sxb2#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bc6
- 2.Qa5#
- 1...Be8
- 2.Qa5#
- 1...Sd2
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...Bd7+!
- 1...Bxg5
- 1.Qh5?
- 1...Bxc4
- 2.Qa5#
- 1...Bxa6
- 2.Qa5#
- 1...Sxc3
- 2.Rxa3#
- 1...d5
- 2.Sc5#
- 1...Bd2
- 2.Sxb2#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bg5
- 2.Sxb2#
- 1...Bh6
- 2.Sxb2#
- 1...Bc6
- 2.Qa5#
- 1...Be8
- 2.Qxe8#
- 2.Qa5#
- 1...Sd2
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...Bd7+!
- 1...Bxc4
- 1.Kg4?
- Keys
- 1.Qc8!
- 1...Bd7+
- 2.Qxd7#
- 1...Bxc4
- 2.Qxc4#
- 1...Bxa6
- 2.Qxa6#
- 1...Sxc3
- 2.Rxa3#
- 1...Bc6
- 2.Qxc6#
- 1...Be8
- 2.Qxe8#
- 1...d5
- 2.Sc5#
- 1...Bd2
- 2.Sxb2#
- 1...Be3
- 2.Sxb2#
- 1...Bf4
- 2.Sxb2#
- 1...Bg5
- 2.Sxb2#
- 1...Bh6
- 2.Sxb2#
- 1...Sd2
- 2.Rxa3#
- 1...Sb6
- 2.Sxb6#
- 1...Sc7
- 2.Sb6#
- 1...Bd7+
- 1.Qc8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(b);N_GUARD::S(E),XP(c)
- B(g);OGATE,XS(E)::QAR1(F)
- B(g);OGATE,XS(G)::QAR1(F)
- B(g);OGATE::QAR1(F)
- B(g);OGATEB,P_PINQ(F)::QAB(F),XB(g)
- S(a);N_GUARD::R1(A),XP(d)
- S(a);N_GUARD,XB(C)::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(h);N_GUARD::S(G)
- Tries
- Try
- K(D);S_FLIGHT
- Vars
- B(g);OGATE,XS(E)::QAR1(F)
- B(g);OGATE,XS(G)::QAR1(F)
- S(a);N_GUARD,XB(C)::R1(A),XP(d)
- B(b);N_GUARD::S(E),XP(c)
- B(g);OGATE::QAR1(F)
- B(g);OGATEB,P_PINQ(F)::QAB(F),XB(g)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(h);N_GUARD::S(G)
- Refutation
- P(f);
- Try
- K(D);P-FLIGHT,XP(f)
- Vars
- B(g);OGATE,XS(E)::QAR1(F)
- B(g);OGATE,XS(G)::QAR1(F)
- S(a);N_GUARD,XB(C)::R1(A),XP(d)
- B(b);N_GUARD::S(E),XP(c)
- B(g);OGATE::QAR1(F)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(h);N_GUARD::S(G)
- Refutation
- B(b);CHECK
- Try
- B(C);
- Vars
- B(g);OGATE,XS(E)::QAR1(F)
- B(g);OGATE,XS(G)::QAR1(F)
- B(b);N_GUARD::S(E),XP(c)
- B(g);OGATE::QAR1(F)
- B(g);OGATEB,P_PINQ(F)::QAB(F),XB(g)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(h);N_GUARD::S(G)
- Refutation
- B(b);
- Try
- B(C);
- Vars
- B(g);OGATE,XS(E)::QAR1(F)
- B(g);OGATE,XS(G)::QAR1(F)
- S(a);N_GUARD,XB(C)::R1(A),XP(d)
- B(g);OGATE::QAR1(F)
- B(g);OGATEB,P_PINQ(F)::QAB(F),XB(g)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- P(h);N_GUARD::S(G)
- Refutation
- B(b);XB(C)
- Try
- B(C);
- Vars
- B(g);OGATE,XS(E)::QAR1(F)
- B(g);OGATE,XS(G)::QAR1(F)
- B(b);N_GUARD::S(E),XP(c)
- B(g);OGATE::QAR1(F)
- B(g);OGATEB,P_PINQ(F)::QAB(F),XB(g)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- Refutation
- P(h);
- Try
- Q(F);P_PINB(g)
- Vars
- S(a);N_GUARD,XB(C)::R1(A),XP(d)
- B(g);OGATEB::QAB(F),XB(g)
- P(h);N_GUARD::S(G)
- B(b);N_GUARD::S(E),XP(c)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- Refutation
- B(g);CHECK,N_SPINB(g),XQ(F)
- Try
- Q(F);
- Threat
- QAR1(F)
- Vars
- P(h);XQ(F)::S(G),XP(h)
- Refutation
- B(g);CHECK
- Try
- Q(F);
- Vars
- B(g);OGATE,XS(G)::QAR1(F)
- S(a);N_GUARD,XB(C)::R1(A),XP(d)
- B(b);N_GUARD::S(E),XP(c)
- B(g);OGATE::QAR1(F)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- Refutation
- B(g);CHECK
- Try
- Q(F);
- Vars
- B(g);OGATE,XS(E)::QAR1(F)
- B(g);OGATE,XS(G)::QAR1(F)
- S(a);N_GUARD,XB(C)::R1(A),XP(d)
- P(h);N_GUARD,XQ(F)::S(G)
- P(h);N_GUARD::S(G)
- B(b);N_GUARD::S(E),XP(c)
- B(g);OGATE::QAR1(F)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- Refutation
- B(g);CHECK
- Try
- Q(F);
- Vars
- B(b);N_GUARD,XQ(F)::S(E),XP(c)
- B(g);OGATE,XS(E)::QAR1(F)
- B(g);OGATE,XS(G)::QAR1(F)
- S(a);N_GUARD,XB(C)::R1(A),XP(d)
- P(h);N_GUARD::S(G)
- B(b);N_GUARD::S(E),XP(c)
- B(g);OGATE::QAR1(F)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- Refutation
- B(g);CHECK
- Try
- Q(F);
- Vars
- B(g);OGATE,XS(E)::QAR1(F)
- B(g);OGATE,XS(G)::QAR1(F)
- S(a);N_GUARD,XB(C)::R1(A),XP(d)
- P(h);N_GUARD::S(G)
- B(b);N_GUARD::S(E),XP(c)
- B(g);OGATE::QAR1(F)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(E)
- Refutation
- B(g);CHECK
- Try
- Actual
- Q(F);
- Vars
- B(g);CHECK,OGATEB::QAB(F),XB(g)
- B(g);OGATE,XS(E)::QAR2(F),XB(g)
- B(g);OGATE,XS(G)::QAR2(F),XB(g)
- S(a);N_GUARD,XB(C)::R1(A),XP(d)
- B(g);OGATEB::QAB(F),XB(g)
- P(h);N_GUARD::S(G)
- B(b);N_GUARD::S(E),XP(c)
- S(a);N_GUARD::R1(A),XP(d)
- S(i);N_GUARD::S(E),XS(i)
- S(i);N_GUARD::S(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).