MESON Chess Problem Database
Problem Display
PID: 21286 (8/2Np4/1n6/r1P2Qp1/2pkN1np/3P3R/BP2P3/6K1 w - - 0 1)
Booth, David (Jr)
2nd Prize, Chess Amateur (The), 1918
#2
10 + 8
| 2681 | All Change Here! | 1919 |
| 133 | The Problemist Supplement | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Rxa2
- 2.Sb5#
- 1...Ra3
- 2.Sb5#
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Rxc5
- 2.Qxc5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Sf2
- 2.Qf6#
- 1...Sh2
- 2.Qf6#
- 1...Se3
- 2.Qf6#
- 1...Se5
- 2.Qf2#
- 1...Sf6
- 2.Qxf6#
- 1...Sh6
- 2.Qf6#
- 1...Sa4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...cxd3
- 2.Rxd3#
- 1...c3
- 2.bxc3#
- 1...d5
- 2.Se6#
- 1...d6
- 2.Se6#
- 1...Rxa2
- Tries
- 1.Kh1?
- 1...Rxa2
- 2.Sb5#
- 1...Rxc5
- 2.Qxc5#
- 1...cxd3
- 2.Rxd3#
- 1...Ra3
- 2.Sb5#
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Sh2
- 2.Qf6#
- 1...Se3
- 2.Qf6#
- 1...Se5
- 2.Qf2#
- 1...Sf6
- 2.Qxf6#
- 1...Sh6
- 2.Qf6#
- 1...Sa4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...c3
- 2.bxc3#
- 1...d5
- 2.Se6#
- 1...d6
- 2.Se6#
- 1...Sf2+!
- 1...Rxa2
- 1.Kg2?
- 1...Rxa2
- 2.Sb5#
- 1...Rxc5
- 2.Qxc5#
- 1...cxd3
- 2.Rxd3#
- 1...Ra3
- 2.Sb5#
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Sf2
- 2.Qf6#
- 1...Sh2
- 2.Qf6#
- 1...Se5
- 2.Qf2#
- 1...Sf6
- 2.Qxf6#
- 1...Sh6
- 2.Qf6#
- 1...Sa4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...c3
- 2.bxc3#
- 1...d5
- 2.Se6#
- 1...d6
- 2.Se6#
- 1...Se3+!
- 1...Rxa2
- 1.Sc3?
- 1...Rxa2
- 2.S3b5#
- 2.S7b5#
- 1...Rxc5
- 2.Qe4#
- 1...cxd3
- 2.Rxd3#
- 1...Se5
- 2.Qf2#
- 1...Sd5
- 2.Qxd5#
- 1...d5
- 2.Se6#
- 1...Ra3
- 2.S3b5#
- 2.S7b5#
- 1...Ra4
- 2.S3b5#
- 2.S7b5#
- 1...Rb5
- 2.S3xb5#
- 2.S7xb5#
- 1...Ra6
- 2.S3b5#
- 2.S7b5#
- 1...Ra7
- 2.S3b5#
- 2.S7b5#
- 1...Ra8
- 2.S3b5#
- 2.S7b5#
- 1...Sf2
- 2.e3#
- 1...Sh2
- 2.e3#
- 1...Sf6
- 2.e3#
- 1...Sh6
- 2.e3#
- 1...Sa4
- 2.Qd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...d6
- 2.Se6#
- 1...Se3!
- 1...Rxa2
- 1.Sxg5?
- 1...Rxa2
- 2.Sb5#
- 1...Rxc5
- 2.Qe4#
- 2.Qf4#
- 1...cxd3
- 2.Rxd3#
- 1...Se5
- 2.Qf2#
- 1...Sd5
- 2.Qxd5#
- 1...d5
- 2.Sge6#
- 2.Sce6#
- 1...Se3
- 2.Sf3#
- 1...Ra3
- 2.Sb5#
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Sf2
- 2.e3#
- 1...Sh2
- 2.e3#
- 1...Sf6
- 2.e3#
- 1...Sh6
- 2.e3#
- 1...Sa4
- 2.Qd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...d6
- 2.Sge6#
- 2.Sce6#
- 1...c3!
- 1...Rxa2
- 1.Bb1?
- 1...Rxc5
- 2.Qxc5#
- 1...Se3
- 2.Qf6#
- 1...Ra1
- 2.Sb5#
- 1...Ra2
- 2.Sb5#
- 1...Ra3
- 2.Sb5#
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Sf2
- 2.Qf6#
- 2.e3#
- 1...Sh2
- 2.Qf6#
- 2.e3#
- 1...Se5
- 2.Qf2#
- 2.e3#
- 1...Sf6
- 2.Qxf6#
- 2.e3#
- 1...Sh6
- 2.Qf6#
- 2.e3#
- 1...Sa4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...c3
- 2.bxc3#
- 1...d5
- 2.Se6#
- 1...d6
- 2.Se6#
- 1...cxd3!
- 1...Rxc5
- 1.Bxc4?
- 1...Rxc5
- 2.Qxc5#
- 1...Sxc4
- 2.Qd5#
- 1...Se3
- 2.Qf6#
- 1...Ra2
- 2.Sb5#
- 1...Ra3
- 2.Sb5#
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Sf2
- 2.Qf6#
- 2.e3#
- 1...Sh2
- 2.Qf6#
- 2.e3#
- 1...Se5
- 2.Qf2#
- 2.e3#
- 1...Sf6
- 2.Qxf6#
- 2.e3#
- 1...Sh6
- 2.Qf6#
- 2.e3#
- 1...Sa4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...d5
- 2.Se6#
- 1...d6
- 2.Se6#
- 1...Ra1+!
- 1...Rxc5
- 1.Qxg5?
- 1...Rxa2
- 2.Sb5#
- 1...Rxc5
- 2.Qxc5#
- 1...Se3
- 2.Qf6#
- 2.Qg7#
- 1...Ra3
- 2.Sb5#
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Sf2
- 2.Qf6#
- 2.Qg7#
- 1...Sh2
- 2.Qf6#
- 2.Qg7#
- 1...Se5
- 2.Qe3#
- 1...Sf6
- 2.Qxf6#
- 1...Sh6
- 2.Qf6#
- 2.Qg7#
- 1...Sa4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...c3
- 2.bxc3#
- 1...d5
- 2.Se6#
- 1...d6
- 2.Se6#
- 1...cxd3!
- 1...Rxa2
- 1.Qf6+?
- 1...Se5
- 2.Qf2#
- 1...Sxf6!
- 1...Se5
- 1.Kh1?
- Keys
- 1.Sd2!
- 1...Rxa2
- 2.Sb5#
- 1...Rxc5
- 2.Qe4#
- 1...cxd3
- 2.Rxd3#
- 1...Se5
- 2.Qf2#
- 1...Sd5
- 2.Qxd5#
- 1...d5
- 2.Se6#
- 1...Ra3
- 2.Sb5#
- 1...Ra4
- 2.Sb5#
- 1...Rb5
- 2.Sxb5#
- 1...Ra6
- 2.Sb5#
- 1...Ra7
- 2.Sb5#
- 1...Ra8
- 2.Sb5#
- 1...Sf2
- 2.e3#
- 1...Sh2
- 2.e3#
- 1...Se3
- 2.Sf3#
- 1...Sf6
- 2.e3#
- 1...Sh6
- 2.e3#
- 1...Sa4
- 2.Qd5#
- 1...Sa8
- 2.Qd5#
- 1...Sc8
- 2.Qd5#
- 1...c3
- 2.Sb3#
- 1...d6
- 2.Se6#
- 1...Rxa2
- 1.Sd2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 7
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(e);N_GUARD,XB(B)::S(J)
- R(e);N_GUARD::S(J)
- R(e);N_GUARD::S(J),XR(e)
- R(e);OGATE,XP(H)::QAB1(I),XR(e)
- S(c);N_GUARD::QAB(I)
- S(c);N_GUARD,SBLOCK::QAB(I)
- S(c);N_GUARD::QAB(I),XS(c)
- S(g);N_GUARD::QAR1(I)
- S(g);N_GUARD::QAR1(I),XS(g)
- P(a);OGATE,XP(E)::R1(F),XP(a)
- P(a);OGATE::P(C),XP(a)
- P(h);N_GUARD::S(J)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- R(e);N_GUARD,XB(B)::S(J)
- R(e);OGATE,XP(H)::QAB1(I),XR(e)
- P(a);OGATE,XP(E)::R1(F),XP(a)
- R(e);N_GUARD::S(J)
- R(e);N_GUARD::S(J),XR(e)
- S(c);N_GUARD::QAB(I)
- S(c);N_GUARD,SBLOCK::QAB(I)
- S(c);N_GUARD::QAB(I),XS(c)
- S(g);N_GUARD::QAR1(I)
- S(g);N_GUARD::QAR1(I),XS(g)
- P(a);OGATE::P(C),XP(a)
- P(h);N_GUARD::S(J)
- Refutation
- S(c);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- R(e);N_GUARD,XB(B)::S(J)
- R(e);OGATE,XP(H)::QAB1(I),XR(e)
- P(a);OGATE,XP(E)::R1(F),XP(a)
- R(e);N_GUARD::S(J)
- R(e);N_GUARD::S(J),XR(e)
- S(c);N_GUARD::QAB(I)
- S(c);N_GUARD,SBLOCK::QAB(I)
- S(c);N_GUARD::QAB(I),XS(c)
- S(g);N_GUARD::QAR1(I)
- S(g);N_GUARD::QAR1(I),XS(g)
- P(a);OGATE::P(C),XP(a)
- P(h);N_GUARD::S(J)
- Refutation
- S(c);CHECK
- Try
- S(G);
- Vars
- R(e);SBLOCK,XP(H)::QAR1(I)
- P(a);OGATE,XP(E)::R1(F),XP(a)
- S(c);N_GUARD,SBLOCK::QAB(I)
- S(g);N_GUARD::QAR1(I),XS(g)
- P(h);N_GUARD::S(J)
- S(c);N_GUARD::P(D)
- S(g);N_GUARD::QAR1(I)
- Refutation
- S(c);
- Try
- S(G);XP(f)
- Vars
- R(e);N_GUARD,XB(B)::S(J)
- P(a);OGATE,XP(E)::R1(F),XP(a)
- S(c);N_GUARD,SBLOCK::QAB(I)
- S(g);N_GUARD::QAR1(I),XS(g)
- S(c);SBLOCK::S(G)
- R(e);N_GUARD::S(J)
- R(e);N_GUARD::S(J),XR(e)
- S(c);N_GUARD::P(D)
- S(g);N_GUARD::QAR1(I)
- Refutation
- P(a);
- Try
- B(B);
- Vars
- R(e);OGATE,XP(H)::QAB1(I),XR(e)
- S(c);N_GUARD::QAB(I)
- R(e);N_GUARD,P_PINB(B)::S(J)
- R(e);N_GUARD::S(J)
- R(e);N_GUARD::S(J),XR(e)
- S(g);N_GUARD::QAR1(I)
- S(g);N_GUARD::QAR1(I),XS(g)
- P(a);OGATE::P(C),XP(a)
- P(h);N_GUARD::S(J)
- Refutation
- P(a);XP(E)
- Try
- B(B);XP(a)
- Vars
- R(e);OGATE,XP(H)::QAB1(I),XR(e)
- S(g);N_GUARD,XB(B)::QAR1(I)
- S(c);N_GUARD::QAB(I)
- R(e);N_GUARD::S(J)
- R(e);N_GUARD::S(J),XR(e)
- S(g);N_GUARD::QAR1(I)
- S(g);N_GUARD::QAR1(I),XS(g)
- P(h);N_GUARD::S(J)
- Refutation
- R(e);CHECK
- Try
- Q(I);XP(f)
- Vars
- R(e);N_GUARD,XB(B)::S(J)
- R(e);OGATE,XP(H)::QAB1(I),XR(e)
- R(e);N_GUARD::S(J)
- R(e);N_GUARD::S(J),XR(e)
- S(c);N_GUARD,SBLOCK::QAB1(I)
- S(c);N_GUARD::QAB(I),XS(c)
- S(g);N_GUARD::QAR1(I)
- S(g);N_GUARD::QAR1(I),XS(g)
- P(a);OGATE::P(C),XP(a)
- P(h);N_GUARD::S(J)
- Refutation
- P(a);XP(E)
- Try
- Q(I);CHECK
- Vars
- S(c);N_GUARD,P_SPINS(c),SBLOCK::QAB(I)
- Refutation
- S(c);XQ(I)
- Try
- Actual
- S(G);
- Vars
- R(e);N_GUARD,XB(B)::S(J)
- R(e);SBLOCK,XP(H)::QAR1(I)
- P(a);OGATE,XP(E)::R1(F),XP(a)
- S(c);N_GUARD,SBLOCK::QAB(I)
- S(g);N_GUARD::QAR1(I),XS(g)
- P(h);N_GUARD::S(J)
- R(e);N_GUARD::S(J)
- R(e);N_GUARD::S(J),XR(e)
- S(c);N_GUARD::P(D)
- S(c);SBLOCK::S(G)
- S(g);N_GUARD::QAR1(I)
- P(a);N_GUARD::S(G)
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).