MESON Chess Problem Database
Problem Display
PID: 3117 (8/pp6/kBp5/P1P5/P7/pQ1n4/pnN5/K7 w - - 0 1)
Pont, FJ
Source?, 1918
#2
7 + 8
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Qc4#
- 2.Qxd3#
- 1...Sxa4
- 2.Qc4#
- 2.Qxd3#
- 1...Sc4
- 2.Qxc4#
- 1...Sc1
- 2.Sb4#
- 1...Se1
- 2.Sb4#
- 1...Sf2
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Sf4
- 2.Sb4#
- 1...Sxc5
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...axb6
- 2.Qxb6#
- 1...Sd1
- Tries
- 1.Kxa2?
- 1...Sb4+
- 2.Sxb4#
- 1...Sxa4
- 2.Qc4#
- 2.Qxd3#
- 1...Sxc5
- 2.Sb4#
- 1...axb6
- 2.Qxb6#
- 1...Sd1
- 2.Qc4#
- 2.Qxd3#
- 1...Sc4
- 2.Qxc4#
- 1...Se1
- 2.Sb4#
- 1...Sf2
- 2.Sb4#
- 1...Sf4
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...Sc1+!
- 1...Sb4+
- 1.Qxa2?
- 1...Sxa4
- 2.Qc4#
- 1...Sxc5
- 2.Sb4#
- 1...Sc1
- 2.Sb4#
- 1...Sd1
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Se1
- 2.Sb4#
- 1...Sf2
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Sf4
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...axb6!
- 1...Sxa4
- 1.Qe6?
- 1...Sxa4
- 2.Qc4#
- 1...Sxc5
- 2.Sb4#
- 1...Sc1
- 2.Sb4#
- 1...Sd1
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Se1
- 2.Sb4#
- 1...Sf2
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Sf4
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...axb6!
- 1...Sxa4
- 1.Qf7?
- 1...Sxa4
- 2.Qc4#
- 1...Sxc5
- 2.Sb4#
- 1...Sc1
- 2.Sb4#
- 1...Sd1
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Se1
- 2.Sb4#
- 1...Sf2
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Sf4
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...axb6!
- 1...Sxa4
- 1.Qxb2?
- 1...Sxb2
- 2.Sb4#
- 1...Sxc5
- 2.Sb4#
- 1...axb6
- 2.Qxb6#
- 1...Sc1
- 2.Sb4#
- 1...Se1
- 2.Sb4#
- 1...Sf2
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Sf4
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...axb2+!
- 1...Sxb2
- 1.Qc3?
- 1...Sxa4
- 2.Qxd3#
- 2.Qc4#
- 1...Sxc5
- 2.Sb4#
- 1...Sc1
- 2.Sb4#
- 1...Sd1
- 2.Qxd3#
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Se1
- 2.Sb4#
- 1...Sf2
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Sf4
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...axb6!
- 1...Sxa4
- 1.Qxd3+?
- 1...Sc4
- 2.Sb4#
- 2.Qxc4#
- 1...Sxd3!
- 1...Sc4
- 1.Kxa2?
- Keys
- 1.Qg8!
- 1...Sxa4
- 2.Qc4#
- 1...Sxc5
- 2.Sb4#
- 1...axb6
- 2.Qa8#
- 1...Sc1
- 2.Sb4#
- 1...Sd1
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Se1
- 2.Sb4#
- 1...Sf2
- 2.Sb4#
- 1...Sb4
- 2.Sxb4#
- 1...Sf4
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...Sxa4
- 1.Qg8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(b);N_GUARD::QAB(C),XS(b)
- S(d);N_GUARD::S(B)
- S(d);N_GUARD::S(B),XS(d)
- S(d);N_GUARD,XP(F)::S(B)
- P(g);OGATE,XB(G)::QAR1(C),XP(g)
- Tries
- Try
- K(A);P-FLIGHT,XP(a)
- Vars
- S(d);CHECK,N_GUARD::S(B),XS(d)
- S(d);N_GUARD,XP(F)::S(B)
- P(g);OGATE,XB(G)::QAR1(C),XP(g)
- S(b);N_GUARD::QAB(C),XS(b)
- S(d);N_GUARD::S(B)
- Refutation
- S(d);CHECK
- Try
- Q(C);XP(a)
- Vars
- S(b);N_GUARD,XP(D)::QAB(C)
- S(d);N_GUARD,XP(F)::S(B)
- S(d);N_GUARD::S(B)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(d);N_GUARD::S(B),XS(d)
- Refutation
- P(g);XB(G)
- Try
- Q(C);
- Vars
- S(b);N_GUARD,XP(D)::QAB(C)
- S(d);N_GUARD,XP(F)::S(B)
- S(d);N_GUARD::S(B)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(d);N_GUARD::S(B),XS(d)
- Refutation
- P(g);XB(G)
- Try
- Q(C);
- Vars
- S(b);N_GUARD,XP(D)::QAB(C)
- S(d);N_GUARD,XP(F)::S(B)
- S(d);N_GUARD::S(B)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(d);N_GUARD::S(B),XS(d)
- Refutation
- P(g);XB(G)
- Try
- Q(C);XS(b)
- Vars
- S(d);N_GUARD,XQ(C)::S(B)
- S(d);N_GUARD,XP(F)::S(B)
- P(g);OGATE,XB(G)::QAR1(C),XP(g)
- S(d);N_GUARD::S(B)
- S(d);N_GUARD::S(B),XS(d)
- Refutation
- P(c);CHECK,XQ(C)
- Try
- Q(C);
- Vars
- S(d);N_GUARD,XP(F)::S(B)
- S(d);N_GUARD::S(B)
- S(b);N_GUARD::QAB(C),XS(b)
- S(d);N_GUARD::S(B),XS(d)
- Refutation
- P(g);XB(G)
- Try
- Q(C);CHECK,XS(d)
- Refutation
- S(b);XQ(C)
- Try
- Actual
- Q(C);
- Vars
- S(b);N_GUARD,XP(D)::QAB(C)
- S(d);N_GUARD,XP(F)::S(B)
- P(g);OGATEB,XB(G)::QAR2(C)
- S(d);N_GUARD::S(B)
- S(b);N_GUARD::QAB(C)
- S(b);N_GUARD::QAB(C),XS(b)
- S(d);N_GUARD::S(B),XS(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).