MESON Chess Problem Database
Problem Display
PID: 137435 (8/2N3p1/6K1/4k3/8/3Qn1P1/8/8 w - - 0 1)
Lester, William Edward
Chess Amateur (The), 1923
#2
4 + 3
| 5454 | Near Snap | 2010 |
| 6490 | yacpdb | 2010 |
SOLUTION
- SOUND
- Sets
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sc4
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sf5
- 2.Qd5#
- 1...Sd1
- Tries
- 1.Kg5?
- 1...Sd5
- 2.Qxd5#
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sc4
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sf5
- 2.Qd5#
- 1...g6!
- 1...Sd5
- 1.Kxg7?
- 1...Sd5
- 2.Qxd5#
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sc4
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sf5+!
- 1...Sd5
- 1.Qd2?
- 1...Sd5
- 2.Qxd5#
- 1...Sd1
- 2.Qf4#
- 2.Qd5#
- 1...Sf1
- 2.Qf4#
- 2.Qd5#
- 1...Sc2
- 2.Qf4#
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sc4
- 2.Qf4#
- 2.Qd5#
- 1...Sg4
- 2.Qf4#
- 2.Qd5#
- 1...Sf5
- 2.Qf4#
- 2.Qd5#
- 1...Ke4!
- 1...Sd5
- 1.Qd7?
- 1...Sd5
- 2.Qxd5#
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sc4
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sf5
- 2.Qd5#
- 1...Ke4!
- 1...Sd5
- 1.Qd8?
- 1...Sd5
- 2.Qxd5#
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sc4
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sf5
- 2.Qd5#
- 1...Ke4!
- 1...Sd5
- 1.Kg5?
- Keys
- 1.Sb5!
- 1...Ke6
- 2.Qd6#
- 1...Sd1
- 2.Qf5#
- 1...Sf1
- 2.Qf5#
- 1...Sc2
- 2.Qf5#
- 1...Sg2
- 2.Qf5#
- 1...Sc4
- 2.Qf5#
- 1...Sg4
- 2.Qf5#
- 1...Sd5
- 2.Qf5#
- 1...Sf5
- 2.Qxf5#
- 1...Ke6
- 1.Sb5!
This anticipates 23431(1926), 227679(1926), 135946(1969), 171356(1995), 171403(1995)
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAR1(A),XS(a)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- S(a);N_GUARD::QAR1(A),XS(a)
- S(a);N_GUARD::QAR1(A)
- Refutation
- P(c);
- Try
- K(C);P-FLIGHT,XP(c)
- Vars
- S(a);N_GUARD::QAR1(A),XS(a)
- S(a);N_GUARD::QAR1(A)
- Refutation
- S(a);CHECK
- Try
- Q(A);
- Vars
- S(a);N_GUARD::QAR1(A),XS(a)
- S(a);N_GUARD::QAR1(A)
- Refutation
- K(b);P-FLIGHT
- Try
- Q(A);
- Vars
- S(a);N_GUARD::QAR1(A),XS(a)
- S(a);N_GUARD::QAR1(A)
- Refutation
- K(b);P-FLIGHT
- Try
- Q(A);
- Vars
- S(a);N_GUARD::QAR1(A),XS(a)
- S(a);N_GUARD::QAR1(A)
- Refutation
- K(b);P-FLIGHT
- Try
- Actual
- S(D);
- Vars
- K(b);P-FLIGHT::QAR1(A)
- S(a);N_GUARD::QAR1(A)
- S(a);N_GUARD,SBLOCK::QAR1(A)
- S(a);N_GUARD::QAR1(A),XS(a)
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).