MESON Chess Problem Database
Problem Display
PID: 224728 (7B/2K5/1p2P1n1/2pk1P2/2N5/2QPp3/b1n1P3/1q6 w - - 0 1)
Decker, Adolfph L
Columbia Chess Chronicle, 1888
#2
8 + 8
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.Sxb6#
- 1...Qc1
- 2.Sxb6#
- 1...Qd1
- 2.Sxb6#
- 1...Qe1
- 2.Sxb6#
- 1...Qf1
- 2.Sxb6#
- 1...Qg1
- 2.Sxb6#
- 1...Qh1
- 2.Sxb6#
- 1...Bb3
- 2.Sxb6#
- 1...Bxc4
- 2.Qxc4#
- 1...Sa1
- 2.Sxe3#
- 1...Se1
- 2.Sxe3#
- 1...Sa3
- 2.Sxe3#
- 1...Sb4
- 2.Sxe3#
- 2.Sxb6#
- 1...Sd4
- 2.Sxe3#
- 1...Sf4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Se7
- 2.Qe5#
- 1...Sf8
- 2.Qe5#
- 1...Sxh8
- 2.Qe5#
- 1...b5
- 2.Sb6#
- 1...Qa1
- Tries
- 1.Qd4+?
- 1...Sxd4
- 2.Sxe3#
- 1...cxd4!
- 1...Sxd4
- 1.Qf6?
- threat
- 2.Qd8#
- 1...Se5
- 2.Qxe5#
- 1...Se7
- 2.Qe5#
- 1...Sf8
- 2.Qe5#
- 1...Qb5!
- threat
- 1.Qg7?
- threat
- 2.Qd7#
- 1...Se5
- 2.Qxe5#
- 1...Se7
- 2.Qe5#
- 2.Qg2#
- 1...Sf8
- 2.Qe5#
- 2.Qg2#
- 1...Qb5!
- threat
- 1.Qd4+?
- Keys
- 1.Qa1!
- 1...Qxa1
- 2.Sxb6#
- 1...Bxc4
- 2.Qa8#
- 1...Sxa1
- 2.Sxe3#
- 1...Sxh8
- 2.Qe5#
- 1...Qb2
- 2.Qh1#
- 1...Qc1
- 2.Sxb6#
- 1...Qd1
- 2.Sxb6#
- 1...Qe1
- 2.Sxb6#
- 1...Qf1
- 2.Sxb6#
- 1...Qg1
- 2.Sxb6#
- 1...Qh1
- 2.Sxb6#
- 2.Qxh1#
- 1...Qb3
- 2.Qh1#
- 1...Qb4
- 2.Qh1#
- 1...Qb5
- 2.Qh1#
- 1...Bb3
- 2.Sxb6#
- 2.Qa8#
- 1...Se1
- 2.Sxe3#
- 1...Sa3
- 2.Sxe3#
- 1...Sb4
- 2.Sxe3#
- 2.Sxb6#
- 1...Sd4
- 2.Sxe3#
- 1...Sf4
- 2.Qe5#
- 1...Sh4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...Se7
- 2.Qe5#
- 1...Sf8
- 2.Qe5#
- 1...b5
- 2.Sb6#
- 1...Qxa1
- 1.Qa1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- Q(a);N_GUARD::S(D),XP(g)
- B(b);S_CUTQ(a)::S(D),XP(g)
- B(b);OGATE,XS(D)::QAB1(B),XB(b)
- S(c);N_GUARD::S(D),XP(d)
- S(h);N_GUARD::QAR1(B)
- S(h);N_GUARD::QAR1(B),XS(h)
- S(h);N_GUARD,XB(H)::QAR1(B)
- P(g);S_CUTQ(a)::S(D)
- Tries
- Try
- Q(B);CHECK
- Vars
- S(c);XQ(B)::S(D),XP(d)
- Refutation
- P(e);XQ(B)
- Try
- Q(B);
- Threat
- QAR(B)
- Vars
- S(h);N_GUARD::QAR1(B),XS(h)
- S(h);N_GUARD::QAR1(B)
- Refutation
- Q(a);
- Try
- Q(B);
- Threat
- QAR2(B)
- Vars
- S(h);N_GUARD::QAR1(B),XS(h)
- Refutation
- Q(a);
- Try
- Actual
- Q(B);
- Vars
- Q(a);N_GUARD,XQ(B)::S(D),XP(g)
- B(b);OGATE,XS(D)::QAB(B)
- S(c);N_GUARD,XQ(B)::S(D),XP(d)
- S(h);N_GUARD,XB(H)::QAR1(B)
- Q(a);OGATE::QAB(B)
- Q(a);N_GUARD::S(D),XP(g)
- S(c);N_GUARD::S(D),XP(d)
- S(h);N_GUARD::QAR1(B)
- S(h);N_GUARD::QAR1(B),XS(h)
- P(g);S_CUTQ(a)::S(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).