MESON Chess Problem Database
Problem Display
PID: 238989 (8/6K1/1N3Rp1/1pB1k3/6B1/1p2pbN1/1bn1Q3/4n3 w - - 0 1)
Petite, Efren
L'Italia Scacchistica, 2007
#2
7 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Bd4
- 2.Bd6#
- 1...Bd5
- 2.Sd7#
- 1...Sa1
- 2.Qxb2#
- 1...Sa3
- 2.Qxb2#
- 1...Sb4
- 2.Qxb2#
- 1...Sd4
- 2.Bd6#
- 1...Bd4
- Tries
- 1.Qd3?
- threat
- 2.Sd7#
- 2.Bd6#
- 2.Qd6#
- 1...Bxg4
- 2.Bd6#
- 2.Qe4#
- 2.Qd5#
- 2.Qd6#
- 1...Ba3
- 2.Sd7#
- 2.Qd6#
- 1...Bd4
- 2.Bd6#
- 1...Bd5
- 2.Sd7#
- 2.Bd6#
- 2.Qxd5#
- 1...Bc6
- 2.Bd6#
- 2.Qd6#
- 1...Sd4
- 2.Bd6#
- 1...Sxd3!
- threat
- 1.Qxf3?
- threat
- 2.Sd7#
- 2.Re6#
- 2.Qe4#
- 2.Qd5#
- 2.Qf4#
- 1...Sg2
- 2.Sd7#
- 2.Re6#
- 2.Qe4#
- 2.Qd5#
- 1...Sd3
- 2.Sd7#
- 2.Re6#
- 2.Qe4#
- 2.Qd5#
- 1...Sb4
- 2.Sd7#
- 2.Re6#
- 2.Qe4#
- 2.Qxe3#
- 2.Qf4#
- 1...Sd4
- 2.Sd7#
- 2.Bd6#
- 2.Qe4#
- 2.Qd5#
- 2.Qxe3#
- 2.Qf4#
- 1...g5
- 2.Sd7#
- 2.Re6#
- 2.Qe4#
- 2.Qd5#
- 2.Qf5#
- 1...Sxf3!
- threat
- 1.Qc4?
- threat
- 2.Sd7#
- 2.Bd6#
- 2.Re6#
- 2.Qe6#
- 2.Qf4#
- 1...Bxg4
- 2.Bd6#
- 2.Qd5#
- 2.Qe4#
- 2.Qf4#
- 1...Ba3
- 2.Sd7#
- 2.Re6#
- 2.Qe6#
- 2.Qf4#
- 1...Bd4
- 2.Sd7#
- 2.Bd6#
- 2.Qe6#
- 1...Be4
- 2.Sd7#
- 2.Bd6#
- 2.Qe6#
- 2.Qxe4#
- 1...Bd5
- 2.Sd7#
- 2.Bd6#
- 2.Qxd5#
- 2.Qf4#
- 1...Bc6
- 2.Bd6#
- 2.Re6#
- 2.Qe6#
- 2.Qf4#
- 1...Sg2
- 2.Sd7#
- 2.Bd6#
- 2.Re6#
- 2.Qe6#
- 1...Sd3
- 2.Sd7#
- 2.Bd6#
- 2.Re6#
- 2.Qe6#
- 1...Sd4
- 2.Sd7#
- 2.Bd6#
- 1...g5
- 2.Sd7#
- 2.Bd6#
- 2.Rf5#
- 2.Re6#
- 2.Qe6#
- 1...bxc4!
- threat
- 1.Qxb5?
- threat
- 2.Qe8#
- 1...Bxg4
- 2.Bxe3#
- 1...Bd5
- 2.Sd7#
- 1...Sd4
- 2.Bd6#
- 1...Bc6!
- threat
- 1.Qxe3+?
- 1...Be4
- 2.Bd6#
- 2.Re6#
- 2.Qf4#
- 2.Qxe4#
- 1...Sxe3!
- 1...Be4
- 1.Qd3?
- Keys
- 1.Bxe3!
- threat
- 2.Re6#
- 1...Bxg4
- 2.Qxb5#
- 1...Sxe3
- 2.Qxb2#
- 1...Bd5
- 2.Sd7#
- 1...Sd4
- 2.Bf4#
- threat
- 1.Bxe3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- B(b);SBLOCK::B(D)
- B(f);SBLOCK::S(E)
- S(c);OGATE::QAB(A),XB(b)
- S(c);SBLOCK::B(D)
- Tries
- Try
- Q(A);N_PINP(e)
- Threat
- DUALS(3)
- Vars
- B(b);::B(D)
- S(c);::B(D)
- Refutation
- S(a);XQ(A)
- Try
- Q(A);N_PINP(e),XB(f)
- Threat
- DUALS(5)
- Refutation
- S(a);XQ(A)
- Try
- Q(A);N_PINP(e)
- Threat
- DUALS(5)
- Refutation
- P(g);XQ(A)
- Try
- Q(A);N_PINP(e),XP(g)
- Threat
- QAR(A)
- Vars
- B(f);N_GUARD,XB(C)::QAR(A)+B(D),XP(e)
- B(f);SBLOCK::S(E)
- S(c);SBLOCK::QAR(A)+B(D),DCHECK
- Refutation
- B(f);
- Try
- Q(A);CHECK,XP(e)
- Refutation
- S(c);XQ(A)
- Try
- Actual
- B(D);XP(e)
- Threat
- R1(F)
- Vars
- B(f);N_GUARD,XB(C)::QAR(A),XP(g)
- S(c);OGATE,P_SPINS(c),XB(D)::QAB(A),XB(b)
- B(f);SBLOCK::S(E)
- S(c);SBLOCK::QAR(A)+B(D),DCHECK
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).