MESON Chess Problem Database
Problem Display
PID: 198705 (1K2N3/pp3r2/r7/4k3/p1Q1bp1N/7B/3BpP2/4q3 w - - 0 1)
Ellerman, Arnoldo
L'Alfiere di Re, 1921
#2
7 + 10
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Bc3#
- 1...Qf1
- 2.Bc3#
- 1...Qg1
- 2.Bc3#
- 1...Qh1
- 2.Bc3#
- 1...Bb1
- 2.Sf3#
- 1...Bc2
- 2.Sf3#
- 1...Bd3
- 2.Sf3#
- 1...Bf3
- 2.Sxf3#
- 1...Bf5
- 2.Sf3#
- 2.Bxf4#
- 1...Bc6
- 2.Sg6#
- 1...Bg6
- 2.Sf3#
- 1...Bh7
- 2.Sf3#
- 1...Qb1
- Tries
- 1.Bf5?
- threat
- 2.Qxe4#
- 1...Bxf5
- 2.Sf3#
- 2.Bxf4#
- 1...Qb1
- 2.Bc3#
- 1...Qh1
- 2.Bc3#
- 1...Bb1
- 2.Bxf4#
- 2.Qc5#
- 1...Bh1
- 2.Bxf4#
- 1...Bc2
- 2.Bxf4#
- 2.Qc5#
- 1...Bg2
- 2.Bxf4#
- 1...Bd3
- 2.Bxf4#
- 2.Qc5#
- 1...Bf3
- 2.Bxf4#
- 1...Bd5
- 2.Bxf4#
- 2.Qc3#
- 2.Qxf4#
- 1...Bc6
- 2.Bxf4#
- 1...Rxf5!
- threat
- 1.Bf5?
- Keys
- 1.f3!
- threat
- 2.Qxe4#
- 1...Bxf3
- 2.Sxf3#
- 1...Bd5
- 2.Qc3#
- 1...Qb1
- 2.Bc3#
- 1...Bb1
- 2.Qc5#
- 1...Bc2
- 2.Qc5#
- 1...Bd3
- 2.Qc5#
- 1...Bf5
- 2.Bxf4#
- 1...Bc6
- 2.Sg6#
- 1...Bg6
- 2.Qc5#
- 1...Bh7
- 2.Qc5#
- threat
- 1.f3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- Q(a);N_GUARD::B(A)
- B(d);N_GUARD::S(E)
- B(d);N_GUARD::S(E),XB(d)
- B(d);N_GUARD,S_CUTR(g)::S(E)
- Tries
- Try
- B(C);
- Threat
- QAR1(D),XB(d)
- Vars
- Q(a);N_GUARD::B(A)
- B(d);::B(A),XP(e)
- Refutation
- R(j);XB(C)
- Try
- Actual
- P(B);
- Threat
- QAR1(D),XB(d)
- Vars
- B(d);XP(B)::S(E),XB(d)
- B(d);SBLOCK::QAB(D)
- Q(a);N_GUARD::B(A)
- B(d);N_GUARD::QAR2(D)
- B(d);S_CUTR(j)::B(A),XP(e)
- B(d);N_GUARD,S_CUTR(g)::S(E)
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).