MESON Chess Problem Database
Problem Display
PID: 206752 (6b1/5pn1/2p4r/4R1p1/3B1k2/1Q1P2np/K6N/6N1 w - - 0 1)
Isaev, Leonid Antonovich
64 Shakhmatnoe obozrenie, 1925
#2
7 + 9
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rd6
- 2.Sxh3#
- 1...Re6
- 2.Sxh3#
- 1...Rf6
- 2.Sxh3#
- 1...Rg6
- 2.Sxh3#
- 1...Sf1
- 2.Se2#
- 1...Sh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...S3f5
- 2.Se2#
- 1...S3h5
- 2.Se2#
- 1...S7h5
- 2.Sxh3#
- 1...Rd6
- Tries
- 1.Qd5?
- threat
- 2.Be3#
- 2.Qf3#
- 1...Sf1
- 2.Se2#
- 2.Qf3#
- 1...Sh1
- 2.Se2#
- 2.Qf3#
- 1...Se2
- 2.Sxe2#
- 2.Qf3#
- 1...Se4
- 2.Se2#
- 1...S3f5
- 2.Se2#
- 2.Qf3#
- 1...S3h5
- 2.Se2#
- 2.Qf3#
- 1...S7f5
- 2.Qf3#
- 1...g4
- 2.Be3#
- 1...f5
- 2.Be3#
- 1...f6
- 2.Be3#
- 1...cxd5!
- threat
- 1.Qd5?
- Keys
- 1.Qb8!
- threat
- 2.Be3#
- 1...f5+
- 2.Re6#
- 1...f6+
- 2.Rd5#
- 1...Sf1
- 2.Se2#
- 1...Sh1
- 2.Se2#
- 1...Se2
- 2.Sxe2#
- 1...Se4
- 2.Se2#
- 1...S3f5
- 2.Se2#
- 2.Re4#
- 1...S3h5
- 2.Se2#
- 1...Rd6
- 2.Sxh3#
- 1...S7f5
- 2.Re4#
- threat
- 1.Qb8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- R(f);N_GUARD::S(A),XP(b)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(h);S_CUTR(f)::S(A),XP(b)
- Tries
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD::S(A)
- S(h);::QAR1(D)
- P(d);::B(F)
- P(g);P_PINQ(D)::B(F)
- Refutation
- P(e);XQ(D)
- Try
- Actual
- Q(D);
- Threat
- B(F)
- Vars
- P(g);CHECK,SBLOCK::QAB(D)+R(G)
- P(g);CHECK,S_CUTR(f)::QAB(D)+R(G)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- R(f);N_GUARD::S(A),XP(b)
- S(h);SBLOCK::QAB(D)+R(G),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).