MESON Chess Problem Database
Problem Display
PID: 250089 (8/4NK1p/5p2/4PQpr/1P1k2q1/2p1r1N1/2P4n/5BB1 w - - 0 1)
Isaev, Leonid Antonovich
Tijdschrift vd KNSB, 1927
#2
9 + 9
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Qe4#
- 1...Qe2
- 2.Qe4#
- 1...Qh3
- 2.Qe4#
- 1...Qe4
- 2.Qxe4#
- 1...fxe5
- 2.Qd3#
- 1...Qd1
- Tries
- 1.exf6?
- threat
- 2.Sc6#
- 2.Qc5#
- 2.Qd5#
- 1...Qxg3
- 2.Sc6#
- 2.Qd5#
- 1...Sxf1
- 2.Qc5#
- 2.Qd5#
- 1...Qe2
- 2.Qe4#
- 2.Qc5#
- 2.Qd5#
- 1...Qf3
- 2.Qc5#
- 1...Qe4
- 2.Qxe4#
- 2.Qc5#
- 1...Qxf5!
- threat
- 1.e6?
- threat
- 2.Sc6#
- 2.Qc5#
- 2.Qd5#
- 2.Qxf6#
- 1...Qxg3
- 2.Sc6#
- 2.Qd5#
- 1...Sxf1
- 2.Qc5#
- 2.Qd5#
- 1...Qe2
- 2.Qe4#
- 2.Qc5#
- 2.Qd5#
- 1...Qf3
- 2.Qc5#
- 1...Qe4
- 2.Qxe4#
- 2.Qc5#
- 1...Qf4
- 2.Sc6#
- 2.Qc5#
- 2.Qd5#
- 1...Rh6
- 2.Sc6#
- 2.Qc5#
- 2.Qd5#
- 1...Sf3
- 2.Sc6#
- 2.Qc5#
- 2.Qd5#
- 1...Qxf5!
- threat
- 1.exf6?
- Keys
- 1.Ke6!
- threat
- 2.Sc6#
- 1...Qxf5+
- 2.Sexf5#
- 1...Sxf1
- 2.Qxg4#
- 1...Qe2
- 2.Qe4#
- 1...Qf3
- 2.Qd3#
- 1...Qe4
- 2.Qxe4#
- threat
- 1.Ke6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- Q(e);N_GUARD::QAR1(G)
- Q(e);N_GUARD::QAR1(G),XQ(e)
- P(h);SBLOCK,XP(F)::QAR1(G)
- Tries
- Try
- P(F);XP(h)
- Threat
- DUALS(3)
- Vars
- Q(e);::QAB1(G)
- Refutation
- Q(e);P_PINP(F),XQ(G)
- Try
- P(F);
- Threat
- DUALS(4)
- Vars
- Q(e);::QAB1(G)
- Refutation
- Q(e);XQ(G)
- Try
- Actual
- K(I);P_SPINP(F),P_SPINQ(G),S_FLIGHT
- Threat
- S(H)
- Vars
- Q(e);CHECK,XQ(G)::S(H),XQ(e)
- S(a);N_GUARD,XB(A)::QAR(G),XQ(e)
- Q(e);N_PINQ(G)::QAR1(G)
- Q(e);N_PINQ(G)::QAR1(G),XQ(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).