MESON Chess Problem Database
Problem Display
PID: 256981 (3N3n/1pR5/5kp1/1P2pn2/2Kp3P/8/2Q5/5R2 w - - 0 1)
Shtern, David
Variantim, 2021
#2
7 + 7
SOLUTION
- SOUND
- Sets
- 1...Sf7
- 2.Rxf7#
- 1...g5
- 2.Qxf5#
- 1...Sf7
- Tries
- 1.Qd3?
- 1...Sf7
- 2.Rxf7#
- 1...e4
- 2.Qxd4#
- 1...g5
- 2.Qxf5#
- 1...b6!
- 1...Sf7
- 1.Qe4?
- 1...Sf7
- 2.Rxf7#
- 1...g5
- 2.Qxf5#
- 1...b6
- 2.Qc6#
- 1...d3!
- 1...Sf7
- 1.Qc1?
- threat
- 2.Qg5#
- 1...Sf7
- 2.Rxf7#
- 1...g5
- 2.Qxg5#
- 1...e4!
- threat
- 1.Qf2?
- 1...Sf7
- 2.Rxf7#
- 1...e4
- 2.Qxd4#
- 1...g5
- 2.Qxf5#
- 1...d3
- 2.Qb6#
- 1...b6!
- 1...Sf7
- 1.Qg2?
- threat
- 2.Qg5#
- 1...Sf7
- 2.Rxf7#
- 1...g5
- 2.Qxg5#
- 1...e4!
- threat
- 1.Qd3?
- Keys
- 1.Qd2!
- threat
- 2.Qg5#
- 1...Sf7
- 2.Rxf7#
- 1...e4
- 2.Qxd4#
- 1...g5
- 2.Qxg5#
- threat
- 1.Qd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(g);N_GUARD::R1(F),XS(g)
- P(e);N_GUARD::QAR1(B),XS(c)
- Tries
- Try
- Q(B);
- Vars
- S(g);N_GUARD::R1(F),XS(g)
- P(b);OGATEB::QAB(B),XP(a)
- P(e);N_GUARD::QAR1(B),XS(c)
- Refutation
- P(f);
- Try
- Q(B);
- Vars
- S(g);N_GUARD::R1(F),XS(g)
- P(e);N_GUARD::QAR1(B),XS(c)
- P(f);N_GUARD::QAR(B)
- Refutation
- P(a);
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- S(g);N_GUARD::R1(F),XS(g)
- P(e);::QAB1(B),XP(e)
- Refutation
- P(b);
- Try
- Q(B);
- Vars
- S(g);N_GUARD::R1(F),XS(g)
- P(b);OGATEB::QAB(B),XP(a)
- P(e);N_GUARD::QAR1(B),XS(c)
- P(a);OGATE::QAR(B)
- Refutation
- P(f);
- Try
- Q(B);
- Threat
- QAB1(B)
- Vars
- S(g);N_GUARD::R1(F),XS(g)
- P(e);::QAB1(B),XP(e)
- Refutation
- P(b);
- Try
- Actual
- Q(B);
- Threat
- QAB1(B)
- Vars
- S(g);N_GUARD::R1(F),XS(g)
- P(b);OGATEB::QAB(B),XP(a)
- P(e);::QAB1(B),XP(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).