MESON Chess Problem Database
Problem Display
PID: 180390 (8/5P2/1r6/r4N1p/3Ppk2/7Q/6RK/1B6 w - - 0 1)
Lider, Valentin Viktorovich
Die Schwalbe, 1975
#2
7 + 5
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rxf5
- 2.Qg3#
- 1...e3
- 2.Qxe3#
- 2.Qg3#
- 1...h4
- 2.Qg4#
- 1...Rxf5
- Tries
- 1.Se3?
- threat
- 2.Qg3#
- 1...Rg5
- 2.Rf2#
- 1...h4
- 2.Rg4#
- 1...Rg6!
- threat
- 1.Sh4?
- threat
- 2.Qg3#
- 1...Rg5
- 2.Rf2#
- 1...Rb3
- 2.Sg6#
- 1...Rg6
- 2.Sxg6#
- 1...Ra3!
- threat
- 1.Sg7?
- threat
- 2.Qg3#
- 1...Ra3
- 2.Sxh5#
- 1...Rg5
- 2.Rf2#
- 1...Rb3
- 2.Se6#
- 1...h4
- 2.Rg4#
- 1...Rg6!
- threat
- 1.Bxe4?
- threat
- 2.Qe3#
- 2.Qf3#
- 2.Qh4#
- 1...Rxf5
- 2.Qf3#
- 1...Ra3
- 2.Qh4#
- 1...Rb3
- 2.Qh4#
- 1...Rg6
- 2.Qe3#
- 2.Qf3#
- 1...h4
- 2.Rg4#
- 2.Qg4#
- 2.Qe3#
- 2.Qf3#
- 2.Qxh4#
- 1...Kxe4!
- threat
- 1.Qh4+?
- 1...Kf3
- 2.Bxe4#
- 2.Rf2#
- 2.Qf2#
- 2.Qg3#
- 2.Qxe4#
- 1...Kxf5!
- 1...Kf3
- 1.Qxh5?
- threat
- 2.Rf2#
- 2.Qg4#
- 1...Ra2
- 2.Qg4#
- 1...Ra3
- 2.Qg4#
- 1...Rb2
- 2.Qg4#
- 1...Rb3
- 2.Qg4#
- 1...Rg6
- 2.Rf2#
- 1...Rh6
- 2.Rf2#
- 1...e3
- 2.Qg4#
- 1...Rxf5!
- threat
- 1.f8Q?
- threat
- 2.Qe3#
- 2.Qg3#
- 1...Rxf5
- 2.Qg3#
- 2.Qfxf5#
- 1...Ra3
- 2.Sd6#
- 1...Rb3
- 2.Qh6#
- 1...Rg6
- 2.Qe3#
- 1...e3
- 2.Qxe3#
- 2.Qg3#
- 1...h4
- 2.Rg4#
- 2.Qg4#
- 2.Qe3#
- 1...Rf6!
- threat
- 1.Se3?
- Keys
- 1.Se7!
- threat
- 2.Qg3#
- 1...Ra3
- 2.Sd5#
- 1...Rg5
- 2.Rf2#
- 1...Rb3
- 2.Sg6#
- 1...Rg6
- 2.Sxg6#
- 1...h4
- 2.Rg4#
- threat
- 1.Se7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- R(c);SBLOCK,XS(F)::QAB1(D)
- P(d);N_GUARD::QAR1(D)
- Tries
- Try
- S(F);
- Threat
- QAB1(D)
- Vars
- R(c);SBLOCK::R(B)
- P(d);N_GUARD::R1(B)
- Refutation
- R(e);
- Try
- S(F);
- Threat
- QAB1(D)
- Vars
- R(c);SBLOCK::R(B)
- R(e);N_GUARD::S(F)
- R(e);N_GUARD::S(F),XR(e)
- Refutation
- R(c);
- Try
- S(F);
- Threat
- QAB1(D)
- Vars
- R(c);N_GUARD::S(F),XP(d)
- R(c);SBLOCK::R(B)
- R(e);N_GUARD::S(F)
- P(d);N_GUARD::R1(B)
- Refutation
- R(e);
- Try
- B(A);XP(a)
- Threat
- DUALS(3)
- Vars
- R(c);XS(F)::QAR1(D)
- R(c);::QAR2(D)
- R(e);::QAR2(D)
- Refutation
- K(b);P-FLIGHT,XB(A)
- Try
- Q(D);CHECK
- Refutation
- K(b);P-FLIGHT,P_SPINP(a),XS(F)
- Try
- Q(D);XP(d)
- Threat
- DUALS(2)
- Vars
- R(c);P_PINR(B)::QAR1(D)
- R(c);::QAR1(D)
- R(e);P_PINR(B)::QAR1(D)
- R(e);::QAR1(D)
- R(e);::R(B)
- R(e);P_PINQ(D)::R(B)
- P(a);::QAR1(D)
- Refutation
- R(c);XS(F)
- Try
- P(G);
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD::QAR(G)+S(F)
- R(e);N_GUARD::QAB(G)
- R(e);::QAB1(D)
- Refutation
- R(e);
- Try
- Actual
- S(F);
- Threat
- QAB1(D)
- Vars
- R(c);N_GUARD::S(F)
- R(c);SBLOCK::R(B)
- R(e);N_GUARD::S(F)
- R(e);N_GUARD::S(F),XR(e)
- P(d);N_GUARD::R1(B)
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).