MESON Chess Problem Database
Problem Display
PID: 140341 (2NQR2r/K1Bn2P1/2R1N2q/5kpB/3p1p2/5P2/8/b3r3 w - - 0 1)
Belyakin, Yuri Maksimovich
3rd HM., Shakhmaty v SSSR, 1949
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxg7
- 2.Sxg7#
- 1...Qg6
- 2.Bg4#
- 1...Qh7
- 2.Qxg5#
- 1...Re5
- 2.Sd6#
- 1...Se5
- 2.Sd6#
- 1...Sf6
- 2.Se7#
- 1...Qxg7
- Tries
- 1.Rc5+?
- 1...Re5
- 2.Sd6#
- 1...Se5
- 2.Sd6#
- 1...Sxc5!
- 1...Re5
- 1.gxh8S?
- threat
- 2.Bg4#
- 1...Qxh5
- 2.Sg7#
- 1...Qxh8
- 2.Qxg5#
- 1...Se5
- 2.Sd6#
- 1...Sf6
- 2.Se7#
- 1...g4
- 2.Bxg4#
- 1...Rg1!
- threat
- 1.Rc5+?
- Keys
- 1.Sf8!
- threat
- 2.Bg4#
- 1...Qxh5
- 2.Sd6#
- 1...Rg1
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sf6
- 2.Sd6#
- 1...g4
- 2.Bxg4#
- 2.fxg4#
- threat
- 1.Sf8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- Q(g);XP(G)::S(D),XQ(g)
- Q(g);SBLOCK::B(B)
- Q(g);N_GUARD::QAR1(I),XP(f)
- R(b);SBLOCK::S(H)
- S(h);SBLOCK::S(H)
- Tries
- Try
- R(C);CHECK
- Vars
- R(b);P_SPINR(b)::S(H)
- S(h);P_SPINS(h)::S(H)
- Refutation
- S(h);XR(C)
- Try
- P(G);XR(i)
- Threat
- B(B)
- Vars
- Q(g);N_GUARD,XB(B)::S(D)
- Q(g);N_GUARD,XS(G)::QAR1(I),XP(f)
- S(h);SBLOCK::S(H)
- P(f);::B(B),XP(f)
- Refutation
- R(b);
- Try
- Actual
- S(D);
- Threat
- B(B)
- Vars
- Q(g);N_GUARD,XB(B)::S(H)
- R(b);N_GUARD::S(H)
- S(h);S_CUTR(b)::S(H)
- S(h);S_CUTQ(g)::S(H)
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).