MESON Chess Problem Database
Problem Display
PID: 214812 (4r3/8/1NNnpp1R/p4PRp/Qn3k1P/1K2pp1P/1B3p2/1B6 w - - 0 1)
Doukhan, Gerard
Best Problems, 2020
#2
11 + 11
SOLUTION
- SOUND
- Sets
- 1...e2
- 2.Bc1#
- 1...exf5
- 2.Sd5#
- 1...e5
- 2.Sd5#
- 1...fxg5
- 2.Be5#
- 1...e2
- Tries
- 1.Rhxh5?
- threat
- 2.Rg4#
- 1...exf5
- 2.Sd5#
- 1...fxg5
- 2.Be5#
- 1...e2
- 2.Bc1#
- 1...Rg8!
- threat
- 1.Qxb4+?
- 1...Sc4
- 2.Qxc4#
- 1...Se4
- 2.Qxe4#
- 1...axb4!
- 1...Sc4
- 1.fxe6?
- threat
- 2.Sd5#
- 1...fxg5
- 2.Be5#
- 1...Sc4
- 2.Rxf6#
- 1...Se4!
- threat
- 1.Rhxh5?
- Keys
- 1.Rxf6!
- threat
- 2.Be5#
- 1...exf5
- 2.Sd5#
- 1...e2
- 2.Bc1#
- 1...Sc4
- 2.fxe6#
- 1...Sf7
- 2.fxe6#
- 1...e5
- 2.Sd5#
- threat
- 1.Rxf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- P(b);OGATEB::B(B)
- P(i);N_GUARD,XP(G)::S(I)
- P(i);N_GUARD::S(I)
- P(j);N_GUARD,XR(H)::B(B)
- Tries
- Try
- R(K);XP(g)
- Threat
- R1(H)
- Vars
- P(i);N_GUARD,XP(G)::S(I)
- P(j);N_GUARD,XR(H)::B(B)
- P(b);OGATEB::B(B)
- Refutation
- R(k);
- Try
- Q(E);CHECK,XS(d)
- Vars
- S(h);N_GUARD,P_SPINS(h)::QAR(E),XS(h)
- S(h);N_GUARD,P_SPINS(h)::QAR1(E),XS(h)
- Refutation
- P(f);XQ(E)
- Try
- P(G);XP(i)
- Threat
- S(I)
- Vars
- P(j);N_GUARD,XR(H)::B(B)
- S(h);N_GUARD,N_SPINS(d)::R(K),XP(j)
- Refutation
- S(h);N_SPINS(d)
- Try
- Actual
- R(K);XP(j)
- Threat
- B(B)
- Vars
- P(i);N_GUARD,P_SPINP(i),XP(G)::S(I)
- P(b);OGATEB::B(B)
- S(h);N_GUARD,N_SPINS(d)::R(K)+P(G),XP(i)
- S(h);N_GUARD::R(K)+P(G),XP(i)
- P(i);N_GUARD::S(I)
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).