MESON Chess Problem Database
Problem Display
PID: 160583 (8/p7/Nb2R3/N2pn3/bQnkpB2/2p4K/2p1P3/2R4B w - - 0 1)
Antonov, Yuri Mikhailovich
Birnov MT, 1984
#2
9 + 10
| 15148 | Sadier Collection | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Bb3
- 2.Sxb3#
- 1...Bb5
- 2.Sb3#
- 1...Bc6
- 2.Sb3#
- 1...Bd7
- 2.Sb3#
- 1...Be8
- 2.Sb3#
- 1...Bxa5
- 2.Qc5#
- 1...Bc5
- 2.Qxc5#
- 1...Bc7
- 2.Qc5#
- 1...Bd8
- 2.Qc5#
- 1...Sd3
- 2.e3#
- 1...e3
- 2.Bxe5#
- 1...Bb3
- Tries
- 1.Sxc4?
- threat
- 2.Sxe5#
- 2.Be3#
- 2.Bxe5#
- 1...dxc4
- 2.Rd6#
- 2.Qd6#
- 1...Sf3
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sxb6#
- 2.Sd6#
- 2.Be3#
- 1...Bb3
- 2.Be3#
- 2.Bxe5#
- 1...Bb5
- 2.Be3#
- 2.Bxe5#
- 1...Ba5
- 2.Be3#
- 2.Bxe5#
- 2.Qc5#
- 1...Bc5
- 2.Be3#
- 2.Bxe5#
- 2.Qxc5#
- 1...Bc7
- 2.Sxe5#
- 2.Be3#
- 2.Qc5#
- 1...Sd3
- 2.Be3#
- 2.e3#
- 1...Sg4
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sxb6#
- 2.Sd6#
- 1...Sc6
- 2.Be3#
- 1...Sg6
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sxb6#
- 2.Sd6#
- 2.Be3#
- 1...Sd7
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sxb6#
- 2.Sd6#
- 2.Be3#
- 1...Sf7
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sxb6#
- 2.Sd6#
- 2.Be3#
- 1...e3
- 2.Sxe5#
- 2.Bxe3#
- 2.Bxe5#
- 1...Sxc4!
- threat
- 1.Bd2?
- threat
- 2.Qxc3#
- 1...Bxa5
- 2.Qc5#
- 1...cxd2!
- threat
- 1.Rxc2?
- threat
- 2.Qxc3#
- 1...Bxa5
- 2.Qc5#
- 1...Bxc2!
- threat
- 1.Rxe5?
- 1...Bxa5
- 2.Qc5#
- 1...Bb3
- 2.Sxb3#
- 2.Sc6#
- 1...Bb5
- 2.Sb3#
- 1...Bc6
- 2.Sb3#
- 2.Sxc6#
- 1...Be8
- 2.Sb3#
- 1...Bc5
- 2.Qxc5#
- 1...Bc7
- 2.Qc5#
- 1...Bd8
- 2.Qc5#
- 1...e3
- 2.Rxd5#
- 1...Bd7+!
- 1...Bxa5
- 1.Rd6?
- 1...Bxa5
- 2.Qc5#
- 1...Sf3
- 2.Qxc4#
- 1...Bb3
- 2.Sxb3#
- 1...Bb5
- 2.Sb3#
- 1...Bc6
- 2.Sb3#
- 1...Be8
- 2.Sb3#
- 1...Bc5
- 2.Qxc5#
- 1...Bc7
- 2.Qc5#
- 1...Bd8
- 2.Qc5#
- 1...Sd3
- 2.Qxc4#
- 2.e3#
- 1...Sg4
- 2.Qxc4#
- 1...Sc6
- 2.Qxc4#
- 1...Sg6
- 2.Qxc4#
- 1...Sd7
- 2.Qxc4#
- 1...Sf7
- 2.Qxc4#
- 1...e3
- 2.Rxd5#
- 1...Bd7+!
- 1...Bxa5
- 1.Qxc4+?
- 1...dxc4
- 2.Rd6#
- 1...Sxc4!
- 1...dxc4
- 1.Sxc4?
- Keys
- 1.Qb5!
- 1...Bxb5
- 2.Sb3#
- 1...Bxa5
- 2.Qc5#
- 1...Sxa5
- 2.e3#
- 1...Sf3
- 2.Sc6#
- 1...Bb3
- 2.Sxb3#
- 1...Bc5
- 2.Qxc5#
- 1...Bc7
- 2.Qc5#
- 1...Bd8
- 2.Qc5#
- 1...Sb2
- 2.e3#
- 1...Sd2
- 2.e3#
- 1...Sa3
- 2.e3#
- 1...Se3
- 2.Bxe5#
- 1...Sd6
- 2.e3#
- 1...Sd3
- 2.Sc6#
- 1...Sg4
- 2.Sc6#
- 1...Sc6
- 2.Sxc6#
- 1...Sg6
- 2.Sc6#
- 1...Sd7
- 2.Sc6#
- 1...Sf7
- 2.Sc6#
- 1...e3
- 2.Qxd5#
- 1...Bxb5
- 1.Qb5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 12
- REMOVED MATES = 3
- Sets
- B(c);N_GUARD::S(G),XB(c)
- B(c);N_GUARD::S(G)
- B(c);N_GUARD,P_PINR(I)::S(G)
- B(i);N_GUARD,XS(G)::QAB1(E)
- B(i);N_GUARD::QAB1(E),XB(i)
- B(i);N_GUARD::QAB1(E)
- S(h);SBLOCK::P(C)
- P(f);SBLOCK::B(F),XS(h)
- Tries
- Try
- S(G);XS(d)
- Threat
- DUALS(3)
- Vars
- S(h);::B(F)
- Refutation
- S(h);P_SPINS(h),XS(G)
- Try
- B(F);
- Threat
- QAB1(E),XP(b)
- Vars
- B(i);N_GUARD,XS(G)::QAB1(E)
- Refutation
- P(b);XB(F)
- Try
- R(A);XP(a)
- Threat
- QAB1(E),XP(b)
- Vars
- B(i);N_GUARD,XS(G)::QAB1(E)
- Refutation
- B(c);XR(A)
- Try
- R(I);XS(h)
- Vars
- B(i);N_GUARD,XS(G)::QAB1(E)
- B(c);N_GUARD::S(G)
- B(i);N_GUARD::QAB1(E),XB(i)
- B(i);N_GUARD::QAB1(E)
- P(f);::R1(I),XP(g)
- Refutation
- B(c);CHECK
- Try
- R(I);P_PINP(g)
- Vars
- B(i);N_GUARD,XS(G)::QAB1(E)
- S(h);N_GUARD::QAR1(E),XS(d)
- B(c);N_GUARD::S(G),XB(c)
- B(c);N_GUARD::S(G)
- B(i);N_GUARD::QAB1(E),XB(i)
- B(i);N_GUARD::QAB1(E)
- P(f);::R1(I),XP(g)
- Refutation
- B(c);CHECK
- Try
- Q(E);CHECK,XS(d)
- Vars
- P(g);S_CUTS(h),XQ(E)::R(I)
- Refutation
- S(h);XQ(E)
- Try
- Actual
- Q(E);N_PINS(d)
- Vars
- B(c);N_GUARD,XQ(E)::S(G)
- B(i);N_GUARD,XS(G)::QAB1(E)
- S(d);N_GUARD,XS(G)::P(C)
- S(h);N_GUARD::S(G)
- B(c);N_GUARD::S(G),XB(c)
- B(i);N_GUARD::QAB1(E),XB(i)
- B(i);N_GUARD::QAB1(E)
- S(d);N_GUARD::P(C)
- S(d);N_GUARD,SBLOCK::B(F),XS(h)
- S(h);N_GUARD::S(G),XS(h)
- P(f);::QAR1(E),XP(g)
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).