MESON Chess Problem Database
Problem Display
PID: 85283 (2N5/2p1B3/1QB3R1/R3rk1P/8/3N4/6P1/b1qbn2K w - - 0 1)
Ivunin, Alexey Vsevolodovich
Na Smenu!, 1968
#2
10 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bc2
- 2.g4#
- 1...Bb3
- 2.g4#
- 1...Ba4
- 2.g4#
- 1...Sf3
- 2.g4#
- 1...cxb6
- 2.Sd6#
- 1...Bc2
- Tries
- 1.Bb7?
- threat
- 2.Qe6#
- 2.Qf6#
- 1...Rxa5
- 2.Qe6#
- 1...Sxd3
- 2.Qf6#
- 1...cxb6
- 2.Sd6#
- 1...Qg5
- 2.Rxg5#
- 2.Qe6#
- 1...Rd5
- 2.Qe6#
- 1...c6
- 2.Sd6#
- 1...Qc4
- 2.Rg5#
- 2.Qf6#
- 1...Qc5
- 2.Rg5#
- 2.Qf6#
- 1...Rb5
- 2.Qe6#
- 1...Rc5
- 2.Qe6#
- 1...Bb3
- 2.Qf6#
- 2.g4#
- 1...c5
- 2.Sd6#
- 2.Qf6#
- 1...Qc6!
- threat
- 1.Ba8?
- threat
- 2.Qe6#
- 2.Qf6#
- 1...Rxa5
- 2.Qe6#
- 1...Sxd3
- 2.Qf6#
- 1...cxb6
- 2.Sd6#
- 1...Qg5
- 2.Rxg5#
- 2.Qe6#
- 1...Rd5
- 2.Qe6#
- 1...c6
- 2.Sd6#
- 1...Qc4
- 2.Rg5#
- 2.Qf6#
- 1...Qc5
- 2.Rg5#
- 2.Qf6#
- 1...Rb5
- 2.Qe6#
- 1...Rc5
- 2.Qe6#
- 1...Bb3
- 2.Qf6#
- 2.g4#
- 1...c5
- 2.Sd6#
- 2.Qf6#
- 1...Qc6!
- threat
- 1.Qf2+?
- 1...Qf4
- 2.Qxf4#
- 1...Sf3
- 2.g4#
- 1...Bf3!
- 1...Qf4
- 1.Qe3?
- threat
- 2.Be4#
- 2.Bd7#
- 2.Qe4#
- 1...Qxc6
- 2.Qf4#
- 1...Bxh5
- 2.Be4#
- 2.Qe4#
- 1...Qc4
- 2.Qg5#
- 1...Qc5
- 2.Qf4#
- 2.Qg5#
- 1...Rd5
- 2.Bd7#
- 2.Rg5#
- 2.Qe6#
- 1...Bb3
- 2.Be4#
- 2.Qh3#
- 2.Qe4#
- 2.g4#
- 1...Bf3
- 2.Bd7#
- 1...Ba4
- 2.Be4#
- 2.Qh3#
- 2.Qe4#
- 2.g4#
- 1...Qxe3!
- threat
- 1.Qd4?
- threat
- 2.Be4#
- 2.Bd7#
- 2.Rxe5#
- 2.Qe4#
- 2.Qd7#
- 1...Qxc6
- 2.Rxe5#
- 2.Qf4#
- 1...Rxa5
- 2.Be4#
- 2.Bd7#
- 2.Qe4#
- 2.Qd7#
- 1...Bxh5
- 2.Be4#
- 2.Qe4#
- 1...Sxd3
- 2.Bd7#
- 2.Qe4#
- 1...Qe3
- 2.Bd7#
- 2.Qd7#
- 1...Qf4
- 2.Bd7#
- 2.Qxf4#
- 2.Qd7#
- 1...Qg5
- 2.Bd7#
- 2.Rxe5#
- 2.Qe4#
- 2.Qd7#
- 1...Qc4
- 2.Be4#
- 2.Rxe5#
- 1...Qc5
- 2.Qf4#
- 1...Rb5
- 2.Be4#
- 2.Bd7#
- 2.Qe4#
- 2.Qd7#
- 1...Rc5
- 2.Be4#
- 2.Bd7#
- 2.Qe4#
- 2.Qd7#
- 1...Rd5
- 2.Bd7#
- 2.Rxd5#
- 1...Bb3
- 2.Be4#
- 2.Rxe5#
- 2.Qe4#
- 2.Qg4#
- 2.g4#
- 1...Bf3
- 2.Bd7#
- 2.Rxe5#
- 2.Qd7#
- 1...Ba4
- 2.Be4#
- 2.Rxe5#
- 2.Qe4#
- 2.Qg4#
- 2.Qd7#
- 2.g4#
- 1...Sf3
- 2.Be4#
- 2.Bd7#
- 2.Qe4#
- 2.Qg4#
- 2.Qd7#
- 2.g4#
- 1...Bxd4!
- threat
- 1.Bb7?
- Keys
- 1.Bd5!
- threat
- 2.Qf6#
- 1...Rxd5
- 2.Qe6#
- 1...Rxe7
- 2.Sxe7#
- 1...cxb6
- 2.Sd6#
- 1...Qg5
- 2.Rxg5#
- 1...Qc6
- 2.Rg5#
- 1...Re2
- 2.g4#
- 1...Re3
- 2.Rg5#
- 1...Re4
- 2.Be6#
- 1...Re6
- 2.Qxe6#
- 1...c6
- 2.Sd6#
- threat
- 1.Bd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 4
- Sets
- B(c);N_GUARD::P(B)
- S(d);S_CUTB(c)::P(B)
- P(g);N_GUARD,XQ(F)::S(J)
- Tries
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- R(e);N_SPINR(e),XR(D)::QAB1(F)
- S(d);XS(C)::QAR1(F)
- P(g);N_GUARD,XQ(F)::S(J)
- R(e);::QAB1(F)
- P(g);N_GUARD::S(J)
- Refutation
- Q(b);P_PINP(B)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- R(e);N_SPINR(e),XR(D)::QAB1(F)
- S(d);XS(C)::QAR1(F)
- P(g);N_GUARD,XQ(F)::S(J)
- R(e);::QAB1(F)
- P(g);N_GUARD::S(J)
- Refutation
- Q(b);P_PINP(B)
- Try
- Q(F);CHECK
- Vars
- Q(b);N_GUARD,P_SPINQ(b)::QAR1(F),XQ(b)
- S(d);P_SPINS(d)::P(B)
- Refutation
- B(c);P_PINP(B),P_SPINB(c)
- Try
- Q(F);
- Threat
- DUALS(3)
- Vars
- Q(b);N_GUARD,P_PINP(B),XB(G)::QAR1(F)
- Q(b);N_GUARD::QAR1(F)
- B(c);P_PINP(B)::B(G)
- Refutation
- Q(b);XQ(F)
- Try
- Q(F);
- Threat
- DUALS(5)
- Vars
- Q(b);N_GUARD,N_SPINR(e)::QAR1(F)
- Refutation
- B(a);XQ(F)
- Try
- Actual
- B(G);N_PINR(e)
- Threat
- QAR1(F)
- Vars
- R(e);N_GUARD,P_SPINR(e),XB(G)::QAB1(F)
- R(e);XB(I)::S(J),XR(e)
- P(g);N_GUARD,XQ(F)::S(J)
- Q(b);N_GUARD::R1(H),XQ(b)
- Q(b);N_GUARD::R1(H)
- R(e);S_CUTB(c)::P(B)
- R(e);S_CUTQ(b)::R1(H)
- R(e);SBLOCK::R(D)+B(G),DCHECK
- R(e);N_GUARD::QAB1(F),XR(e)
- P(g);N_GUARD::S(J)
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).