MESON Chess Problem Database
Problem Display
PID: 46517 (4n2K/3B1N1Q/2NP1kp1/2p2p2/6PP/2R3r1/b7/B1q1nrb1 w - - 0 1)
Bikov, Nikolai Aleksandrovich
Chernyavsky, Mykola Vasilovich
2nd HM., Probleemblad, 1972
#2
10 + 11
| 4393 | Uralski Problemist | 2002 |
SOLUTION
- SOUND
- Sets
- 1...Qe3
- 2.Rxe3#
- 1...Qg5
- 2.Re3#
- 2.hxg5#
- 1...Qh6
- 2.Re3#
- 1...Re3
- 2.g5#
- 1...Sxd6
- 2.Qg7#
- 1...Sc7
- 2.Qg7#
- 1...Sg7
- 2.Qxg7#
- 1...fxg4
- 2.Rf3#
- 1...Qe3
- Tries
- 1.Se7?
- threat
- 2.Sg8#
- 2.Qxg6#
- 1...Rxg4
- 2.Sg8#
- 1...Sxd6
- 2.Sg8#
- 1...Sg7
- 2.Qxg6#
- 2.Qxg7#
- 1...Qg5
- 2.Sg8#
- 2.Re3#
- 2.hxg5#
- 1...Qh6
- 2.Sg8#
- 2.Re3#
- 1...g5
- 2.Sg8#
- 2.Qg6#
- 1...Bxf7!
- threat
- 1.Sfe5?
- threat
- 2.Qxg6#
- 2.Qe7#
- 1...Rxg4
- 2.Qe7#
- 1...Qg5
- 2.Qe7#
- 1...Bf7
- 2.Qxf7#
- 1...Sg7
- 2.Qxg6#
- 2.Qxg7#
- 1...g5
- 2.Qg6#
- 2.Qh6#
- 2.Qe7#
- 1...Qh6!
- threat
- 1.Sg5?
- threat
- 2.Qe7#
- 1...Qe3
- 2.Rxe3#
- 1...Bf7
- 2.Qxf7#
- 1...Sg7
- 2.Qxg7#
- 1...Re3!
- threat
- 1.Sh6?
- threat
- 2.Qe7#
- 1...Qxh6
- 2.Re3#
- 1...Qe3
- 2.Rxe3#
- 1...Re3
- 2.g5#
- 1...Bf7
- 2.Qxf7#
- 1...Sg7
- 2.Qxg7#
- 1...g5!
- threat
- 1.Rxc1+?
- 1...Rc3
- 2.g5#
- 1...Bd4!
- 1...Rc3
- 1.Re3+?
- 1...Qb2
- 2.Bxb2#
- 1...Qc3
- 2.Bxc3#
- 1...Qxa1!
- 1...Qb2
- 1.Rxg3+?
- 1...Qb2
- 2.g5#
- 1...Qxa1
- 2.g5#
- 1...Qc3
- 2.g5#
- 1...Bd4!
- 1...Qb2
- 1.g5+?
- 1...Qxg5
- 2.Re3#
- 1...Rxg5!
- 1...Qxg5
- 1.Se7?
- Keys
- 1.Sfd8!
- threat
- 2.Qe7#
- 1...Qe3
- 2.Rxe3#
- 1...Qh6
- 2.Re3#
- 1...Re3
- 2.g5#
- 1...Bf7
- 2.Qxf7#
- 1...Sg7
- 2.Qxg7#
- 1...g5
- 2.Qh6#
- threat
- 1.Sfd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- Q(a);N_GUARD::B(A)+R(B),XQ(a)
- Q(a);N_GUARD,P_PINQ(I)::B(A)+R(B)
- R(f);N_GUARD,S_CUTQ(a)::P(C)
- S(k);N_GUARD,XP(F)::QAB1(I)
- S(k);N_GUARD::QAB1(I)
- S(k);N_GUARD::QAB1(I),XS(k)
- P(h);XP(C)::B(A)+R(B),DCHECK
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- R(f);XP(C)::S(E)
- S(k);XP(F)::S(E)
- Refutation
- B(e);XS(H)
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- R(f);XP(C)::QAB1(I)
- Q(a);::QAB1(I)
- B(e);N_GUARD::QAR1(I),XB(e)
- Refutation
- Q(a);P_PINQ(I)
- Try
- S(H);
- Threat
- QAB1(I)
- Vars
- Q(a);N_GUARD::B(A)+R(B),XQ(a)
- B(e);N_GUARD::QAR1(I),XB(e)
- S(k);N_GUARD::QAB1(I),XS(k)
- Refutation
- R(f);
- Try
- S(H);
- Threat
- QAB1(I)
- Vars
- Q(a);N_GUARD,P_PINQ(I),XS(H)::B(A)+R(B)
- Q(a);N_GUARD::B(A)+R(B),XQ(a)
- R(f);N_GUARD,S_CUTQ(a)::P(C)
- B(e);N_GUARD::QAR1(I),XB(e)
- S(k);N_GUARD::QAB1(I),XS(k)
- Refutation
- P(j);
- Try
- R(B);CHECK,XQ(a)
- Vars
- R(f);P_SPINR(f)::P(C)
- Refutation
- B(d);P_SPINB(d)
- Try
- R(B);CHECK
- Vars
- Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
- Refutation
- Q(a);XB(A)
- Try
- R(B);CHECK,XR(f)
- Vars
- Q(a);P_SPINQ(a)::P(C)
- Q(a);XB(A)::P(C)
- Refutation
- B(d);P_SPINB(d)
- Try
- P(C);CHECK
- Vars
- Q(a);XP(C)::B(A)+R(B)
- Refutation
- R(f);XP(C)
- Try
- Actual
- S(H);
- Threat
- QAB1(I)
- Vars
- Q(a);N_GUARD::B(A)+R(B),XQ(a)
- Q(a);N_GUARD,P_PINQ(I)::B(A)+R(B)
- R(f);N_GUARD,S_CUTQ(a)::P(C)
- B(e);N_GUARD::QAR1(I),XB(e)
- S(k);N_GUARD::QAB1(I),XS(k)
- P(j);OGATEB::QAR2(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).