MESON Chess Problem Database
Problem Display
PID: 157948 (8/4p3/p3B3/K7/P3n3/RNpkpR1N/P1r1n3/BQ6 w - - 0 1)
Antonov, Yuri Mikhailovich
Shakhmaty v SSSR, 1973
#2
10 + 8
| 15148 | Sadier Collection | 2016 |
| 5454 | Near Snap | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Sf4#
- 1...Sg1
- 2.Sf4#
- 1...S2g3
- 2.Sf4#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sd2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...S4g3
- 2.Sf2#
- 1...Sc5
- 2.Sf2#
- 1...Sg5
- 2.Sf2#
- 1...Sd6
- 2.Sf2#
- 1...Sf6
- 2.Sf2#
- 1...Sc1
- Tries
- 1.Kb4?
- threat
- 2.Bc4#
- 1...Sd2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...S4g3
- 2.Sf2#
- 1...Sc5
- 2.Sf2#
- 1...Sg5
- 2.Sf2#
- 1...Sd6
- 2.Sf2#
- 1...Sf6
- 2.Sf2#
- 1...a5+!
- threat
- 1.Kxa6?
- 1...Sc1
- 2.Sf4#
- 1...Sg1
- 2.Sf4#
- 1...S2g3
- 2.Sf4#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sd2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...S4g3
- 2.Sf2#
- 1...Sg5
- 2.Sf2#
- 1...Sd6
- 2.Sf2#
- 1...Sf6
- 2.Sf2#
- 1...Sc5+!
- 1...Sc1
- 1.Kb6?
- 1...Sc1
- 2.Sf4#
- 1...Sg1
- 2.Sf4#
- 1...S2g3
- 2.Sf4#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sd2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...S4g3
- 2.Sf2#
- 1...Sc5
- 2.Sf2#
- 1...Sg5
- 2.Sf2#
- 1...Sd6
- 2.Sf2#
- 1...Sf6
- 2.Sf2#
- 1...a5!
- 1...Sc1
- 1.Bb2?
- 1...Sc1
- 2.Sf4#
- 1...Sg1
- 2.Sf4#
- 1...S2g3
- 2.Sf4#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sd2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...S4g3
- 2.Sf2#
- 1...Sc5
- 2.Sf2#
- 1...Sg5
- 2.Sf2#
- 1...Sd6
- 2.Sf2#
- 1...Sf6
- 2.Sf2#
- 1...cxb2!
- 1...Sc1
- 1.Rg3?
- 1...S2xg3
- 2.Sf4#
- 1...Sc1
- 2.Sf4#
- 1...Sg1
- 2.Sf4#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sd2
- 2.Sf2#
- 1...Sf2
- 2.Sxf2#
- 1...Sc5
- 2.Sf2#
- 1...Sg5
- 2.Sf2#
- 1...Sd6
- 2.Sf2#
- 1...Sf6
- 2.Sf2#
- 1...S4xg3!
- 1...S2xg3
- 1.Qd1+?
- 1...Sd2
- 2.Sf2#
- 1...Rd2!
- 1...Sd2
- 1.Kb4?
- Keys
- 1.Bxc3!
- 1...Kxc3
- 2.Rxe3#
- 1...S2xc3
- 2.Sf4#
- 1...S4xc3
- 2.Sf2#
- 1...Sc1
- 2.Sxc1#
- 1...Sg1
- 2.Sc1#
- 1...S2g3
- 2.Sc1#
- 1...Sd4
- 2.Sc1#
- 1...Sf4
- 2.Sc1#
- 1...Sd2
- 2.Sc5#
- 1...Sf2
- 2.Sc5#
- 1...S4g3
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...Sg5
- 2.Sc5#
- 1...Sd6
- 2.Sc5#
- 1...Sf6
- 2.Sc5#
- 1...Kxc3
- 1.Bxc3!
Anticipated by 18687(1957), 155625(1963)
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 12
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- S(b);N_GUARD::S(G)
- S(b);N_GUARD::S(G),XS(b)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- Tries
- Try
- K(I);S_FLIGHT
- Threat
- B(J)
- Vars
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- Refutation
- P(g);CHECK
- Try
- K(I);P-FLIGHT,XP(g)
- Vars
- S(b);N_GUARD::S(G)
- S(b);N_GUARD::S(G),XS(b)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- Refutation
- S(f);CHECK
- Try
- K(I);S_FLIGHT
- Vars
- S(b);N_GUARD::S(G)
- S(b);N_GUARD::S(G),XS(b)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- Refutation
- P(g);
- Try
- B(A);
- Vars
- S(b);N_GUARD::S(G)
- S(b);N_GUARD::S(G),XS(b)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- Refutation
- P(c);XB(A)
- Try
- R(F);
- Vars
- S(b);N_GUARD,N_SPINP(e),XR(F)::S(G)
- S(b);N_GUARD::S(G)
- S(b);N_GUARD::S(G),XS(b)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- Refutation
- S(f);N_SPINP(e),XR(F)
- Try
- Q(B);CHECK,N_PINR(a)
- Vars
- S(f);P_SPINS(f)::S(G)
- Refutation
- R(a);P_SPINR(a)
- Try
- Actual
- B(A);XP(c)
- Vars
- K(d);N_SPINR(a),P-FLIGHT,XB(A)::R(F),XP(e)
- S(b);N_GUARD,SBLOCK,XB(A)::S(G)
- S(f);N_GUARD,SBLOCK,XB(A)::S(G)
- S(b);N_GUARD::S(E),XS(b)
- S(b);N_GUARD::S(E)
- S(f);N_GUARD::S(E)
- S(f);N_GUARD::S(E),XS(f)
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).