MESON Chess Problem Database
Problem Display
PID: 101050 (8/4B3/2p1n3/R1pkNB2/3b1P2/1r6/N6P/3R3K w - - 0 1)
Kovacs, Norbert
Good Companions, 1924
#2
9 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Sc3#
- 1...Rb2
- 2.Sc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sxc3#
- 2.Sb4#
- 1...Rd3
- 2.Sb4#
- 1...Re3
- 2.Sb4#
- 1...Rf3
- 2.Sb4#
- 1...Rg3
- 2.Sb4#
- 1...Rh3
- 2.Sb4#
- 1...Rb4
- 2.Sc3#
- 2.Sxb4#
- 1...Rb5
- 2.Sc3#
- 1...Rb6
- 2.Sc3#
- 1...Rb7
- 2.Sc3#
- 1...Rb8
- 2.Sc3#
- 1...Sxf4
- 2.Rxc5#
- 1...Sg5
- 2.Rxc5#
- 1...Sc7
- 2.Rxc5#
- 1...Sg7
- 2.Rxc5#
- 1...Sd8
- 2.Rxc5#
- 1...Sf8
- 2.Rxc5#
- 1...Rb1
- Tries
- 1.Bf8?
- 1...Sxf4
- 2.Rxc5#
- 1...Rb1
- 2.Sc3#
- 1...Rb2
- 2.Sc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sxc3#
- 2.Sb4#
- 1...Rd3
- 2.Sb4#
- 1...Re3
- 2.Sb4#
- 1...Rf3
- 2.Sb4#
- 1...Rg3
- 2.Sb4#
- 1...Rh3
- 2.Sb4#
- 1...Rb4
- 2.Sc3#
- 2.Sxb4#
- 1...Rb5
- 2.Sc3#
- 1...Rb6
- 2.Sc3#
- 1...Rb7
- 2.Sc3#
- 1...Rb8
- 2.Sc3#
- 1...Sg5
- 2.Rxc5#
- 1...Sc7
- 2.Rxc5#
- 1...Sg7
- 2.Rxc5#
- 1...Sd8
- 2.Rxc5#
- 1...Sxf8!
- 1...Sxf4
- 1.Rd2?
- 1...Sxf4
- 2.Rxc5#
- 1...Rb2
- 2.Sc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sxc3#
- 2.Sb4#
- 1...Rd3
- 2.Sb4#
- 1...Re3
- 2.Sb4#
- 1...Rf3
- 2.Sb4#
- 1...Rg3
- 2.Sb4#
- 1...Rh3
- 2.Sb4#
- 1...Rb4
- 2.Sc3#
- 2.Sxb4#
- 1...Rb5
- 2.Sc3#
- 1...Rb6
- 2.Sc3#
- 1...Rb7
- 2.Sc3#
- 1...Rb8
- 2.Sc3#
- 1...Sg5
- 2.Rxc5#
- 1...Sc7
- 2.Rxc5#
- 1...Sg7
- 2.Rxc5#
- 1...Sd8
- 2.Rxc5#
- 1...Sf8
- 2.Rxc5#
- 1...Rb1+!
- 1...Sxf4
- 1.Rd3?
- 1...Rxd3
- 2.Sb4#
- 1...Sxf4
- 2.Rxc5#
- 1...Rb2
- 2.Sc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sxc3#
- 2.Sb4#
- 1...Rb4
- 2.Sc3#
- 2.Sxb4#
- 1...Rb5
- 2.Sc3#
- 1...Rb6
- 2.Sc3#
- 1...Rb7
- 2.Sc3#
- 1...Rb8
- 2.Sc3#
- 1...Sg5
- 2.Rxc5#
- 1...Sc7
- 2.Rxc5#
- 1...Sg7
- 2.Rxc5#
- 1...Sd8
- 2.Rxc5#
- 1...Sf8
- 2.Rxc5#
- 1...Rb1+!
- 1...Rxd3
- 1.Rxd4+?
- 1...Sxd4
- 2.Rxc5#
- 1...Kxd4!
- 1...Sxd4
- 1.Rb5?
- 1...Rxb5
- 2.Sc3#
- 1...Sxf4
- 2.Rxc5#
- 1...Rb1
- 2.Sc3#
- 1...Rb2
- 2.Sc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sxc3#
- 2.Sb4#
- 1...Rd3
- 2.Sb4#
- 1...Re3
- 2.Sb4#
- 1...Rf3
- 2.Sb4#
- 1...Rg3
- 2.Sb4#
- 1...Rh3
- 2.Sb4#
- 1...Rb4
- 2.Sc3#
- 2.Sxb4#
- 1...Sg5
- 2.Rxc5#
- 1...Sc7
- 2.Rxc5#
- 1...Sg7
- 2.Rxc5#
- 1...Sd8
- 2.Rxc5#
- 1...Sf8
- 2.Rxc5#
- 1...cxb5!
- 1...Rxb5
- 1.h3?
- 1...Sxf4
- 2.Rxc5#
- 1...Rb1
- 2.Sc3#
- 1...Rb2
- 2.Sc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sxc3#
- 2.Sb4#
- 1...Rd3
- 2.Sb4#
- 1...Re3
- 2.Sb4#
- 1...Rf3
- 2.Sb4#
- 1...Rg3
- 2.Sb4#
- 1...Rb4
- 2.Sc3#
- 2.Sxb4#
- 1...Rb5
- 2.Sc3#
- 1...Rb6
- 2.Sc3#
- 1...Rb7
- 2.Sc3#
- 1...Rb8
- 2.Sc3#
- 1...Sg5
- 2.Rxc5#
- 1...Sc7
- 2.Rxc5#
- 1...Sg7
- 2.Rxc5#
- 1...Sd8
- 2.Rxc5#
- 1...Sf8
- 2.Rxc5#
- 1...Rxh3+!
- 1...Sxf4
- 1.h4?
- 1...Sxf4
- 2.Rxc5#
- 1...Rb1
- 2.Sc3#
- 1...Rb2
- 2.Sc3#
- 1...Ra3
- 2.Sb4#
- 1...Rc3
- 2.Sxc3#
- 2.Sb4#
- 1...Rd3
- 2.Sb4#
- 1...Re3
- 2.Sb4#
- 1...Rf3
- 2.Sb4#
- 1...Rg3
- 2.Sb4#
- 1...Rb4
- 2.Sc3#
- 2.Sxb4#
- 1...Rb5
- 2.Sc3#
- 1...Rb6
- 2.Sc3#
- 1...Rb7
- 2.Sc3#
- 1...Rb8
- 2.Sc3#
- 1...Sg5
- 2.Rxc5#
- 1...Sc7
- 2.Rxc5#
- 1...Sg7
- 2.Rxc5#
- 1...Sd8
- 2.Rxc5#
- 1...Sf8
- 2.Rxc5#
- 1...Rh3+!
- 1...Sxf4
- 1.Bf8?
- Keys
- 1.Sc4!
- 1...Kxc4
- 2.Bxe6#
- 1...Sxf4
- 2.Rxc5#
- 1...Rb1
- 2.Se3#
- 1...Rb2
- 2.Se3#
- 1...Ra3
- 2.Sb6#
- 1...Rc3
- 2.Sb6#
- 1...Rd3
- 2.Sb6#
- 1...Re3
- 2.Sxe3#
- 2.Sb6#
- 1...Rf3
- 2.Sb6#
- 1...Rg3
- 2.Sb6#
- 1...Rh3
- 2.Sb6#
- 1...Rb4
- 2.Se3#
- 1...Rb5
- 2.Se3#
- 1...Rb6
- 2.Se3#
- 2.Sxb6#
- 1...Rb7
- 2.Se3#
- 1...Rb8
- 2.Se3#
- 1...Sg5
- 2.Rxc5#
- 1...Sc7
- 2.Rxc5#
- 1...Sg7
- 2.Rxc5#
- 1...Sd8
- 2.Rxc5#
- 1...Sf8
- 2.Rxc5#
- 1...Kxc4
- 1.Sc4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 10
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- R(a);N_GUARD,P_PINR(A)::S(C)
- R(a);N_GUARD::S(C)
- R(a);N_GUARD,N_SPINB(b)::S(C)
- R(a);N_GUARD,P_PINP(D)::S(C)
- R(a);N_GUARD,N_SPINP(c)::S(C)
- S(f);N_GUARD,XP(E)::R1(F),XP(c)
- S(f);N_GUARD::R1(F),XP(c)
- Tries
- Try
- B(I);
- Vars
- S(f);N_GUARD,XP(E)::R1(F),XP(c)
- R(a);N_GUARD,P_PINR(A)::S(C)
- R(a);N_GUARD::S(C)
- R(a);N_GUARD,N_SPINB(b)::S(C)
- R(a);N_GUARD,P_PINP(D)::S(C)
- R(a);N_GUARD,N_SPINP(c)::S(C)
- S(f);N_GUARD::R1(F),XP(c)
- Refutation
- S(f);XB(I)
- Try
- R(A);
- Vars
- S(f);N_GUARD,XP(E)::R1(F),XP(c)
- R(a);N_GUARD::S(C)
- R(a);N_GUARD,N_SPINB(b)::S(C)
- R(a);N_GUARD,P_PINP(D)::S(C)
- R(a);N_GUARD,N_SPINP(c)::S(C)
- S(f);N_GUARD::R1(F),XP(c)
- Refutation
- R(a);CHECK
- Try
- R(A);
- Vars
- R(a);N_GUARD,N_SPINB(b),XR(A)::S(C)
- S(f);N_GUARD,XP(E)::R1(F),XP(c)
- R(a);N_GUARD::S(C)
- R(a);N_GUARD,N_SPINP(c)::S(C)
- S(f);N_GUARD::R1(F),XP(c)
- Refutation
- R(a);CHECK
- Try
- R(A);CHECK,XB(b)
- Vars
- S(f);SBLOCK,XR(A)::R1(F),XP(c)
- Refutation
- K(d);N_SPINP(c),P-FLIGHT,XR(A)
- Try
- R(F);
- Vars
- R(a);N_GUARD,N_SPINP(c),XR(F)::S(C)
- S(f);N_GUARD,XP(E)::R1(F),XP(c)
- R(a);N_GUARD,P_PINR(A)::S(C)
- R(a);N_GUARD::S(C)
- R(a);N_GUARD,N_SPINB(b)::S(C)
- R(a);N_GUARD,P_PINP(D)::S(C)
- S(f);N_GUARD::R1(F),XP(c)
- Refutation
- P(e);N_SPINP(c),XR(F)
- Try
- P(D);
- Vars
- S(f);N_GUARD,XP(E)::R1(F),XP(c)
- R(a);N_GUARD,P_PINR(A)::S(C)
- R(a);N_GUARD::S(C)
- R(a);N_GUARD,N_SPINB(b)::S(C)
- R(a);N_GUARD,N_SPINP(c)::S(C)
- S(f);N_GUARD::R1(F),XP(c)
- Refutation
- R(a);CHECK,XP(D)
- Try
- P(D);
- Vars
- S(f);N_GUARD,XP(E)::R1(F),XP(c)
- R(a);N_GUARD,P_PINR(A)::S(C)
- R(a);N_GUARD::S(C)
- R(a);N_GUARD,N_SPINB(b)::S(C)
- R(a);N_GUARD,N_SPINP(c)::S(C)
- S(f);N_GUARD::R1(F),XP(c)
- Refutation
- R(a);CHECK
- Try
- Actual
- S(G);
- Vars
- K(d);N_SPINB(b),N_SPINP(c),S_FLIGHT,XS(G)::B(H),XS(f)
- S(f);N_GUARD,XP(E)::R1(F),XP(c)
- R(a);N_GUARD,P_PINR(A)::S(G)
- R(a);N_GUARD::S(G)
- R(a);N_GUARD,N_SPINB(b)::S(G)
- R(a);N_GUARD,P_PINP(D)::S(G)
- R(a);N_GUARD,N_SPINP(c)::S(G)
- S(f);N_GUARD::R1(F),XP(c)
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).