MESON Chess Problem Database
Problem Display
PID: 202650 (8/2K1p3/5PQ1/2Pk2nR/2RB4/3n3N/B5r1/3r4 w - - 0 1)
Karlsson, G
1st Prize, Good Companions, 1923
#2
9 + 6
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ke6
- 2.Rc2#
- 1...Rg1
- 2.Ra4#
- 2.Rb4#
- 1...Rg3
- 2.Ra4#
- 2.Rb4#
- 1...Rg4
- 2.Ra4#
- 2.Rb4#
- 1...Sc1
- 2.Sf4#
- 1...Se1
- 2.Sf4#
- 1...Sb2
- 2.Sf4#
- 1...Sf2
- 2.Sf4#
- 2.Ra4#
- 2.Rb4#
- 1...Sb4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sxc5
- 2.Sf4#
- 1...Se5
- 2.Sf4#
- 1...Ke6
- Tries
- 1.Ba1?
- threat
- 2.Rc2#
- 2.Qe4#
- 1...Ke6
- 2.Rc2#
- 2.Re4#
- 1...Rxa1
- 2.Qe4#
- 1...Rxa2
- 2.Qe4#
- 1...Sxc5
- 2.Sf4#
- 1...Rb2
- 2.Qe4#
- 1...Sb2
- 2.Qe4#
- 1...Rb1
- 2.Qe4#
- 1...Re1
- 2.Rc2#
- 1...Rc2
- 2.Rxc2#
- 2.Qe4#
- 1...Re2
- 2.Rc2#
- 1...Sc1
- 2.Sf4#
- 2.Qe4#
- 1...Sf2
- 2.Sf4#
- 2.Rc1#
- 2.Rc2#
- 1...Sb4
- 2.Sf4#
- 2.Qe4#
- 1...Se5
- 2.Sf4#
- 1...e5
- 2.Rc2#
- 1...Rg4!
- threat
- 1.Bb2?
- threat
- 2.Rc1#
- 2.Rc2#
- 2.Qe4#
- 1...Ke6
- 2.Rc1#
- 2.Rc2#
- 2.Ra4#
- 2.Rb4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rch4#
- 1...Rxb2
- 2.Qe4#
- 1...Sxb2
- 2.Qe4#
- 1...Sxc5
- 2.Sf4#
- 1...Ra1
- 2.Qe4#
- 1...Rc1
- 2.Rxc1#
- 2.Rc2#
- 2.Qe4#
- 1...Re1
- 2.Rc1#
- 2.Rc2#
- 1...Rc2
- 2.Rxc2#
- 2.Qe4#
- 1...Re2
- 2.Rc1#
- 2.Rc2#
- 1...Sc1
- 2.Sf4#
- 2.Rxc1#
- 2.Qe4#
- 1...Sf2
- 2.Sf4#
- 2.Rc1#
- 2.Rc2#
- 1...Sb4
- 2.Sf4#
- 2.Qe4#
- 1...Se5
- 2.Sf4#
- 1...e5
- 2.Rc1#
- 2.Rc2#
- 1...Rg4!
- threat
- 1.Bf2?
- threat
- 2.Re4#
- 2.Qe4#
- 1...Ke5
- 2.Re4#
- 1...Ke6
- 2.Re4#
- 1...Rxf2
- 2.Qe4#
- 1...Sxc5
- 2.Rxc5#
- 1...Rg4
- 2.Re4#
- 1...Ra1
- 2.Qe4#
- 1...Rb1
- 2.Qe4#
- 1...Rc1
- 2.Qe4#
- 1...Re1
- 2.Re4#
- 1...Rd2
- 2.Qe4#
- 1...Sc1
- 2.Qe4#
- 1...Sb2
- 2.Qe4#
- 1...Sb4
- 2.Qe4#
- 1...Se5
- 2.Sf4#
- 1...e5
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Ra4#
- 2.Rb4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rch4#
- 1...Sxf2!
- threat
- 1.Rxg5+?
- 1...Ke6
- 2.Rc2#
- 2.Qg8#
- 2.f7#
- 1...Rxg5
- 2.Ra4#
- 2.Rb4#
- 1...Se5
- 2.Sf4#
- 2.Rxe5#
- 1...e5!
- 1...Ke6
- 1.Qxd3?
- threat
- 2.Sf4#
- 2.Rc2#
- 1...Ke6
- 2.Rc2#
- 1...Rxa2
- 2.Sf4#
- 1...Rg4
- 2.Rc1#
- 2.Rc2#
- 2.Rc3#
- 2.Ra4#
- 2.Rb4#
- 1...Ra1
- 2.Sf4#
- 1...Rb1
- 2.Sf4#
- 1...Rf1
- 2.Rc2#
- 1...Rb2
- 2.Sf4#
- 1...Rc2
- 2.Sf4#
- 2.Rxc2#
- 1...Rf2
- 2.Rc2#
- 1...e5
- 2.Rc2#
- 1...Rxd3!
- threat
- 1.Qf5+?
- 1...Se5
- 2.Sf4#
- 2.Qxe5#
- 1...e5!
- 1...Se5
- 1.Qg8+?
- 1...e6
- 2.Qa8#
- 1...Ke4!
- 1...e6
- 1.fxe7?
- threat
- 2.Qc6#
- 1...Sb4
- 2.Sf4#
- 2.Qf5#
- 1...Se5
- 2.Sf4#
- 1...Rxa2!
- threat
- 1.Ba1?
- Keys
- 1.Be3!
- threat
- 2.Qe4#
- 1...Ke5
- 2.Re4#
- 1...Ke6
- 2.Re4#
- 1...Sxc5
- 2.Rxc5#
- 1...Rg4
- 2.Re4#
- 1...Sf2
- 2.Re4#
- 1...Se5
- 2.Sf4#
- 1...e5
- 2.Rc2#
- threat
- 1.Be3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- K(d);N_SPINS(e),S_FLIGHT::B(A)+R(C)
- S(c);N_GUARD::S(B)
- S(c);N_GUARD::S(B),XS(c)
- S(c);N_GUARD,XP(E)::S(B)
- S(c);N_GUARD,N_SPINS(e)::S(B)
- Tries
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- R(a);XB(D)::QAB1(H)
- R(b);XB(A)::QAB1(H)
- S(c);N_GUARD,XP(E)::S(B)
- R(b);::QAB1(H)
- S(c);::QAB1(H)
- R(a);::QAB1(H)
- R(a);::B(A)+R(C)
- R(b);::B(A)+R(C)
- S(c);N_GUARD,N_SPINS(e)::S(B)
- P(f);N_SPINS(e)::B(A)+R(C)
- Refutation
- R(b);
- Try
- B(D);
- Threat
- DUALS(3)
- Vars
- R(b);XB(D)::QAB1(H)
- S(c);XB(D)::QAB1(H)
- S(c);N_GUARD,XP(E)::S(B)
- R(a);::QAB1(H)
- S(c);N_GUARD,N_SPINS(e)::S(B)
- Refutation
- R(b);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- K(d);P-FLIGHT::R1(C)
- K(d);N_SPINS(e),S_FLIGHT::B(A)+R(C),DCHECK
- R(b);XB(D)::QAB1(H)
- S(c);OGATE,XP(E)::B(A)+R(C),DCHECK,XS(c)
- R(b);::B(A)+R(C)
- R(a);::QAB1(H)
- R(a);::B(A)+R(C)
- S(c);::QAB1(H)
- S(c);N_GUARD,N_SPINS(e),SBLOCK::S(B)
- Refutation
- S(c);XB(D)
- Try
- R(F);CHECK,XS(e)
- Refutation
- P(f);P_SPINP(f)
- Try
- Q(H);XS(c)
- Threat
- DUALS(2)
- Vars
- K(d);N_SPINS(e),S_FLIGHT::B(A)+R(C)
- R(b);XB(A)::S(B)
- R(a);::S(B)
- R(a);::B(A)+R(C)
- R(b);::S(B)
- R(b);::B(A)+R(C)
- P(f);N_SPINS(e)::B(A)+R(C)
- Refutation
- R(a);XQ(H)
- Try
- Q(H);CHECK,N_PINS(e)
- Refutation
- P(f);P_SPINP(f)
- Try
- Q(H);CHECK
- Vars
- P(f);P_SPINP(f),SBLOCK::QAB(H)
- Refutation
- K(d);N_SPINS(e),S_FLIGHT
- Try
- P(G);XP(f)
- Threat
- QAB1(H)
- Vars
- S(c);N_GUARD,N_SPINS(e)::S(B)
- Refutation
- R(b);XB(A)
- Try
- Actual
- B(D);
- Threat
- QAB1(H)
- Vars
- K(d);P-FLIGHT::R1(C)
- K(d);N_SPINS(e),S_FLIGHT::B(A)+R(C),DCHECK
- S(c);OGATE,XP(E)::B(A)+R(C),DCHECK,XS(c)
- R(b);N_GUARD::B(A)+R(C)
- S(c);S_CUTR(b)::B(A)+R(C)
- S(c);N_GUARD,N_SPINS(e),SBLOCK::S(B)
- P(f);N_SPINS(e),SBLOCK::B(A)+R(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).