MESON Chess Problem Database
Problem Display
PID: 233918 (K3R3/Pp1n4/1p1Q1p1B/1P1b1Pr1/3k4/1P1p1P2/1P1n1P2/N5N1 w - - 0 1)
Larsen, Lars Aksglade (= Aksglade, Lars)
Skakbladet, 1942
#2
13 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rxg1
- 2.Be3#
- 1...Rg2
- 2.Be3#
- 1...Rg3
- 2.Be3#
- 1...Rg4
- 2.Be3#
- 1...Rxf5
- 2.Be3#
- 1...Rh5
- 2.Be3#
- 1...Rg6
- 2.Be3#
- 1...Rg7
- 2.Be3#
- 1...Rg8
- 2.Be3#
- 1...Sb1
- 2.Re4#
- 1...Sf1
- 2.Re4#
- 1...Sxb3
- 2.Re4#
- 1...Sxf3
- 2.Sxf3#
- 1...Sc4
- 2.Re4#
- 1...Se4
- 2.Rxe4#
- 1...Sc5
- 2.Qxf6#
- 1...Se5
- 2.Qxb6#
- 1...Sb8
- 2.Qxb6#
- 1...Sf8
- 2.Qxb6#
- 1...Rxg1
- Tries
- 1.Sh3?
- 1...Rxf5
- 2.Be3#
- 1...Sxb3
- 2.Re4#
- 1...Rg1
- 2.Be3#
- 1...Rg2
- 2.Be3#
- 1...Rg3
- 2.Be3#
- 1...Rg4
- 2.Be3#
- 1...Rh5
- 2.Be3#
- 1...Rg6
- 2.Be3#
- 1...Rg7
- 2.Be3#
- 1...Rg8
- 2.Be3#
- 1...Sb1
- 2.Re4#
- 1...Sf1
- 2.Re4#
- 1...Sc4
- 2.Re4#
- 1...Se4
- 2.Rxe4#
- 1...Sc5
- 2.Qxf6#
- 1...Se5
- 2.Qxb6#
- 1...Sb8
- 2.Qxb6#
- 1...Sf8
- 2.Qxb6#
- 1...Sxf3!
- 1...Rxf5
- 1.Bxg5?
- threat
- 2.Be3#
- 1...Sxb3
- 2.Re4#
- 1...Sf1
- 2.Re4#
- 1...Sc4
- 2.Re4#
- 1...fxg5!
- threat
- 1.Re1?
- 1...Rxg1
- 2.Be3#
- 1...Rxf5
- 2.Be3#
- 1...Sxb3
- 2.Re4#
- 1...Sxf3
- 2.Sxf3#
- 1...Rg2
- 2.Be3#
- 1...Rg3
- 2.Be3#
- 1...Rg4
- 2.Be3#
- 1...Rh5
- 2.Be3#
- 1...Rg6
- 2.Be3#
- 1...Rg7
- 2.Be3#
- 1...Sb1
- 2.Re4#
- 1...Sf1
- 2.Re4#
- 1...Sc4
- 2.Re4#
- 1...Se4
- 2.Rxe4#
- 1...Sc5
- 2.Qxf6#
- 1...Se5
- 2.Qxb6#
- 1...Sb8
- 2.Qxb6#
- 1...Sf8
- 2.Qxb6#
- 1...Rg8+!
- 1...Rxg1
- 1.Re7?
- 1...Rxg1
- 2.Be3#
- 1...Rxf5
- 2.Be3#
- 1...Sxb3
- 2.Re4#
- 1...Sxf3
- 2.Sxf3#
- 1...Rg2
- 2.Be3#
- 1...Rg3
- 2.Be3#
- 1...Rg4
- 2.Be3#
- 1...Rh5
- 2.Be3#
- 1...Rg6
- 2.Be3#
- 1...Rg7
- 2.Be3#
- 1...Sb1
- 2.Re4#
- 1...Sf1
- 2.Re4#
- 1...Sc4
- 2.Re4#
- 1...Se4
- 2.Rxe4#
- 1...Sc5
- 2.Qxf6#
- 1...Se5
- 2.Qxb6#
- 1...Sb8
- 2.Qxb6#
- 1...Sf8
- 2.Qxb6#
- 1...Rg8+!
- 1...Rxg1
- 1.Qxb6+?
- 1...Sc5
- 2.Qxf6#
- 1...Sxb6+!
- 1...Sc5
- 1.Sh3?
- Keys
- 1.Rc8!
- 1...Rxg1
- 2.Be3#
- 1...Rxf5
- 2.Be3#
- 1...Sxb3
- 2.Sxb3#
- 1...Sxf3
- 2.Rc4#
- 1...Rg2
- 2.Be3#
- 1...Rg3
- 2.Be3#
- 1...Rg4
- 2.Be3#
- 1...Rh5
- 2.Be3#
- 1...Rg6
- 2.Be3#
- 1...Rg7
- 2.Be3#
- 1...Rg8
- 2.Be3#
- 1...Sb1
- 2.Rc4#
- 1...Sf1
- 2.Rc4#
- 1...Sc4
- 2.Rxc4#
- 1...Se4
- 2.Rc4#
- 1...Sc5
- 2.Qxf6#
- 1...Se5
- 2.Qxb6#
- 1...Sb8
- 2.Qxf6#
- 1...Sf8
- 2.Qxf6#
- 1...Rxg1
- 1.Rc8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(e);OGATE,XS(B)::B(J)
- R(e);OGATE::B(J)
- R(e);OGATE,XP(H)::B(J)
- R(e);OGATE,P_PINR(M)::B(J)
- S(a);N_GUARD::R1(M)
- S(a);N_GUARD,XP(E)::R1(M)
- S(a);XP(F)::S(B),XS(a)
- S(a);N_GUARD::R1(M),XS(a)
- S(i);N_GUARD,SBLOCK::QAB(I),XP(g)
- S(i);N_GUARD::QAB(I),XP(f)
- Tries
- Try
- S(B);
- Vars
- R(e);OGATE,XP(H)::B(J)
- S(a);N_GUARD,XP(E)::R1(M)
- R(e);OGATE::B(J)
- R(e);OGATE,P_PINR(M)::B(J)
- S(a);N_GUARD::R1(M)
- S(a);N_GUARD::R1(M),XS(a)
- S(i);N_GUARD,SBLOCK::QAB(I),XP(g)
- S(i);N_GUARD::QAB(I),XP(f)
- Refutation
- S(a);XP(F)
- Try
- B(J);XR(e)
- Threat
- B(J)
- Vars
- S(a);N_GUARD,XP(E)::R1(M)
- S(a);N_GUARD::R1(M)
- Refutation
- P(g);XB(J)
- Try
- R(M);
- Vars
- R(e);OGATE,XS(B)::B(J)
- R(e);OGATE,XP(H)::B(J)
- S(a);N_GUARD,XP(E)::R1(M)
- S(a);XP(F)::S(B),XS(a)
- R(e);OGATE::B(J)
- S(a);N_GUARD::R1(M)
- S(a);N_GUARD::R1(M),XS(a)
- S(i);N_GUARD,SBLOCK::QAB(I),XP(g)
- S(i);N_GUARD::QAB(I),XP(f)
- Refutation
- R(e);CHECK
- Try
- R(M);
- Vars
- R(e);OGATE,XS(B)::B(J)
- R(e);OGATE,XP(H)::B(J)
- S(a);N_GUARD,XP(E)::R1(M)
- S(a);XP(F)::S(B),XS(a)
- R(e);OGATE::B(J)
- S(a);N_GUARD::R1(M)
- S(a);N_GUARD::R1(M),XS(a)
- S(i);N_GUARD,SBLOCK::QAB(I),XP(g)
- S(i);N_GUARD::QAB(I),XP(f)
- Refutation
- R(e);CHECK
- Try
- Q(I);CHECK,N_PINB(d),XP(f)
- Vars
- S(i);N_GUARD,P_SPINS(i),SBLOCK::QAB(I),XP(g)
- Refutation
- S(i);CHECK,XQ(I)
- Try
- Actual
- R(M);
- Vars
- R(e);OGATE,XS(B)::B(J)
- R(e);OGATE,XP(H)::B(J)
- S(a);XP(E)::S(A),XS(a)
- S(a);N_GUARD,XP(F)::R1(M)
- R(e);OGATE::B(J)
- R(e);OGATE,P_PINR(M)::B(J)
- S(a);N_GUARD::R1(M)
- S(a);N_GUARD::R1(M),XS(a)
- S(i);N_GUARD::QAB(I),XP(g)
- S(i);N_GUARD,SBLOCK::QAB(I),XP(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).