MESON Chess Problem Database
Problem Display
PID: 160541 (8/3p2p1/3p2Nb/3PPk1P/7Q/4nP1K/4P3/8 w - - 0 1)
Ahs, Carl Johan Mathias
Vart Hem, 1935
#2
8 + 6
| 15148 | Sadier Collection | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Bf4
- 2.Qxf4#
- 1...Bg5
- 2.Qe4#
- 1...Sd1
- 2.Qg4#
- 2.e4#
- 1...Sf1
- 2.Qg4#
- 2.e4#
- 1...Sc2
- 2.Qg4#
- 2.e4#
- 1...Sg2
- 2.Qg4#
- 2.e4#
- 1...Sc4
- 2.Qg4#
- 2.e4#
- 1...Sg4
- 2.Qxg4#
- 2.e4#
- 1...Sxd5
- 2.Qg4#
- 1...dxe5
- 2.Se7#
- 1...Bf4
- Tries
- 1.Kh2?
- 1...Bf4+
- 2.Qxf4#
- 1...Sg4+
- 2.Qxg4#
- 1...Sxd5
- 2.Qg4#
- 1...dxe5
- 2.Se7#
- 1...Bg5
- 2.Qe4#
- 1...Sd1
- 2.Qg4#
- 2.e4#
- 1...Sc2
- 2.Qg4#
- 2.e4#
- 1...Sg2
- 2.Qg4#
- 2.e4#
- 1...Sc4
- 2.Qg4#
- 2.e4#
- 1...Sf1+!
- 1...Bf4+
- 1.Kg3?
- 1...Bf4+
- 2.Qxf4#
- 1...Sxd5
- 2.Qg4#
- 1...dxe5
- 2.Se7#
- 1...Bg5
- 2.Qe4#
- 1...Sd1
- 2.Qg4#
- 2.e4#
- 1...Sc2
- 2.Qg4#
- 2.e4#
- 1...Sg2
- 2.Qg4#
- 2.e4#
- 1...Sc4
- 2.Qg4#
- 2.e4#
- 1...Sg4
- 2.Qxg4#
- 2.e4#
- 1...Sf1+!
- 1...Bf4+
- 1.Qg3?
- threat
- 2.Sh4#
- 2.Se7#
- 1...Sxd5
- 2.Qg4#
- 1...dxe5
- 2.Qxe5#
- 1...Sg4
- 2.Qxg4#
- 1...Bf4
- 2.Qxf4#
- 1...Sg2
- 2.Se7#
- 2.Qg4#
- 2.e4#
- 1...Bg5!
- threat
- 1.Qd4?
- 1...Sxd5
- 2.Qg4#
- 1...dxe5
- 2.Qxe5#
- 1...Bf4
- 2.Qxf4#
- 1...Bg5
- 2.Qd3#
- 2.Qe4#
- 1...Sd1
- 2.Qg4#
- 1...Sf1
- 2.Qg4#
- 1...Sc2
- 2.Qg4#
- 1...Sg2
- 2.Qg4#
- 1...Sc4
- 2.Qg4#
- 1...Sg4
- 2.Qxg4#
- 1...Kg5!
- 1...Sxd5
- 1.Kh2?
- Keys
- 1.Qe7!
- 1...Sxd5
- 2.e4#
- 1...dxe5
- 2.Qxe5#
- 1...Bf4
- 2.Sh4#
- 1...Bg5
- 2.Qxd7#
- 1...Sd1
- 2.e4#
- 1...Sf1
- 2.e4#
- 1...Sc2
- 2.e4#
- 1...Sg2
- 2.e4#
- 1...Sc4
- 2.e4#
- 1...Sg4
- 2.e4#
- 1...Sxd5
- 1.Qe7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- B(d);N_GUARD::QAR1(D),XB(d)
- B(d);SBLOCK::QAB1(D)
- S(a);N_GUARD,XP(E)::QAB1(D)
- P(c);SBLOCK,XP(F)::S(H)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- B(d);CHECK,N_GUARD::QAR1(D),XB(d)
- S(a);CHECK,N_GUARD::QAB1(D),XS(a)
- S(a);N_GUARD,XP(E)::QAB1(D)
- P(c);SBLOCK,XP(F)::S(H)
- B(d);SBLOCK::QAB1(D)
- Refutation
- S(a);CHECK
- Try
- K(C);P-FLIGHT
- Vars
- B(d);CHECK,N_GUARD::QAR1(D),XB(d)
- S(a);N_GUARD,XP(E)::QAB1(D)
- P(c);SBLOCK,XP(F)::S(H)
- B(d);SBLOCK::QAB1(D)
- Refutation
- S(a);CHECK
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD,XP(E)::QAB1(D)
- P(c);OGATE,XP(F)::QAR1(D),XP(c)
- S(a);N_GUARD::QAB1(D),XS(a)
- B(d);N_GUARD::QAR1(D),XB(d)
- Refutation
- B(d);
- Try
- Q(D);
- Vars
- S(a);N_GUARD,XP(E)::QAB1(D)
- P(c);OGATE,XP(F)::QAR1(D),XP(c)
- B(d);N_GUARD::QAR1(D),XB(d)
- S(a);N_GUARD::QAB1(D)
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- K(b);P-FLIGHT
- Try
- Actual
- Q(D);
- Vars
- S(a);OGATE,XP(E)::P(A)
- P(c);OGATE,XP(F)::QAR1(D),XP(c)
- B(d);SBLOCK::S(H)
- B(d);SBLOCK::QAB(D),XP(e)
- S(a);OGATE::P(A)
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).