MESON Chess Problem Database
Problem Display
PID: 237288 (6n1/2N2R2/QK4p1/1nP1k3/1pR2N2/3p2qB/8/b2br1B1 w - - 0 1)
Hoffmann, Fritz
Schweizerische Arbeiter Schachzeitung, 1971
#2
9 + 10
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qf2
- 2.Sxd3#
- 2.Sxg6#
- 1...Qh2
- 2.Sxd3#
- 2.Sxg6#
- 1...Qh4
- 2.Sxd3#
- 2.Sxg6#
- 1...Qxg1
- 2.Sxd3#
- 1...Qg2
- 2.Sxd3#
- 1...Qe3
- 2.Sxg6#
- 1...Qf3
- 2.Sxg6#
- 1...Qxh3
- 2.Sxg6#
- 1...Qg4
- 2.Sxd3#
- 1...Qg5
- 2.Sxd3#
- 1...Bf3
- 2.Sxd3#
- 1...Bg4
- 2.Sxg6#
- 1...Sd6
- 2.Qxa1#
- 1...Sa7
- 2.Qxa1#
- 1...Sxc7
- 2.Qxa1#
- 1...Sf6
- 2.Re7#
- 1...g5
- 2.Sg6#
- 2.Rf5#
- 1...Qf2
- Tries
- 1.Ka5?
- threat
- 2.Qe6#
- 1...Qxh3
- 2.Sxg6#
- 1...Sxc7
- 2.Qd6#
- 1...Qg4
- 2.Sxd3#
- 1...Bg4
- 2.Sxg6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd4!
- threat
- 1.Kxb5?
- threat
- 2.Qxa1#
- 2.Qd6#
- 2.Qe6#
- 1...Qxf4
- 2.Qd6#
- 2.Qe6#
- 1...Qxg1
- 2.Sxd3#
- 2.Qd6#
- 2.Qe6#
- 1...Qxh3
- 2.Sxg6#
- 2.Qxa1#
- 2.Qd6#
- 1...Bd4
- 2.Qe6#
- 1...Qf2
- 2.Sxd3#
- 2.Sxg6#
- 2.Qd6#
- 2.Qe6#
- 1...Qh2
- 2.Sxd3#
- 2.Sxg6#
- 2.Qd6#
- 2.Qe6#
- 1...Qg2
- 2.Sxd3#
- 2.Qd6#
- 2.Qe6#
- 1...Qe3
- 2.Sxg6#
- 2.Qd6#
- 2.Qe6#
- 1...Qg4
- 2.Sxd3#
- 2.Qxa1#
- 2.Qd6#
- 1...Re2
- 2.Qd6#
- 2.Qe6#
- 1...Re4
- 2.Qd6#
- 2.Qe6#
- 1...Bb2
- 2.Qd6#
- 2.Qe6#
- 1...Bc3
- 2.Qd6#
- 2.Qe6#
- 1...Bc2
- 2.Qd6#
- 2.Qe6#
- 1...Be2
- 2.Qd6#
- 2.Qe6#
- 1...Bb3
- 2.Qd6#
- 2.Qe6#
- 1...Bf3
- 2.Sxd3#
- 2.Qd6#
- 2.Qe6#
- 1...Bg4
- 2.Sxg6#
- 2.Qd6#
- 1...Bh5
- 2.Qd6#
- 2.Qe6#
- 1...d2
- 2.Qd6#
- 2.Qe6#
- 1...b3
- 2.Qd6#
- 2.Qe6#
- 1...Ba4+!
- threat
- 1.Qb7?
- threat
- 2.Qd5#
- 1...Sxc7
- 2.Qxc7#
- 1...Qg2
- 2.Sxd3#
- 1...Qf3
- 2.Sxg6#
- 1...Bf3
- 2.Sxd3#
- 1...Sc3
- 2.Bd4#
- 1...Sf6
- 2.Re7#
- 1...Se7!
- threat
- 1.Qc8?
- threat
- 2.Qe6#
- 1...Qxh3
- 2.Sxg6#
- 1...Sxc7
- 2.Qxc7#
- 1...Qg4
- 2.Sxd3#
- 1...Bg4
- 2.Sxg6#
- 1...Sd4!
- threat
- 1.Qxa1+?
- 1...Sd4
- 2.Qxd4#
- 1...Sc3!
- 1...Sd4
- 1.Ka5?
- Keys
- 1.Qa8!
- threat
- 2.Qd5#
- 1...Sxc7
- 2.Qxa1#
- 1...Qg2
- 2.Sxd3#
- 1...Qf3
- 2.Sxg6#
- 1...Bf3
- 2.Sxd3#
- 1...Sc3
- 2.Bd4#
- 1...Sf6
- 2.Re7#
- 1...Se7
- 2.Qh8#
- threat
- 1.Qa8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 8
- Sets
- Q(e);N_GUARD,P_PINP(E),XB(A)::S(D),XP(d)
- Q(e);N_GUARD::S(D),XP(d)
- Q(e);N_GUARD,P_PINP(E)::S(D),XP(i)
- Q(e);N_GUARD::S(D),XP(i)
- Q(e);N_GUARD,XB(B)::S(D),XP(i)
- B(b);S_CUTQ(e)::S(D),XP(d)
- B(b);S_CUTQ(e)::S(D),XP(i)
- S(g);N_GUARD::QAB(F),XB(a)
- S(g);N_GUARD,XS(H)::QAB(F),XB(a)
- S(j);N_GUARD,SBLOCK::R(I)
- Tries
- Try
- K(G);S_FLIGHT
- Threat
- QAR1(F)
- Vars
- Q(e);N_GUARD,XB(B)::S(D),XP(i)
- S(g);N_GUARD,XS(H)::QAB1(F)
- Q(e);N_GUARD::S(D),XP(d)
- B(b);S_CUTQ(e)::S(D),XP(i)
- S(g);N_GUARD::QAB1(F),XS(g)
- Refutation
- S(g);
- Try
- K(G);P-FLIGHT,XS(g)
- Threat
- DUALS(3)
- Vars
- B(a);::QAR1(F)
- Refutation
- B(b);CHECK
- Try
- Q(F);
- Threat
- QAR1(F)
- Vars
- S(g);OGATE,XS(H)::QAB(F),XS(g)
- Q(e);N_GUARD::S(D),XP(d)
- Q(e);N_GUARD::S(D),XP(i)
- B(b);S_CUTQ(e)::S(D),XP(d)
- S(g);N_GUARD,S_CUTB(a)::B(A)
- S(j);N_GUARD,SBLOCK::R(I)
- Refutation
- S(j);
- Try
- Q(F);
- Threat
- QAR1(F)
- Vars
- Q(e);N_GUARD,XB(B)::S(D),XP(i)
- S(g);OGATE,XS(H)::QAB(F),XS(g)
- Q(e);N_GUARD::S(D),XP(d)
- B(b);S_CUTQ(e)::S(D),XP(i)
- Refutation
- S(g);
- Try
- Q(F);CHECK,XB(a)
- Vars
- S(g);N_GUARD,P_SPINS(g)::QAB1(F),XS(g)
- Refutation
- S(g);P_SPINS(g)
- Try
- Actual
- Q(F);
- Threat
- QAR1(F)
- Vars
- S(g);N_GUARD,XS(H)::QAB(F),XB(a)
- Q(e);N_GUARD::S(D),XP(d)
- Q(e);N_GUARD::S(D),XP(i)
- B(b);S_CUTQ(e)::S(D),XP(d)
- S(g);N_GUARD,S_CUTB(a)::B(A)
- S(j);N_GUARD,SBLOCK::R(I)
- S(j);OGATE::QAB(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).