MESON Chess Problem Database
Problem Display
PID: 45669 (N2b3n/p3p3/Rq2k2N/p2pP1R1/B3p3/4Q3/p5p1/B5Kb w - - 0 1)
Jonsson, Gustav
2nd Prize, Tidskrift for Schack, 1958
#2
9 + 12
| 3976 | FIDE Album (1956-1958) | 1961 |
SOLUTION
- SOUND
- Sets
- 1...Qxa6
- 2.Qh3#
- 1...Qc6
- 2.Qh3#
- 1...Qd6
- 2.Qh3#
- 1...Bc7
- 2.Sxc7#
- 1...Sg6
- 2.Rxg6#
- 1...Sf7
- 2.Rg6#
- 1...d4
- 2.Qb3#
- 1...Qxa6
- Tries
- 1.Sxb6?
- threat
- 2.Bd7#
- 2.Qh3#
- 1...axb6
- 2.Qh3#
- 1...Bxb6!
- threat
- 1.Bb5?
- 1...Qxa6
- 2.Qh3#
- 1...Qc6
- 2.Qh3#
- 1...d4
- 2.Qb3#
- 1...Qd6
- 2.Qh3#
- 1...Bc7
- 2.Sxc7#
- 1...Sg6
- 2.Rxg6#
- 1...Sf7
- 2.Rg6#
- 1...a4!
- 1...Qxa6
- 1.Be8?
- 1...Qxa6
- 2.Qh3#
- 1...d4
- 2.Qb3#
- 1...Qc6
- 2.Rxc6#
- 2.Qh3#
- 1...Qd6
- 2.Qh3#
- 1...Bc7
- 2.Sxc7#
- 1...Sg6
- 2.Rxg6#
- 1...Sf7
- 2.Rg6#
- 1...a4!
- 1...Qxa6
- 1.Rg7?
- 1...Qxa6
- 2.Qh3#
- 1...Qc6
- 2.Qh3#
- 1...Qd6
- 2.Qh3#
- 1...Bc7
- 2.Sxc7#
- 1...Sg6
- 2.Rxg6#
- 1...Sf7
- 2.Rg6#
- 1...d4!
- 1...Qxa6
- 1.Rg8?
- 1...Qxa6
- 2.Qh3#
- 1...Qc6
- 2.Qh3#
- 1...Qd6
- 2.Qh3#
- 1...Bc7
- 2.Sxc7#
- 1...Sg6
- 2.Rxg6#
- 1...Sf7
- 2.Rg6#
- 1...d4!
- 1...Qxa6
- 1.Rxb6+?
- 1...axb6
- 2.Qh3#
- 1...Bxb6!
- 1...axb6
- 1.Qc5?
- 1...Qc6
- 2.Qxc6#
- 1...Qd6
- 2.Qc8#
- 1...Bc7
- 2.Sxc7#
- 1...Sg6
- 2.Rxg6#
- 1...Sf7
- 2.Rg6#
- 1...e3
- 2.Qc8#
- 1...d4
- 2.Qc4#
- 1...Qxa6!
- 1...Qc6
- 1.Sxb6?
- Keys
- 1.Qf2!
- 1...Qxa6
- 2.Qf5#
- 1...Qc6
- 2.Qf5#
- 1...d4
- 2.Qxa2#
- 1...Qd6
- 2.Qf5#
- 1...Bc7
- 2.Sxc7#
- 1...Sg6
- 2.Rxg6#
- 1...Sf7
- 2.Rg6#
- 1...e3
- 2.Qf5#
- 1...Qxa6
- 1.Qf2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(g);N_PINQ(C),N_SPINQ(g),XR(G)::QAB(C)
- Q(g);N_PINQ(C)::QAB(C)
- B(k);N_GUARD::S(I),XB(k)
- S(l);N_GUARD::R(F),XS(l)
- S(l);N_GUARD::R(F)
- P(f);N_PINQ(C)::QAB(C)
- Tries
- Try
- S(I);N_SPINQ(C),XQ(g)
- Threat
- DUALS(2)
- Vars
- P(i);P_SPINP(i),XS(I)::QAB(C)
- Refutation
- B(k);P_PINQ(C),P_SPINB(k),XS(I)
- Try
- B(D);
- Vars
- Q(g);N_PINQ(C),N_SPINQ(g),XR(G)::QAB(C)
- Q(g);N_PINQ(C)::QAB(C)
- P(f);N_PINQ(C)::QAB(C)
- B(k);N_GUARD::S(I),XB(k)
- S(l);N_GUARD::R(F),XS(l)
- S(l);N_GUARD::R(F)
- Refutation
- P(e);
- Try
- B(D);
- Vars
- Q(g);N_PINQ(C),N_SPINQ(g),XR(G)::QAB(C)
- P(f);N_PINQ(C)::QAB(C)
- Q(g);N_PINQ(C)::QAB(C)
- B(k);N_GUARD::S(I),XB(k)
- S(l);N_GUARD::R(F),XS(l)
- S(l);N_GUARD::R(F)
- Refutation
- P(e);
- Try
- R(F);
- Vars
- Q(g);N_PINQ(C),N_SPINQ(g),XR(G)::QAB(C)
- Q(g);N_PINQ(C)::QAB(C)
- B(k);N_GUARD::S(I),XB(k)
- S(l);N_GUARD::R(F),XS(l)
- S(l);N_GUARD::R(F)
- Refutation
- P(f);N_PINQ(C)
- Try
- R(F);
- Vars
- Q(g);N_PINQ(C),N_SPINQ(g),XR(G)::QAB(C)
- Q(g);N_PINQ(C)::QAB(C)
- B(k);N_GUARD::S(I),XB(k)
- S(l);N_GUARD::R(F),XS(l)
- S(l);N_GUARD::R(F)
- Refutation
- P(f);N_PINQ(C)
- Try
- R(G);CHECK,N_SPINQ(C),XQ(g)
- Vars
- P(i);XR(G)::QAB(C)
- Refutation
- B(k);P_PINQ(C),XR(G)
- Try
- Q(C);
- Vars
- Q(g);N_PINQ(C)::QAR2(C),XQ(g)
- Q(g);N_PINQ(C)::QAB(C)
- B(k);N_GUARD::S(I),XB(k)
- S(l);N_GUARD::R(F),XS(l)
- S(l);N_GUARD::R(F)
- P(d);N_PINQ(C)::QAB(C)
- P(f);N_PINQ(C)::QAB(C)
- Refutation
- Q(g);N_PINQ(C),N_SPINQ(g),XR(G)
- Try
- Actual
- Q(C);
- Vars
- Q(g);N_PINQ(C),N_SPINQ(g),XR(G)::QAB1(C)
- Q(g);N_PINQ(C)::QAB1(C)
- P(f);N_PINQ(C)::QAB(C),XP(b)
- B(k);N_GUARD::S(I),XB(k)
- S(l);N_GUARD::R(F),XS(l)
- S(l);N_GUARD::R(F)
- P(d);N_PINQ(C)::QAB1(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).