MESON Chess Problem Database
Problem Display
PID: 110694 (2bn3K/5p2/1N2p3/1p2k1Nn/4p2B/6P1/2BR4/5Q2 w - - 0 1)
Jonsson, Gustav
Israel Ring Ty., 1959-1960
#2
8 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sxg3
- 2.Bxg3#
- 1...Sf4
- 2.Qxf4#
- 1...Sf6
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Sc6
- 2.Sxf7#
- 1...Sb7
- 2.Sxf7#
- 1...e3
- 2.Sf3#
- 2.Qa1#
- 1...b4
- 2.Sc4#
- 1...f5
- 2.Qa1#
- 1...f6
- 2.Qxb5#
- 1...Ba6
- Tries
- 1.Kh7?
- 1...Sxg3
- 2.Bxg3#
- 1...Sf4
- 2.Qxf4#
- 1...f5
- 2.Qa1#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sg7
- 2.Qf4#
- 1...Sc6
- 2.Sxf7#
- 1...Sb7
- 2.Sxf7#
- 1...e3
- 2.Sf3#
- 2.Qa1#
- 1...b4
- 2.Sc4#
- 1...f6
- 2.Qxb5#
- 1...Sf6+!
- 1...Sxg3
- 1.Kg8?
- 1...Sxg3
- 2.Bxg3#
- 1...Sf4
- 2.Qxf4#
- 1...f5
- 2.Qa1#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sg7
- 2.Qf4#
- 1...Sc6
- 2.Sxf7#
- 1...Sb7
- 2.Sxf7#
- 1...e3
- 2.Sf3#
- 2.Qa1#
- 1...b4
- 2.Sc4#
- 1...f6
- 2.Qxb5#
- 1...Sf6+!
- 1...Sxg3
- 1.Sf3+?
- 1...exf3
- 2.Qxb5#
- 2.Qa1#
- 2.Qe1#
- 1...Kf5!
- 1...exf3
- 1.Sh3?
- threat
- 2.Qxb5#
- 1...Sf4
- 2.Qxf4#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sf6
- 2.Bxf6#
- 2.Qf4#
- 2.Qxf6#
- 1...b4
- 2.Sc4#
- 2.Qb5#
- 1...Sb7!
- threat
- 1.Sxe4?
- threat
- 2.Qxb5#
- 1...Sxg3
- 2.Bxg3#
- 2.Bf6#
- 2.Qf6#
- 1...Sf4
- 2.Qxf4#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sf6
- 2.Bxf6#
- 2.Qf4#
- 2.Qxf6#
- 1...b4
- 2.Sc4#
- 2.Qb5#
- 1...Sb7!
- threat
- 1.Sh7?
- threat
- 2.Qxb5#
- 1...Sxg3
- 2.Bxg3#
- 2.Bf6#
- 2.Qf6#
- 1...Sf4
- 2.Qxf4#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sf6
- 2.Bxf6#
- 2.Qf4#
- 2.Qxf6#
- 1...b4
- 2.Sc4#
- 2.Qb5#
- 1...Sb7!
- threat
- 1.Sxc8?
- 1...Sxg3
- 2.Bxg3#
- 1...Sf4
- 2.Qxf4#
- 1...f5
- 2.Qa1#
- 1...Sb7
- 2.Sxf7#
- 1...Sf6
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Sc6
- 2.Sxf7#
- 1...e3
- 2.Sf3#
- 2.Qa1#
- 1...f6
- 2.Qxb5#
- 1...b4!
- 1...Sxg3
- 1.Bb1?
- 1...Sxg3
- 2.Bxg3#
- 1...Sf4
- 2.Qxf4#
- 1...Sb7
- 2.Sxf7#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sf6
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Sc6
- 2.Sxf7#
- 1...e3
- 2.Sf3#
- 1...b4
- 2.Sc4#
- 1...f6
- 2.Qxb5#
- 1...f5!
- 1...Sxg3
- 1.Bb3?
- 1...Sxg3
- 2.Bxg3#
- 1...Sf4
- 2.Qxf4#
- 1...f5
- 2.Qa1#
- 1...Sb7
- 2.Sxf7#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sf6
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Sc6
- 2.Sxf7#
- 1...b4
- 2.Sc4#
- 1...f6
- 2.Qxb5#
- 1...e3!
- 1...Sxg3
- 1.Ba4?
- 1...Sxg3
- 2.Bxg3#
- 1...bxa4
- 2.Sc4#
- 1...Sf4
- 2.Qxf4#
- 1...f5
- 2.Qa1#
- 1...Sb7
- 2.Sxf7#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sf6
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Sc6
- 2.Sxf7#
- 1...b4
- 2.Sc4#
- 1...f6
- 2.Qxb5#
- 1...e3!
- 1...Sxg3
- 1.Bxe4?
- threat
- 2.Qa1#
- 1...Sxg3
- 2.Bxg3#
- 1...Sc6!
- threat
- 1.Rd1?
- 1...Sxg3
- 2.Bxg3#
- 1...Sf4
- 2.Qxf4#
- 1...Sb7
- 2.Sxf7#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sf6
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Sc6
- 2.Sxf7#
- 1...e3
- 2.Sf3#
- 1...b4
- 2.Sc4#
- 1...f6
- 2.Qxb5#
- 1...f5!
- 1...Sxg3
- 1.Rxd8?
- threat
- 2.Sxf7#
- 1...Sf4
- 2.Qxf4#
- 1...f5
- 2.Sf7#
- 2.Qa1#
- 1...f6
- 2.Sf7#
- 2.Qxb5#
- 1...Bd7!
- threat
- 1.Qf3?
- 1...Sxg3
- 2.Bxg3#
- 1...exf3
- 2.Sxf3#
- 1...Sf4
- 2.Qxf4#
- 1...f5
- 2.Qc3#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sf6
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Sc6
- 2.Sxf7#
- 1...Sb7
- 2.Sxf7#
- 1...b4
- 2.Sc4#
- 1...f6
- 2.Qxe4#
- 1...e3!
- 1...Sxg3
- 1.Kh7?
- Keys
- 1.Qf2!
- 1...Sxg3
- 2.Bxg3#
- 1...Sf4
- 2.Qxf4#
- 1...f5
- 2.Qd4#
- 1...e3
- 2.Sf3#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sf6
- 2.Qf4#
- 1...Sg7
- 2.Qf4#
- 1...Sc6
- 2.Sxf7#
- 1...Sb7
- 2.Sxf7#
- 1...b4
- 2.Sc4#
- 1...f6
- 2.Qc5#
- 1...Sxg3
- 1.Qf2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- S(d);OGATE,XP(D)::B(E),XS(d)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(d);N_GUARD::QAB1(A)
- S(h);N_GUARD::S(F),XP(f)
- P(b);N_GUARD::S(G)
- P(f);SBLOCK::QAB(A)
- P(f);SBLOCK::QAR(A),XP(b)
- Tries
- Try
- K(H);P-FLIGHT
- Vars
- S(d);OGATE,XP(D)::B(E),XS(d)
- S(d);N_GUARD::QAB1(A),XS(d)
- P(f);SBLOCK::QAB(A)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- S(d);N_GUARD::QAB1(A)
- S(h);N_GUARD::S(F),XP(f)
- P(b);N_GUARD::S(G)
- P(f);SBLOCK::QAR(A),XP(b)
- Refutation
- S(d);CHECK
- Try
- K(H);P-FLIGHT
- Vars
- S(d);OGATE,XP(D)::B(E),XS(d)
- S(d);N_GUARD::QAB1(A),XS(d)
- P(f);SBLOCK::QAB(A)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- S(d);N_GUARD::QAB1(A)
- S(h);N_GUARD::S(F),XP(f)
- P(b);N_GUARD::S(G)
- P(f);SBLOCK::QAR(A),XP(b)
- Refutation
- S(d);CHECK
- Try
- S(F);CHECK
- Refutation
- K(c);P-FLIGHT,P_SPINP(a)
- Try
- S(F);
- Threat
- QAR(A),XP(b)
- Vars
- S(d);N_GUARD::QAB1(A),XS(d)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- Refutation
- S(h);
- Try
- S(F);XP(a)
- Threat
- QAR(A),XP(b)
- Vars
- S(d);N_GUARD::QAB1(A),XS(d)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- Refutation
- S(h);
- Try
- S(F);
- Threat
- QAR(A),XP(b)
- Vars
- S(d);N_GUARD::QAB1(A),XS(d)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- Refutation
- S(h);
- Try
- S(G);XB(g)
- Vars
- S(d);OGATE,XP(D)::B(E),XS(d)
- S(d);N_GUARD::QAB1(A),XS(d)
- P(f);SBLOCK::QAB(A)
- S(h);N_GUARD::S(F),XP(f)
- S(d);N_GUARD::QAB1(A)
- P(f);SBLOCK::QAR(A),XP(b)
- Refutation
- P(b);
- Try
- B(B);
- Vars
- S(d);OGATE,XP(D)::B(E),XS(d)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(h);N_GUARD::S(F),XP(f)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- S(d);N_GUARD::QAB1(A)
- P(a);N_GUARD::S(F)
- P(b);N_GUARD::S(G)
- P(f);SBLOCK::QAR(A),XP(b)
- Refutation
- P(f);
- Try
- B(B);
- Vars
- S(d);OGATE,XP(D)::B(E),XS(d)
- S(d);N_GUARD::QAB1(A),XS(d)
- P(f);SBLOCK::QAB(A)
- S(h);N_GUARD::S(F),XP(f)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- S(d);N_GUARD::QAB1(A)
- P(b);N_GUARD::S(G)
- P(f);SBLOCK::QAR(A),XP(b)
- Refutation
- P(a);
- Try
- B(B);
- Vars
- S(d);OGATE,XP(D)::B(E),XS(d)
- P(b);N_GUARD,XB(B)::S(G)
- S(d);N_GUARD::QAB1(A),XS(d)
- P(f);SBLOCK::QAB(A)
- S(h);N_GUARD::S(F),XP(f)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- S(d);N_GUARD::QAB1(A)
- P(b);N_GUARD::S(G)
- P(f);SBLOCK::QAR(A),XP(b)
- Refutation
- P(a);
- Try
- B(B);XP(a)
- Threat
- QAB(A)
- Vars
- S(d);OGATE,XP(D)::B(E),XS(d)
- Refutation
- S(h);
- Try
- R(C);
- Vars
- S(d);OGATE,XP(D)::B(E),XS(d)
- S(d);N_GUARD::QAB1(A),XS(d)
- S(h);N_GUARD::S(F),XP(f)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- S(d);N_GUARD::QAB1(A)
- P(a);N_GUARD::S(F)
- P(b);N_GUARD::S(G)
- P(f);SBLOCK::QAR(A),XP(b)
- Refutation
- P(f);
- Try
- R(C);XS(h)
- Threat
- S(F),XP(f)
- Vars
- S(d);N_GUARD::QAB1(A),XS(d)
- Refutation
- B(g);
- Try
- Q(A);
- Vars
- S(d);OGATE,XP(D)::B(E),XS(d)
- P(a);XQ(A)::S(F),XP(a)
- S(d);N_GUARD::QAB1(A),XS(d)
- P(f);SBLOCK::QAB(A)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- S(d);N_GUARD::QAB1(A)
- S(h);N_GUARD::S(F),XP(f)
- P(b);N_GUARD::S(G)
- P(f);SBLOCK::QAR1(A),XP(a)
- Refutation
- P(a);
- Try
- Actual
- Q(A);
- Vars
- S(d);OGATE,XP(D)::B(E),XS(d)
- S(d);N_GUARD::QAB1(A),XS(d)
- P(f);SBLOCK::QAB1(A)
- P(a);N_GUARD::S(F)
- B(g);N_GUARD::S(G)
- B(g);N_GUARD::S(G),XB(g)
- S(d);N_GUARD::QAB1(A)
- S(h);N_GUARD::S(F),XP(f)
- P(b);N_GUARD::S(G)
- P(f);SBLOCK::QAR2(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).