MESON Chess Problem Database
Problem Display
PID: 42049 (4R2q/1p6/1Kp1Q3/3BN1B1/3k1N2/1prppR2/1Pb3r1/8 w - - 0 1)
Barnes, Barry Peter
Stella Polaris, 1971
#2
9 + 10
| 4199 | Barnes about Chess Problems | 2001 |
SOLUTION
- SOUND
- Sets
- 1...Qxe5
- 2.Qxe5#
- 1...cxd5
- 2.Qxd5#
- 1...Qxe5
- Tries
- 1.Se2+?
- 1...Rxe2
- 2.Rf4#
- 1...dxe2!
- 1...Rxe2
- 1.Sxg2?
- threat
- 2.Bxe3#
- 2.Rf4#
- 1...Qxe5
- 2.Qxe5#
- 1...cxd5
- 2.Rf4#
- 2.Qg4#
- 1...Qf6
- 2.Bxe3#
- 1...Qh2
- 2.Bxe3#
- 1...Qh4
- 2.Bxe3#
- 1...Qh6
- 2.Rf4#
- 1...Qh7
- 2.Bxe3#
- 1...Qf8
- 2.Bxe3#
- 1...e2
- 2.Be3#
- 2.Rf4#
- 1...d2!
- threat
- 1.Sfxd3?
- threat
- 2.Bxe3#
- 2.Rf4#
- 1...Rxg5
- 2.Rf4#
- 1...Rxd3
- 2.Rf4#
- 1...Bxd3
- 2.Bxe3#
- 1...cxd5
- 2.Rf4#
- 1...Qf6
- 2.Bxe3#
- 1...Qh2
- 2.Bxe3#
- 1...Qh4
- 2.Bxe3#
- 1...Qh6
- 2.Rf4#
- 1...Qh7
- 2.Bxe3#
- 1...Qf8
- 2.Bxe3#
- 1...Re2
- 2.Rf4#
- 1...Rf2
- 2.Bxe3#
- 1...Rg4
- 2.Bxe3#
- 1...e2
- 2.Be3#
- 1...Qxe5!
- threat
- 1.Sh3?
- threat
- 2.Bxe3#
- 2.Rf4#
- 1...Qxe5
- 2.Qxe5#
- 1...Rxg5
- 2.Rf4#
- 1...cxd5
- 2.Rf4#
- 1...Qf6
- 2.Bxe3#
- 1...Qh4
- 2.Bxe3#
- 1...Qh6
- 2.Rf4#
- 1...Qh7
- 2.Bxe3#
- 1...Qf8
- 2.Bxe3#
- 1...Re2
- 2.Rf4#
- 1...Rf2
- 2.Bxe3#
- 1...Rg4
- 2.Bxe3#
- 1...e2
- 2.Be3#
- 1...d2!
- threat
- 1.Sh5?
- threat
- 2.Bxe3#
- 2.Rf4#
- 1...Qxe5
- 2.Qxe5#
- 1...Rxg5
- 2.Rf4#
- 1...cxd5
- 2.Rf4#
- 1...Qf6
- 2.Bxe3#
- 1...Qh6
- 2.Rf4#
- 1...Qh7
- 2.Bxe3#
- 1...Qf8
- 2.Bxe3#
- 1...Re2
- 2.Rf4#
- 1...Rf2
- 2.Bxe3#
- 1...Rg4
- 2.Bxe3#
- 1...e2
- 2.Be3#
- 1...d2!
- threat
- 1.Sfg6?
- threat
- 2.Bxe3#
- 2.Rf4#
- 1...Qxe5
- 2.Qxe5#
- 1...Rxg5
- 2.Rf4#
- 1...cxd5
- 2.Rf4#
- 1...Qf6
- 2.Bxe3#
- 1...Qh2
- 2.Bxe3#
- 1...Qh4
- 2.Bxe3#
- 1...Qh6
- 2.Rf4#
- 1...Qf8
- 2.Bxe3#
- 1...Re2
- 2.Rf4#
- 1...Rf2
- 2.Bxe3#
- 1...Rg4
- 2.Bxe3#
- 1...e2
- 2.Be3#
- 1...d2!
- threat
- 1.Sc4?
- threat
- 2.Qxe3#
- 2.Qe4#
- 1...Qxe8
- 2.Bf6#
- 1...cxd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qh7
- 2.Bf6#
- 2.Qxe3#
- 2.Qe5#
- 2.Qf6#
- 1...Re2
- 2.Qe4#
- 1...e2
- 2.Qe3#
- 2.Qe4#
- 1...d2!
- threat
- 1.Sg4?
- threat
- 2.Qxe3#
- 2.Qe4#
- 1...Qxe8
- 2.Bf6#
- 1...cxd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qh7
- 2.Bf6#
- 2.Qxe3#
- 2.Qe5#
- 2.Qf6#
- 1...Re2
- 2.Qe4#
- 1...e2
- 2.Qe3#
- 2.Qe4#
- 1...d2!
- threat
- 1.Sxc6+?
- 1...bxc6
- 2.Qxe3#
- 2.Qe4#
- 1...Rxc6+!
- 1...bxc6
- 1.Seg6?
- threat
- 2.Qxe3#
- 2.Qe4#
- 1...Qxe8
- 2.Bf6#
- 1...cxd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Re2
- 2.Qe4#
- 1...e2
- 2.Qe3#
- 2.Qe4#
- 1...d2!
- threat
- 1.Sd7?
- threat
- 2.Qxe3#
- 2.Qe4#
- 1...Qxe8
- 2.Bf6#
- 1...cxd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qh7
- 2.Bf6#
- 2.Qxe3#
- 2.Qe5#
- 2.Qf6#
- 1...Re2
- 2.Qe4#
- 1...e2
- 2.Qe3#
- 2.Qe4#
- 1...d2!
- threat
- 1.Sf7?
- threat
- 2.Qxe3#
- 2.Qe4#
- 1...Qxe8
- 2.Bf6#
- 1...cxd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qh7
- 2.Bf6#
- 2.Qxe3#
- 2.Qe5#
- 2.Qf6#
- 1...Re2
- 2.Qe4#
- 1...e2
- 2.Qe3#
- 2.Qe4#
- 1...d2!
- threat
- 1.Bf6?
- threat
- 2.Sxc6#
- 1...cxd5
- 2.Qxd5#
- 1...c5
- 2.Sc6#
- 1...Qxf6!
- threat
- 1.Se2+?
- Keys
- 1.Sexd3!
- threat
- 2.Qxe3#
- 2.Qe4#
- 1...Qxe8
- 2.Bf6#
- 1...Rxd3
- 2.Qe4#
- 1...Bxd3
- 2.Qxe3#
- 1...cxd5
- 2.Qxd5#
- 1...Qe5
- 2.Qxe5#
- 1...Qh7
- 2.Bf6#
- 2.Qxe3#
- 2.Qe5#
- 2.Qf6#
- 1...Re2
- 2.Qe4#
- 1...e2
- 2.Qe3#
- 2.Qe4#
- threat
- 1.Sexd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- Q(j);OGATE,XS(E)::QAB1(H),XQ(j)
- P(h);OGATE,XB(D)::QAR1(H),XP(h)
- Tries
- Try
- S(C);CHECK
- Vars
- R(b);XS(C)::R(B)
- Refutation
- P(e);XS(C)
- Try
- S(C);XR(b)
- Threat
- DUALS(2)
- Vars
- Q(j);OGATE,XS(E)::QAB1(H),XQ(j)
- Q(j);::B(F),XP(f)
- Q(j);::R(B)
- Refutation
- P(e);
- Try
- S(C);XP(e)
- Threat
- DUALS(2)
- Vars
- R(b);XB(F)::R(B)
- R(d);XS(C)::R(B)
- B(a);XS(C)::B(F),XP(f)
- P(h);XB(D)::R(B)
- Q(j);::B(F),XP(f)
- Q(j);::R(B)
- R(b);::R(B)
- R(b);::B(F),XP(f)
- P(f);::B(F)
- Refutation
- Q(j);XS(E)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(j);OGATE,XS(E)::QAB1(H),XQ(j)
- R(b);XB(F)::R(B)
- P(h);XB(D)::R(B)
- Q(j);::B(F),XP(f)
- Q(j);::R(B)
- R(b);::R(B)
- R(b);::B(F),XP(f)
- P(f);::B(F)
- Refutation
- P(e);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(j);OGATE,XS(E)::QAB1(H),XQ(j)
- R(b);XB(F)::R(B)
- P(h);XB(D)::R(B)
- Q(j);::B(F),XP(f)
- Q(j);::R(B)
- R(b);::R(B)
- R(b);::B(F),XP(f)
- P(f);::B(F)
- Refutation
- P(e);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- Q(j);OGATE,XS(E)::QAB1(H),XQ(j)
- R(b);XB(F)::R(B)
- P(h);XB(D)::R(B)
- Q(j);::B(F),XP(f)
- Q(j);::R(B)
- R(b);::R(B)
- R(b);::B(F),XP(f)
- P(f);::B(F)
- Refutation
- P(e);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(j);N_GUARD,XR(I)::B(F)
- P(h);OGATE,XB(D)::QAR1(H),XP(h)
- Q(j);N_GUARD::QAB1(H),XQ(j)
- R(b);::QAR1(H)
- Refutation
- P(e);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(j);N_GUARD,XR(I)::B(F)
- P(h);OGATE,XB(D)::QAR1(H),XP(h)
- Q(j);N_GUARD::QAB1(H),XQ(j)
- R(b);::QAR1(H)
- Refutation
- P(e);
- Try
- S(E);CHECK,XP(h)
- Refutation
- R(d);CHECK,XS(E)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(j);N_GUARD,XR(I)::B(F)
- P(h);OGATE,XB(D)::QAR1(H),XP(h)
- Q(j);N_GUARD::QAB1(H),XQ(j)
- R(b);::QAR1(H)
- Refutation
- P(e);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(j);N_GUARD,XR(I)::B(F)
- P(h);OGATE,XB(D)::QAR1(H),XP(h)
- Q(j);N_GUARD::QAB1(H),XQ(j)
- R(b);::QAR1(H)
- Refutation
- P(e);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(j);N_GUARD,XR(I)::B(F)
- P(h);OGATE,XB(D)::QAR1(H),XP(h)
- Q(j);N_GUARD::QAB1(H),XQ(j)
- R(b);::QAR1(H)
- Refutation
- P(e);
- Try
- B(F);
- Threat
- B(F)+S(E),DCHECK,XP(h)
- Vars
- P(h);OGATE,XB(D)::QAR1(H),XP(h)
- P(h);::B(F)+S(E),DCHECK
- Refutation
- Q(j);XB(F)
- Try
- Actual
- S(E);XP(e)
- Threat
- DUALS(2)
- Vars
- Q(j);N_GUARD,XR(I)::B(F)
- R(d);XS(E)::QAR1(H)
- B(a);XS(E)::QAB1(H),XP(f)
- P(h);OGATE,XB(D)::QAR1(H),XP(h)
- Q(j);N_GUARD::QAB1(H),XQ(j)
- R(b);::QAR1(H)
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).