MESON Chess Problem Database
Problem Display
PID: 213010 (3R2bK/2N4p/Q4r1r/2N1k3/p3BR2/4P1P1/4p3/3q4 w - - 0 1)
Larsen, Lars Aksglade (= Aksglade, Lars)
Stella Polaris, 1967
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Sd7#
- 1...Qb3
- 2.Sd7#
- 1...Qa1
- 2.Sd3#
- 2.Sd7#
- 1...Qb1
- 2.Sd7#
- 1...Qc1
- 2.Sd3#
- 2.Sd7#
- 1...Qe1
- 2.Sd3#
- 2.Sd7#
- 1...Qf1
- 2.Sd3#
- 2.Sd7#
- 1...Qg1
- 2.Sd3#
- 2.Sd7#
- 1...Qh1
- 2.Sd3#
- 2.Sd7#
- 1...Qd3
- 2.Sxd3#
- 1...Qd4
- 2.exd4#
- 1...Qd7
- 2.Sxd7#
- 1...Rxf4
- 2.exf4#
- 2.gxf4#
- 1...Rf5
- 2.Rxf5#
- 1...Rxa6
- 2.Rf5#
- 1...Rb6
- 2.Rf5#
- 1...Rc6
- 2.Rf5#
- 1...Rd6
- 2.Rf5#
- 1...Re6
- 2.Rf5#
- 1...Rfg6
- 2.Rf5#
- 1...Rh1
- 2.Qxf6#
- 1...Rh2
- 2.Qxf6#
- 1...Rh3
- 2.Qxf6#
- 1...Rh4
- 2.Qxf6#
- 1...Rh5
- 2.Qxf6#
- 1...Bd5
- 2.Sd7#
- 1...Qc2
- Tries
- 1.Rd2?
- threat
- 2.Sd3#
- 2.Sd7#
- 1...Rxf4
- 2.exf4#
- 2.gxf4#
- 1...Rxa6
- 2.Sd7#
- 2.Rf5#
- 1...e1S
- 2.Sd7#
- 1...Qc2
- 2.Sd7#
- 1...Qb3
- 2.Sd7#
- 1...Qb1
- 2.Sd7#
- 1...Rb6
- 2.Sd7#
- 2.Rf5#
- 1...Rc6
- 2.Sd7#
- 2.Rf5#
- 1...Rd6
- 2.Rf5#
- 1...Rf7
- 2.Sd3#
- 1...Bc4
- 2.Sd7#
- 1...Be6
- 2.Sd3#
- 2.Qd6#
- 1...Qxd2!
- threat
- 1.Rd3?
- threat
- 2.Sd7#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxf4
- 2.exf4#
- 2.gxf4#
- 1...Rd6
- 2.Rf5#
- 1...Be6
- 2.Qd6#
- 1...Rf7!
- threat
- 1.Rd5+?
- 1...Bxd5
- 2.Sd7#
- 1...Qxd5!
- 1...Bxd5
- 1.Re8+?
- 1...Re6
- 2.Rf5#
- 1...Be6!
- 1...Re6
- 1.Qd3?
- threat
- 2.Sd7#
- 1...Qxd3
- 2.Sxd3#
- 1...Rd6
- 2.Rf5#
- 1...Rf7
- 2.Rd5#
- 1...Bd5
- 2.Rxd5#
- 1...Be6!
- threat
- 1.Qd6+?
- 1...Rxd6
- 2.Rf5#
- 1...Qxd6!
- 1...Rxd6
- 1.Qe6+?
- 1...Rxe6
- 2.Rf5#
- 1...Bxe6!
- 1...Rxe6
- 1.Rd2?
- Keys
- 1.Bd3!
- threat
- 2.Sd7#
- 1...Qxd3
- 2.Sxd3#
- 1...Rxa6
- 2.Rf5#
- 1...Rb6
- 2.Rf5#
- 1...Rc6
- 2.Rf5#
- 1...Rd6
- 2.Rf5#
- 1...Rf7
- 2.Rd5#
- 1...Be6
- 2.Qd6#
- threat
- 1.Bd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 14
- Sets
- Q(a);N_GUARD::S(E)
- Q(a);N_GUARD::S(E),XQ(a)
- Q(a);OGATE::P(A),XQ(a)
- R(e);N_GUARD::R1(D),XR(e)
- R(e);N_GUARD,XQ(F)::R1(D)
- R(e);N_GUARD::R1(D)
- R(f);N_GUARD::QAB1(F),XR(e)
- B(h);S_CUTQ(a)::S(E)
- Tries
- Try
- R(H);
- Threat
- DUALS(2)
- Vars
- P(b);::S(E)
- Q(a);::S(E)
- R(e);N_GUARD::R1(D)
- R(e);::S(E)
- B(h);::S(E)
- Refutation
- Q(a);XR(H)
- Try
- R(H);
- Threat
- S(E)
- Vars
- Q(a);XR(H)::S(E),XQ(a)
- R(e);N_GUARD::R1(D)
- B(h);S_CUTR(e)::QAB1(F)
- Refutation
- R(e);
- Try
- R(H);CHECK
- Vars
- B(h);XR(H)::S(E)
- Refutation
- Q(a);XR(H)
- Try
- R(H);CHECK
- Vars
- R(e);P_SPINR(e)::R1(D)
- Refutation
- B(h);P_SPINB(h)
- Try
- Q(F);
- Threat
- S(E)
- Vars
- Q(a);XQ(F)::S(E),XQ(a)
- R(e);N_GUARD::R1(D)
- R(e);S_CUTB(h)::R1(H)
- B(h);N_GUARD::R1(H),XB(h)
- Refutation
- B(h);
- Try
- Q(F);CHECK
- Vars
- R(e);XQ(F)::R1(D)
- Refutation
- Q(a);XQ(F)
- Try
- Q(F);CHECK
- Vars
- R(e);XQ(F)::R1(D)
- Refutation
- B(h);XQ(F)
- Try
- Actual
- B(C);
- Threat
- S(E)
- Vars
- Q(a);XB(C)::S(E),XQ(a)
- R(e);N_GUARD,XQ(F)::R1(D)
- R(e);N_GUARD::R1(D)
- R(e);S_CUTB(h)::R1(H)
- B(h);S_CUTR(e)::QAB1(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).