MESON Chess Problem Database
Problem Display
PID: 230828 (B1Nr2b1/2P5/PQ3p2/p1n5/1pk3N1/q3R1BK/PP1R4/8 w - - 0 1)
Laaksonen, Hellmuth
Stella Polaris, 1968
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxe3
- 2.Sxe3#
- 1...Rd6
- 2.Sxd6#
- 1...Re8
- 2.Sd6#
- 1...Rf8
- 2.Sd6#
- 1...Sb3
- 2.Rc2#
- 1...Sd7
- 2.Sd6#
- 2.Rd4#
- 2.Re4#
- 1...b3
- 2.Rc3#
- 1...f5
- 2.Se5#
- 1...Qxe3
- Tries
- 1.Rc2+?
- 1...Kd4
- 2.Qxc5#
- 2.Qxf6#
- 1...Qc3!
- 1...Kd4
- 1.Rc3+?
- 1...bxc3
- 2.Se3#
- 1...Qxc3!
- 1...bxc3
- 1.Re4+?
- 1...Rd4
- 2.Sd6#
- 2.Rdxd4#
- 2.Rexd4#
- 1...Sxe4!
- 1...Rd4
- 1.b3+?
- 1...Sxb3
- 2.Rc2#
- 1...Qxb3!
- 1...Sxb3
- 1.cxd8Q?
- threat
- 2.Sd6#
- 2.Rd4#
- 2.Qd4#
- 1...Qxb2
- 2.Sd6#
- 1...Qxe3
- 2.Sxe3#
- 2.Sd6#
- 1...Qc3
- 2.Sd6#
- 1...Bd5
- 2.Sd6#
- 2.Bxd5#
- 2.Qxd5#
- 1...Sb3
- 2.Sd6#
- 2.Rc2#
- 2.Qd3#
- 2.Qxg8#
- 1...Sd3
- 2.Sd6#
- 2.Re4#
- 2.Qdd4#
- 2.Qxg8#
- 1...Se4
- 2.Rd4#
- 2.Rxe4#
- 2.Qdd4#
- 2.Qxg8#
- 1...Se6
- 2.Sd6#
- 2.Bd5#
- 2.Qd5#
- 1...Sb7
- 2.Rd4#
- 2.Re4#
- 2.Qdd4#
- 2.Qxg8#
- 1...Sd7
- 2.Sd6#
- 2.Rd4#
- 2.Re4#
- 2.Qxg8#
- 1...Qd3!
- threat
- 1.cxd8S?
- threat
- 2.Sd6#
- 1...Se4
- 2.Rd4#
- 2.Rxe4#
- 1...Sb7
- 2.Rd4#
- 2.Re4#
- 1...Qd3!
- threat
- 1.cxd8B?
- threat
- 2.Sd6#
- 1...Se4
- 2.Rd4#
- 2.Rxe4#
- 1...Sb7
- 2.Rd4#
- 2.Re4#
- 1...Qd3!
- threat
- 1.cxd8R?
- threat
- 2.Sd6#
- 2.R2d4#
- 2.R8d4#
- 1...Qxb2
- 2.Sd6#
- 1...Qxe3
- 2.Sxe3#
- 2.Sd6#
- 1...Qc3
- 2.Sd6#
- 1...Bd5
- 2.Sd6#
- 2.Bxd5#
- 1...Sb3
- 2.Sd6#
- 2.Rc2#
- 1...Sd3
- 2.Sd6#
- 2.Re4#
- 2.Rd4#
- 1...Se4
- 2.R2d4#
- 2.Rxe4#
- 2.R8d4#
- 1...Se6
- 2.Sd6#
- 2.Bd5#
- 1...Sb7
- 2.R2d4#
- 2.Re4#
- 2.R8d4#
- 1...Sd7
- 2.Sd6#
- 2.Rd4#
- 2.Re4#
- 1...Qd3!
- threat
- 1.Rc2+?
- Keys
- 1.Bd6!
- threat
- 2.Qxc5#
- 1...Qxe3+
- 2.Sxe3#
- 1...Rxd6
- 2.Sxd6#
- 1...Sxa6
- 2.Rd4#
- 2.Qxa6#
- 1...Sb3
- 2.Rc2#
- 1...Sd3
- 2.Re4#
- 1...Sa4
- 2.Rd4#
- 1...Se4
- 2.Rd4#
- 1...Se6
- 2.Bd5#
- 1...Sb7
- 2.Rd4#
- 1...Sd7
- 2.Rd4#
- 1...b3
- 2.Rc3#
- threat
- 1.Bd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 3
- Sets
- Q(a);P_PINB(E),XR(D)::S(G),XQ(a)
- R(g);N_GUARD::S(L),XR(g)
- R(g);N_GUARD::S(L)
- S(e);S_CUTQ(a)::R(C)
- P(b);N_GUARD,S_CUTQ(a)::R1(D)
- P(f);N_GUARD::S(G)
- Tries
- Try
- R(C);CHECK
- Refutation
- Q(a);P_SPINQ(a)
- Try
- R(D);CHECK
- Vars
- P(b);XR(D)::S(G)
- Refutation
- Q(a);P_PINB(E),XR(D)
- Try
- R(D);CHECK,P_SPINB(E)
- Refutation
- S(e);XR(D)
- Try
- P(B);CHECK
- Vars
- S(e);XP(B)::R(C)
- Refutation
- Q(a);XP(B)
- Try
- P(J);XR(g)
- Threat
- DUALS(3)
- Vars
- Q(a);XP(B)::S(L)
- Q(a);::S(L)
- Refutation
- Q(a);
- Try
- P(J);XR(g)
- Threat
- S(L)
- Refutation
- Q(a);
- Try
- P(J);XR(g)
- Threat
- S(L)
- Refutation
- Q(a);
- Try
- P(J);XR(g)
- Threat
- DUALS(3)
- Vars
- Q(a);XP(B)::S(L)
- Q(a);::S(L)
- Refutation
- Q(a);
- Try
- Actual
- B(E);P_SPINR(D)
- Threat
- QAR1(I),XS(e)
- Vars
- Q(a);CHECK,XR(D)::S(G),XQ(a)
- R(g);XB(E)::S(L),XR(g)
- S(e);N_PINR(D),S_CUTQ(a)::R(C)
- S(e);N_PINR(D)::R(D)
- S(e);::R1(C)
- S(e);S_CUTB(h)::B(K)
- P(b);N_GUARD,N_PINR(D),S_CUTQ(a)::R1(D)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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