MESON Chess Problem Database
Problem Display
PID: 278234 (bbR2B1K/3B1Q1n/r3n3/2PpkpN1/8/2NRp1P1/8/5q2 w - - 0 1)
Wirtanen, Erkki Aukusti
Stella Polaris, 1972
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxd3
- 2.Sf3#
- 1...Qh3
- 2.Sf3#
- 1...Qa1
- 2.Sf3#
- 1...Qb1
- 2.Sf3#
- 1...Qc1
- 2.Sf3#
- 1...Qe1
- 2.Sf3#
- 1...Qg1
- 2.Sf3#
- 1...Qf3
- 2.Sxf3#
- 1...Ra1
- 2.Qxe6#
- 1...Ra2
- 2.Qxe6#
- 1...Ra3
- 2.Qxe6#
- 1...Ra4
- 2.Qxe6#
- 1...Ra5
- 2.Qxe6#
- 1...Rc6
- 2.Rxd5#
- 1...Ra7
- 2.Qxe6#
- 1...Bc6
- 2.Qxe6#
- 1...Bd6
- 2.Qxe6#
- 1...Sd4
- 2.Rxe3#
- 1...Sf4
- 2.Qxf5#
- 1...Qxd3
- Tries
- 1.Bc6?
- threat
- 2.Rxd5#
- 2.Qxe6#
- 1...Qxd3
- 2.Sf3#
- 1...Rxc6
- 2.Rxd5#
- 1...Bxc6
- 2.Qxe6#
- 1...Sxc5
- 2.Rxd5#
- 1...Sexg5
- 2.Rxd5#
- 1...Sexf8
- 2.Rxd5#
- 1...Shxg5
- 2.Rxd5#
- 1...Shxf8
- 2.Rxd5#
- 1...Qg2
- 2.Qxe6#
- 1...Qd1
- 2.Qxe6#
- 1...Qh1
- 2.Qxe6#
- 1...Qf3
- 2.Sxf3#
- 2.Qxe6#
- 1...Sd4
- 2.Rxe3#
- 1...Sc7
- 2.Bd6#
- 1...Sg7
- 2.Rxd5#
- 1...Sd8
- 2.Rxd5#
- 1...Sf6
- 2.Qxe6#
- 1...d4
- 2.Qxe6#
- 1...Sf4!
- threat
- 1.Bd6+?
- 1...Bxd6
- 2.Qxe6#
- 1...Rxd6!
- 1...Bxd6
- 1.Bg7+?
- 1...Sf6
- 2.Bxf6#
- 2.Qxf6#
- 1...Sxg7!
- 1...Sf6
- 1.Qf6+?
- 1...Sxf6
- 2.Sf7#
- 1...Kxf6!
- 1...Sxf6
- 1.Qe7?
- threat
- 2.Sf7#
- 1...Qxd3
- 2.Sf3#
- 1...Sxg5
- 2.Bg7#
- 1...f4!
- threat
- 1.Qg7+?
- 1...Sf6
- 2.Sf7#
- 1...Sxg7!
- 1...Sf6
- 1.c6?
- threat
- 2.Rxd5#
- 2.Qxe6#
- 1...Qxd3
- 2.Sf3#
- 1...Rxc6
- 2.Rxd5#
- 1...Bxc6
- 2.Qxe6#
- 1...Sexg5
- 2.Rxd5#
- 1...Sexf8
- 2.Rxd5#
- 1...Shxg5
- 2.Rxd5#
- 1...Shxf8
- 2.Rxd5#
- 1...Qg2
- 2.Qxe6#
- 1...Qd1
- 2.Qxe6#
- 1...Qh1
- 2.Qxe6#
- 1...Qf3
- 2.Sxf3#
- 2.Qxe6#
- 1...Ra5
- 2.Qxe6#
- 1...Sd4
- 2.Rxe3#
- 1...Sf4
- 2.Qxf5#
- 1...Sc5
- 2.Rxd5#
- 1...Sg7
- 2.Rxd5#
- 1...Sd8
- 2.Rxd5#
- 1...Sf6
- 2.Qxe6#
- 1...d4
- 2.Qxe6#
- 1...Sc7!
- threat
- 1.Bc6?
- Keys
- 1.Rc6!
- threat
- 2.Rxd5#
- 2.Qxe6#
- 1...Qxd3
- 2.Sf3#
- 1...Rxc6
- 2.Rxd5#
- 1...Bxc6
- 2.Qxe6#
- 1...Sxc5
- 2.Rxd5#
- 2.Qxd5#
- 1...Sexg5
- 2.Rxd5#
- 2.Qxd5#
- 1...Sexf8
- 2.Rxd5#
- 2.Qxd5#
- 1...Shxg5
- 2.Rxd5#
- 1...Shxf8
- 2.Rxd5#
- 1...Qg2
- 2.Qxe6#
- 1...Qd1
- 2.Qxe6#
- 1...Qh1
- 2.Qxe6#
- 1...Qf3
- 2.Sxf3#
- 2.Qxe6#
- 1...Sd4
- 2.Rxe3#
- 2.Qxd5#
- 1...Sf4
- 2.Qxf5#
- 1...Sc7
- 2.Bd6#
- 1...Sg7
- 2.Rxd5#
- 2.Qxd5#
- 1...Sd8
- 2.Rxd5#
- 2.Qxd5#
- 1...Sf6
- 2.Qxe6#
- 1...d4
- 2.Qxe6#
- threat
- 1.Rc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 15
- Sets
- Q(a);N_GUARD,XR(B)::S(E)
- Q(a);N_GUARD::S(E)
- Q(a);N_GUARD::S(E),XQ(a)
- R(f);N_GUARD::QAR1(G),XS(g)
- R(f);S_CUTB(i)::R1(B),XP(c)
- B(i);S_CUTR(f)::QAR1(G),XS(g)
- B(j);S_CUTR(f)::QAR1(G),XS(g)
- S(g);SBLOCK::R(B),XP(b)
- S(g);S_CUTQ(a)::QAR1(G),XP(e)
- Tries
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,XR(B)::S(E)
- R(f);XB(F)::R1(B),XP(c)
- B(i);XB(F)::QAR1(G),XS(g)
- S(g);XP(D)::R1(B),XP(c)
- S(g);XS(E)::R1(B),XP(c)
- S(g);XB(I)::R1(B),XP(c)
- S(h);XS(E)::R1(B),XP(c)
- S(h);XB(I)::R1(B),XP(c)
- Q(a);::QAR1(G),XS(g)
- S(g);SBLOCK::R(B),XP(b)
- S(g);S_CUTB(j)::B(I)
- S(g);::R1(B),XP(c)
- S(h);::QAR1(G),XS(g)
- P(c);::QAR1(G),XS(g)
- Refutation
- S(g);
- Try
- B(I);CHECK
- Vars
- B(j);XB(I)::QAR1(G),XS(g)
- Refutation
- R(f);XB(I)
- Try
- B(I);CHECK
- Refutation
- S(g);XB(I)
- Try
- Q(G);CHECK
- Vars
- S(h);SBLOCK,XQ(G)::S(E)
- Refutation
- K(d);S_FLIGHT,XQ(G)
- Try
- Q(G);P_PINS(g)
- Threat
- S(E)
- Vars
- Q(a);N_GUARD,XR(B)::S(E)
- S(h);N_GUARD,XS(E)::B(I)
- Refutation
- P(e);
- Try
- Q(G);CHECK
- Vars
- S(h);P_SPINS(h)::S(E)
- Refutation
- S(g);XQ(G)
- Try
- P(D);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,XR(B)::S(E)
- R(f);XP(D)::R1(B),XP(c)
- B(i);XP(D)::QAR1(G),XS(g)
- S(g);XS(E)::R1(B),XP(c)
- S(g);XB(I)::R1(B),XP(c)
- S(h);XS(E)::R1(B),XP(c)
- S(h);XB(I)::R1(B),XP(c)
- Q(a);::QAR1(G),XS(g)
- R(f);::QAR1(G),XS(g)
- S(g);SBLOCK::R(B),XP(b)
- S(g);S_CUTQ(a)::QAR1(G),XP(e)
- S(g);::R1(B),XP(c)
- S(h);::QAR1(G),XS(g)
- P(c);::QAR1(G),XS(g)
- Refutation
- S(g);
- Try
- Actual
- R(H);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,XR(B)::S(E)
- R(f);XR(H)::R1(B),XP(c)
- B(i);XR(H)::QAR1(G),XS(g)
- S(h);XS(E)::R1(B),XP(c)
- S(h);XB(I)::R1(B),XP(c)
- Q(a);::QAR1(G),XS(g)
- S(g);S_CUTQ(a)::QAR1(G),XP(e)
- S(g);S_CUTB(j)::B(I)
- S(h);::QAR1(G),XS(g)
- P(c);::QAR1(G),XS(g)
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).