MESON Chess Problem Database
Problem Display
PID: 176260 (8/1K2Pp2/pb1N1N2/2Bp1pQr/3RPR2/4k2b/qP2r3/7n w - - 0 1)
Laib, Kurt Friedrich
3rd Prize, Schach-Echo, 1972
#2
10 + 11
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sxd5#
- 1...Qa1
- 2.Sxd5#
- 1...Qxb2
- 2.Sxd5#
- 1...Qa3
- 2.Sxd5#
- 1...Qa4
- 2.Sxd5#
- 1...Qa5
- 2.Sxd5#
- 1...Rh6
- 2.Rxf5#
- 1...Rh7
- 2.Rxf5#
- 1...Rh8
- 2.Rxf5#
- 1...Bf1
- 2.Sxf5#
- 1...Bg2
- 2.Sxf5#
- 1...Ba5
- 2.Rxd5#
- 1...Bc7
- 2.Rxd5#
- 1...Bd8
- 2.Rxd5#
- 1...Sf2
- 2.Qg3#
- 1...Sg3
- 2.Qxg3#
- 1...Qb1
- Tries
- 1.Sc4+?
- 1...dxc4
- 2.Sd5#
- 1...Qxc4!
- 1...dxc4
- 1.Sg4+?
- 1...fxg4
- 2.Sf5#
- 1...Bxg4!
- 1...fxg4
- 1.Rf1+?
- 1...f4
- 2.Qxf4#
- 1...Rxg5!
- 1...f4
- 1.exd5?
- threat
- 2.e8Q#
- 2.e8R#
- 1...Qxd5+
- 2.Sxd5#
- 1...Qxb2
- 2.Sc4#
- 2.e8Q#
- 2.e8R#
- 1...Rxb2
- 2.e8Q#
- 2.e8R#
- 1...Rxg5
- 2.e8Q#
- 2.e8R#
- 1...Bxc5
- 2.e8Q#
- 2.e8R#
- 1...Re1
- 2.e8Q#
- 2.e8R#
- 1...Rc2
- 2.e8Q#
- 2.e8R#
- 1...Rd2
- 2.e8Q#
- 2.e8R#
- 1...Rf2
- 2.e8Q#
- 2.e8R#
- 1...Rg2
- 2.e8Q#
- 2.e8R#
- 1...Rh2
- 2.e8Q#
- 2.e8R#
- 1...Qb1
- 2.Sc4#
- 1...Qb3
- 2.e8Q#
- 2.e8R#
- 1...Qc4
- 2.Sxc4#
- 2.e8Q#
- 2.e8R#
- 1...Qa1
- 2.Sc4#
- 2.e8Q#
- 2.e8R#
- 1...Qa3
- 2.Sc4#
- 2.e8Q#
- 2.e8R#
- 1...Qa5
- 2.Sc4#
- 2.e8Q#
- 2.e8R#
- 1...Rh4
- 2.e8Q#
- 2.e8R#
- 1...Rh6
- 2.Rxf5#
- 2.e8Q#
- 2.e8R#
- 1...Rh7
- 2.Rxf5#
- 2.e8Q#
- 2.e8R#
- 1...Rh8
- 2.Rxf5#
- 1...Bf1
- 2.Sxf5#
- 2.e8Q#
- 2.e8R#
- 1...Bg2
- 2.Sxf5#
- 1...Bg4
- 2.e8Q#
- 2.e8R#
- 1...Ba5
- 2.Rd1#
- 2.e8Q#
- 2.e8R#
- 1...Ba7
- 2.e8Q#
- 2.e8R#
- 1...Bc7
- 2.Rd1#
- 2.e8Q#
- 2.e8R#
- 1...Bd8
- 2.Rd1#
- 1...Sf2
- 2.Qg3#
- 1...Sg3
- 2.Qxg3#
- 1...a5
- 2.e8Q#
- 2.e8R#
- 1...Qa4!
- threat
- 1.Sc4+?
- Keys
- 1.exf5!
- threat
- 2.e8Q#
- 2.e8R#
- 1...Qxb2
- 2.Sxd5#
- 2.e8Q#
- 2.e8R#
- 1...Rxb2
- 2.e8Q#
- 2.e8R#
- 1...Rxg5
- 2.e8Q#
- 2.e8R#
- 1...Bxf5
- 2.Sxf5#
- 1...Bxc5
- 2.e8Q#
- 2.e8R#
- 1...Re1
- 2.e8Q#
- 2.e8R#
- 1...Rc2
- 2.e8Q#
- 2.e8R#
- 1...Rd2
- 2.e8Q#
- 2.e8R#
- 1...Rf2
- 2.e8Q#
- 2.e8R#
- 1...Rg2
- 2.e8Q#
- 2.e8R#
- 1...Rh2
- 2.e8Q#
- 2.e8R#
- 1...Qb1
- 2.Sxd5#
- 1...Qb3
- 2.e8Q#
- 2.e8R#
- 1...Qc4
- 2.e8Q#
- 2.e8R#
- 1...Qa1
- 2.Sxd5#
- 2.e8Q#
- 2.e8R#
- 1...Qa3
- 2.Sxd5#
- 2.e8Q#
- 2.e8R#
- 1...Qa4
- 2.Sxd5#
- 1...Qa5
- 2.Sxd5#
- 2.e8Q#
- 2.e8R#
- 1...Rh4
- 2.e8Q#
- 2.e8R#
- 1...Rh6
- 2.Rf1#
- 2.e8Q#
- 2.e8R#
- 1...Rh7
- 2.Rf1#
- 2.e8Q#
- 2.e8R#
- 1...Rh8
- 2.Rf1#
- 1...Bf1
- 2.Sg4#
- 2.e8Q#
- 2.e8R#
- 1...Bg2
- 2.Sg4#
- 1...Bg4
- 2.Sxg4#
- 2.e8Q#
- 2.e8R#
- 1...Ba5
- 2.Rxd5#
- 2.e8Q#
- 2.e8R#
- 1...Ba7
- 2.e8Q#
- 2.e8R#
- 1...Bc7
- 2.Rxd5#
- 2.e8Q#
- 2.e8R#
- 1...Bd8
- 2.Rxd5#
- 1...Sf2
- 2.Qg3#
- 1...Sg3
- 2.Qxg3#
- 1...a5
- 2.e8Q#
- 2.e8R#
- threat
- 1.exf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- Q(b);N_GUARD::S(H),XP(f)
- Q(b);N_GUARD,XP(A)::S(H),XP(f)
- R(h);N_GUARD::QAB(F)+R(D),XP(g)
- B(e);N_GUARD::S(G),XP(g)
- B(j);N_GUARD::B(E)+R(B),XP(f)
- S(a);N_GUARD::QAR2(F)
- S(a);N_GUARD::QAR2(F),XS(a)
- Tries
- Try
- S(G);CHECK
- Vars
- P(f);XS(G)::S(H)
- Refutation
- Q(b);XS(G)
- Try
- S(H);CHECK
- Vars
- P(g);XS(H)::S(G)
- Refutation
- B(e);XS(H)
- Try
- R(D);CHECK
- Vars
- P(g);P_SPINP(g)::QAB1(F),XP(g)
- Refutation
- R(h);XQ(F)
- Try
- P(C);XP(f)
- Threat
- P=Q
- Vars
- Q(b);CHECK,XP(C)::S(H),XQ(b)
- R(c);XP(A)::P=Q
- R(h);XQ(F)::P=Q
- B(j);XB(E)::P=Q
- R(c);::P=Q
- Q(b);N_GUARD::S(G)
- Q(b);::P=Q
- R(h);::P=Q
- R(h);N_GUARD::QAB(F)+R(D),XP(g)
- B(e);N_GUARD,P_PINP(C)::S(G),XP(g)
- B(e);::P=Q
- B(j);::P=Q
- B(j);N_GUARD::B(E)+R(B)
- S(a);N_GUARD::QAR2(F)
- S(a);N_GUARD::QAR2(F),XS(a)
- P(i);::P=Q
- Refutation
- Q(b);
- Try
- Actual
- P(C);XP(g)
- Threat
- P=Q
- Vars
- R(c);XP(A)::P=Q
- R(h);XQ(F)::P=Q
- B(e);XP(C)::S(G),XB(e)
- B(j);XB(E)::P=Q
- R(c);::P=Q
- Q(b);N_GUARD::S(H),XP(f)
- Q(b);::P=Q
- R(h);::P=Q
- R(h);N_GUARD::QAB(F)+R(D)
- B(e);N_GUARD::S(H)
- B(j);::P=Q
- B(j);N_GUARD::B(E)+R(B),XP(f)
- S(a);N_GUARD::QAR2(F)
- S(a);N_GUARD::QAR2(F),XS(a)
- P(i);::P=Q
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).