MESON Chess Problem Database
Problem Display
PID: 135414 (Q6n/4R2P/2ppNp1N/2PBk2p/1p2Pp2/8/p3p1P1/2K1B3 w - - 0 1)
Knudsen, Birger
7th Comm., Olympic Ty., 1948
#2
11 + 10
SOLUTION
- SOUND
- Sets
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...a1Q+
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...b3
- 2.Bc3#
- 1...f3
- 2.Bg3#
- 1...h4
- 2.Sg4#
- 1...cxd5
- 2.Qxd5#
- 1...dxc5
- 2.Qb8#
- 1...f5
- 2.Qxh8#
- 1...Sg6
- Tries
- 1.Kc2?
- 1...a1S+
- 2.Qxa1#
- 1...cxd5
- 2.Qxd5#
- 1...dxc5
- 2.Qb8#
- 1...f5
- 2.Qxh8#
- 1...a1Q
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...f3
- 2.Bg3#
- 1...h4
- 2.Sg4#
- 1...b3+!
- 1...a1S+
- 1.Kd2?
- 1...cxd5
- 2.Qxd5#
- 1...dxc5
- 2.Qb8#
- 1...f5
- 2.Qxh8#
- 1...a1Q
- 2.Qxa1#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...a1R
- 2.Qxa1#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...f3
- 2.Bg3#
- 1...h4
- 2.Sg4#
- 1...b3!
- 1...cxd5
- 1.Sf5?
- threat
- 2.Sed4#
- 2.Sg5#
- 2.Sc7#
- 2.Seg7#
- 2.Sd8#
- 2.Sf8#
- 1...a1Q+
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...f3
- 2.Bg3#
- 1...Sg6!
- threat
- 1.Bxc6?
- 1...a1Q+
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...dxc5
- 2.Qb8#
- 1...f5
- 2.Qxh8#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...b3
- 2.Bc3#
- 1...f3
- 2.Bg3#
- 1...h4
- 2.Sg4#
- 1...d5!
- 1...a1Q+
- 1.Rb7?
- 1...a1Q+
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...dxc5
- 2.Qb8#
- 1...f5
- 2.Qxh8#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...b3
- 2.Bc3#
- 1...f3
- 2.Bg3#
- 1...h4
- 2.Sg4#
- 1...cxd5!
- 1...a1Q+
- 1.Rc7?
- 1...a1Q+
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...cxd5
- 2.Qxd5#
- 1...f5
- 2.Qxh8#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...b3
- 2.Bc3#
- 1...f3
- 2.Bg3#
- 1...h4
- 2.Sg4#
- 1...dxc5!
- 1...a1Q+
- 1.Rf7?
- 1...a1Q+
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...Sxf7
- 2.Sxf7#
- 1...cxd5
- 2.Qxd5#
- 1...dxc5
- 2.Qb8#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...b3
- 2.Bc3#
- 1...f3
- 2.Bg3#
- 1...h4
- 2.Sg4#
- 1...f5
- 2.Rxf5#
- 2.Qxh8#
- 1...Sg6!
- 1...a1Q+
- 1.Rg7?
- 1...a1Q+
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...cxd5
- 2.Qxd5#
- 1...dxc5
- 2.Qb8#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...b3
- 2.Bc3#
- 1...f3
- 2.Bg3#
- 1...h4
- 2.Sg4#
- 1...f5!
- 1...a1Q+
- 1.Re8?
- 1...a1Q+
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...cxd5
- 2.Qxd5#
- 1...dxc5
- 2.Qb8#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...b3
- 2.Bc3#
- 1...f3
- 2.Bg3#
- 1...h4
- 2.Sg4#
- 1...f5!
- 1...a1Q+
- 1.Qxa2?
- threat
- 2.Qa1#
- 2.Qb2#
- 1...cxd5
- 2.Qxd5#
- 1...b3
- 2.Bc3#
- 2.Qb2#
- 1...dxc5!
- threat
- 1.g3?
- threat
- 2.gxf4#
- 1...a1Q+
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...fxg3
- 2.Bxg3#
- 1...cxd5
- 2.Qxd5#
- 1...dxc5
- 2.Qb8#
- 1...f5
- 2.Qxh8#
- 1...Sg6
- 2.Sf7#
- 1...f3!
- threat
- 1.g4?
- 1...a1Q+
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...hxg4
- 2.Sxg4#
- 1...cxd5
- 2.Qxd5#
- 1...dxc5
- 2.Qb8#
- 1...fxg4 ep
- 2.Bxg3#
- 1...f5
- 2.Qxh8#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...b3
- 2.Bc3#
- 1...f3
- 2.Bg3#
- 1...h4!
- 1...a1Q+
- 1.Kc2?
- Keys
- 1.Rd7!
- 1...a1Q+
- 2.Qxa1#
- 1...a1R+
- 2.Qxa1#
- 1...cxd5
- 2.Qxd5#
- 1...dxc5
- 2.Qb8#
- 1...f5
- 2.Qxh8#
- 1...a1S
- 2.Qxa1#
- 1...a1B
- 2.Qxa1#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...b3
- 2.Bc3#
- 1...f3
- 2.Bg3#
- 1...h4
- 2.Sg4#
- 1...a1Q+
- 1.Rd7!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- S(j);N_GUARD::S(H)
- S(j);N_GUARD::S(H),XS(j)
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);OGATE::QAB(K),XS(a)
- P(a);OGATE::QAB(K),XB(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- P(c);N_GUARD::B(B)
- P(d);OGATEB::B(B)
- P(f);N_GUARD::S(H)
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- P(h);OGATEB,XP(E)::QAB(K)
- P(i);OGATEB::QAB(K),XS(j)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- P(a);CHECK,OGATE::QAB(K),XS(a)
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- P(h);OGATEB,XP(E)::QAB(K)
- P(i);OGATEB::QAB(K),XS(j)
- P(a);OGATE::QAB(K),XQ(a)
- P(a);OGATE::QAB(K),XB(a)
- P(a);OGATE::QAB(K),XR(a)
- S(j);N_GUARD::S(H)
- S(j);N_GUARD::S(H),XS(j)
- P(d);OGATEB::B(B)
- P(f);N_GUARD::S(H)
- Refutation
- P(c);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- P(h);OGATEB,XP(E)::QAB(K)
- P(i);OGATEB::QAB(K),XS(j)
- P(a);OGATE::QAB(K),XQ(a)
- P(a);OGATE::QAB(K),XS(a)
- P(a);OGATE::QAB(K),XB(a)
- P(a);OGATE::QAB(K),XR(a)
- S(j);N_GUARD::S(H)
- S(j);N_GUARD::S(H),XS(j)
- P(d);OGATEB::B(B)
- P(f);N_GUARD::S(H)
- Refutation
- P(c);
- Try
- S(H);
- Threat
- DUALS(6)
- Vars
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- P(d);OGATEB::B(B)
- Refutation
- S(j);
- Try
- B(F);XP(g)
- Vars
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- P(h);OGATEB,XP(E)::QAB(K)
- P(i);OGATEB::QAB(K),XS(j)
- P(a);OGATE::QAB(K),XS(a)
- P(a);OGATE::QAB(K),XB(a)
- S(j);N_GUARD::S(H)
- S(j);N_GUARD::S(H),XS(j)
- P(c);N_GUARD::B(B)
- P(d);OGATEB::B(B)
- P(f);N_GUARD::S(H)
- Refutation
- P(h);
- Try
- R(I);
- Vars
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- P(h);OGATEB,XP(E)::QAB(K)
- P(i);OGATEB::QAB(K),XS(j)
- P(a);OGATE::QAB(K),XS(a)
- P(a);OGATE::QAB(K),XB(a)
- S(j);N_GUARD::S(H)
- S(j);N_GUARD::S(H),XS(j)
- P(c);N_GUARD::B(B)
- P(d);OGATEB::B(B)
- P(f);N_GUARD::S(H)
- Refutation
- P(g);XB(F)
- Try
- R(I);
- Vars
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- P(i);OGATEB::QAB(K),XS(j)
- P(a);OGATE::QAB(K),XS(a)
- P(a);OGATE::QAB(K),XB(a)
- S(j);N_GUARD::S(H)
- S(j);N_GUARD::S(H),XS(j)
- P(c);N_GUARD::B(B)
- P(d);OGATEB::B(B)
- P(f);N_GUARD::S(H)
- Refutation
- P(h);XP(E)
- Try
- R(I);
- Vars
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- S(j);XR(I)::S(H),XS(j)
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- P(h);OGATEB,XP(E)::QAB(K)
- P(a);OGATE::QAB(K),XS(a)
- P(a);OGATE::QAB(K),XB(a)
- P(c);N_GUARD::B(B)
- P(d);OGATEB::B(B)
- P(f);N_GUARD::S(H)
- Refutation
- S(j);
- Try
- R(I);
- Vars
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- P(h);OGATEB,XP(E)::QAB(K)
- P(a);OGATE::QAB(K),XS(a)
- P(a);OGATE::QAB(K),XB(a)
- S(j);N_GUARD::S(H)
- S(j);N_GUARD::S(H),XS(j)
- P(c);N_GUARD::B(B)
- P(d);OGATEB::B(B)
- P(f);N_GUARD::S(H)
- Refutation
- P(i);
- Try
- R(I);
- Vars
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- P(h);OGATEB,XP(E)::QAB(K)
- P(a);OGATE::QAB(K),XS(a)
- P(a);OGATE::QAB(K),XB(a)
- S(j);N_GUARD::S(H)
- S(j);N_GUARD::S(H),XS(j)
- P(c);N_GUARD::B(B)
- P(d);OGATEB::B(B)
- P(f);N_GUARD::S(H)
- Refutation
- P(i);
- Try
- Q(K);XP(a)
- Threat
- DUALS(2)
- Vars
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- Refutation
- P(h);XP(E)
- Try
- P(C);
- Threat
- P(C),XP(d)
- Vars
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- P(d);OGATE,XP(C)::B(B),XP(d)
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- P(h);OGATEB,XP(E)::QAB(K)
- P(i);OGATEB::QAB(K),XS(j)
- S(j);N_GUARD::S(H)
- Refutation
- P(d);
- Try
- P(C);
- Vars
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- P(f);XP(C)::S(H),XP(f)
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- P(h);OGATEB,XP(E)::QAB(K)
- P(d);EP,OGATEB,XP(C)::B(B),XP(d)
- P(i);OGATEB::QAB(K),XS(j)
- P(a);OGATE::QAB(K),XS(a)
- P(a);OGATE::QAB(K),XB(a)
- S(j);N_GUARD::S(H)
- S(j);N_GUARD::S(H),XS(j)
- P(c);N_GUARD::B(B)
- P(d);OGATEB::B(B)
- Refutation
- P(f);
- Try
- Actual
- R(I);
- Vars
- P(a);CHECK,OGATE::QAB(K),XQ(a)
- P(a);CHECK,OGATE::QAB(K),XR(a)
- P(g);OGATE,XB(F)::QAR1(K),XP(g)
- P(h);OGATEB,XP(E)::QAB(K)
- P(i);OGATEB::QAB(K),XS(j)
- P(a);OGATE::QAB(K),XS(a)
- P(a);OGATE::QAB(K),XB(a)
- S(j);N_GUARD::S(H)
- S(j);N_GUARD::S(H),XS(j)
- P(c);N_GUARD::B(B)
- P(d);OGATEB::B(B)
- P(f);N_GUARD::S(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).