MESON Chess Problem Database
Problem Display
PID: 37467 (1Q6/Kp1b4/N7/3BRp2/2Pk4/3r1r2/1Pn2R2/6B1 w - - 0 1)
Johner, Hans
Neue Zurcher Zeitung, 1965
#2
9 + 7
| 3690 | Kunstschach in der Schweiz | 1980 |
SOLUTION
- SOUND
- Sets
- 1...Rd1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Ra3
- 2.Rd2#
- 1...Rb3
- 2.Rd2#
- 1...Rc3
- 2.Rd2#
- 1...Rde3
- 2.Rd2#
- 1...Rfe3
- 2.Rf4#
- 1...Rg3
- 2.Rf4#
- 1...Rh3
- 2.Rf4#
- 1...Rf4
- 2.Rxf4#
- 1...f4
- 2.Re4#
- 1...Rd1
- Tries
- 1.Rxf3+?
- 1...Se3
- 2.Rf4#
- 1...Re3!
- 1...Se3
- 1.Re1?
- threat
- 2.Qe5#
- 2.Qh8#
- 1...bxa6
- 2.Qb6#
- 1...Rd1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Ra3
- 2.Rd2#
- 1...Rb3
- 2.Rd2#
- 1...Rc3
- 2.Rd2#
- 1...Rde3
- 2.Rd2#
- 1...Rfe3
- 2.Rf4#
- 1...Rg3
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Rh3
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Bc8
- 2.Qe5#
- 1...Be8
- 2.Qe5#
- 1...Se3
- 2.Qh8#
- 1...Sxe1!
- threat
- 1.Rxf5?
- threat
- 2.Qe5#
- 1...Ke3
- 2.Qe5#
- 1...Rxf5
- 2.Rf4#
- 1...bxa6
- 2.Qb6#
- 1...Rd1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Ra3
- 2.Rd2#
- 1...Rb3
- 2.Rd2#
- 1...Rc3
- 2.Rd2#
- 1...Rde3
- 2.Rd2#
- 1...Rfe3
- 2.R2f4#
- 1...Bxf5!
- threat
- 1.Re6?
- threat
- 2.Qe5#
- 2.Qh8#
- 1...bxa6
- 2.Qb6#
- 1...Rd1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Ra3
- 2.Rd2#
- 1...Rb3
- 2.Rd2#
- 1...Rc3
- 2.Rd2#
- 1...Rde3
- 2.Rd2#
- 1...Rfe3
- 2.Rf4#
- 1...Rg3
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Rh3
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Bc8
- 2.Qe5#
- 1...Be8
- 2.Qe5#
- 1...Bxe6!
- threat
- 1.Re7?
- threat
- 2.Qe5#
- 2.Qh8#
- 1...bxa6
- 2.Qb6#
- 1...Rd1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Ra3
- 2.Rd2#
- 1...Rb3
- 2.Rd2#
- 1...Rc3
- 2.Rd2#
- 1...Rde3
- 2.Rd2#
- 1...Rfe3
- 2.Rf4#
- 1...Rg3
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Rh3
- 2.Rf4#
- 2.Qf4#
- 2.Qe5#
- 1...Bc8
- 2.Qe5#
- 1...Be8
- 2.Qe5#
- 1...Be6!
- threat
- 1.Qh8?
- threat
- 2.Re1#
- 2.Ree2#
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Rd1
- 2.Rd2#
- 1...Rd2
- 2.Rxd2#
- 1...Ra3
- 2.Rd2#
- 1...Rb3
- 2.Rd2#
- 1...Rc3
- 2.Rd2#
- 1...Rde3
- 2.Rd2#
- 1...Rfe3
- 2.Rf4#
- 2.Re4#
- 1...Rg3
- 2.Rf4#
- 2.Re4#
- 1...Rh3
- 2.Rf4#
- 2.Re4#
- 1...Be6
- 2.Re1#
- 2.Ree2#
- 2.Re4#
- 2.Rxe6#
- 1...Be8
- 2.Re1#
- 2.Ree2#
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Rxe8#
- 1...Se1
- 2.Rxe1#
- 2.Ree2#
- 2.Re4#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Se3
- 2.Re4#
- 2.Rxf5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...bxa6!
- threat
- 1.Rxf3+?
- Keys
- 1.Re3!
- threat
- 2.Qe5#
- 1...Kxe3
- 2.Qe5#
- 1...Rdxe3
- 2.Rd2#
- 1...Rfxe3
- 2.Rf4#
- 1...Sxe3
- 2.Qh8#
- 1...bxa6
- 2.Qb6#
- threat
- 1.Re3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 9
- Sets
- R(b);::B(A)+R(C),DCHECK
- R(b);::B(A)+R(C),DCHECK,XR(b)
- R(b);P_PINS(G)::B(A)+R(C),DCHECK
- R(b);S_CUTR(c),S_CUTR(c),S_CUTS(a)::R(C)
- R(c);OGATE::R(C)
- R(c);OGATE::B(A)+R(C),DCHECK
- R(c);OGATE::B(A)+R(C),DCHECK,XR(c)
- P(e);N_GUARD::R1(F)
- Tries
- Try
- R(C);CHECK,XR(c)
- Vars
- S(a);P_SPINS(a)::R(C)
- Refutation
- R(b);P_SPINR(b)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- P(f);OGATE,XS(G)::QAB(I)
- R(b);::B(A)+R(C),DCHECK
- R(b);::B(A)+R(C),DCHECK,XR(b)
- R(b);P_PINS(G)::B(A)+R(C),DCHECK
- R(b);S_CUTR(c),S_CUTR(c),S_CUTS(a)::R(C)
- R(c);OGATE::R(C)
- B(g);::QAB1(I)
- S(a);::QAB(I)
- Refutation
- S(a);XR(F)
- Try
- R(F);XP(e)
- Threat
- QAB1(I)
- Vars
- K(d);S_FLIGHT::QAR2(I)
- R(c);OGATE,XR(F)::B(A)+R(C),DCHECK
- P(f);OGATE,XS(G)::QAB(I)
- R(b);::B(A)+R(C),DCHECK
- R(b);::B(A)+R(C),DCHECK,XR(b)
- R(b);P_PINS(G)::B(A)+R(C),DCHECK
- R(b);S_CUTR(c),S_CUTR(c),S_CUTS(a)::R(C)
- R(c);OGATE::R(C)
- Refutation
- B(g);XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- P(f);OGATE,XS(G)::QAB(I)
- R(b);::B(A)+R(C),DCHECK
- R(b);::B(A)+R(C),DCHECK,XR(b)
- R(b);P_PINS(G)::B(A)+R(C),DCHECK
- R(b);S_CUTR(c),S_CUTR(c),S_CUTS(a)::R(C)
- R(c);OGATE::R(C)
- B(g);::QAB1(I)
- Refutation
- B(g);XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- P(f);OGATE,XS(G)::QAB(I)
- R(b);::B(A)+R(C),DCHECK
- R(b);::B(A)+R(C),DCHECK,XR(b)
- R(b);P_PINS(G)::B(A)+R(C),DCHECK
- R(b);S_CUTR(c),S_CUTR(c),S_CUTS(a)::R(C)
- R(c);OGATE::R(C)
- B(g);::QAB1(I)
- Refutation
- B(g);
- Try
- Q(I);
- Threat
- DUALS(6)
- Vars
- R(b);::B(A)+R(C),DCHECK
- R(b);::B(A)+R(C),DCHECK,XR(b)
- R(b);P_PINS(G)::B(A)+R(C),DCHECK
- R(b);S_CUTR(c),S_CUTR(c),S_CUTS(a)::R(C)
- Refutation
- P(f);XS(G)
- Try
- Actual
- R(F);
- Threat
- QAB1(I)
- Vars
- K(d);S_FLIGHT,XR(F)::QAR2(I)
- R(b);OGATEB,XR(F)::R(C)
- R(c);OGATE,XR(F)::R(C)
- S(a);SBLOCK,XR(F)::QAB(I)
- P(f);OGATE,XS(G)::QAB(I)
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).