MESON Chess Problem Database
Problem Display
PID: 261555 (8/2bn4/4P2Q/2p5/2n1kr2/1N1RNp1b/1B6/KB6 w - - 0 1)
Johner, Hans
Neue Zurcher Zeitung, 1956
#2
8 + 8
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Rg4
- 2.Rd1#
- 2.Rd2#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Rh4
- 2.Rd1#
- 2.Rd2#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Rf5
- 2.Rd1#
- 2.Rd2#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Rf6
- 2.Rd1#
- 2.Rd2#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Rf7
- 2.Rd1#
- 2.Rd2#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Rf8
- 2.Rd1#
- 2.Rd2#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Be5
- 2.Rc3#
- 1...Sd2
- 2.Sxd2#
- 1...Sa3
- 2.Sd2#
- 1...Sa5
- 2.Sd2#
- 1...Sce5
- 2.Sd2#
- 1...Scb6
- 2.Sd2#
- 1...Sd6
- 2.Sd2#
- 1...Sde5
- 2.Sxc5#
- 1...Sdb6
- 2.Sxc5#
- 1...Sf6
- 2.Sxc5#
- 1...Sb8
- 2.Sxc5#
- 1...Sf8
- 2.Sxc5#
- 1...Rg4
- Tries
- 1.Rd4+?
- 1...Ke5
- 2.Sxc4#
- 2.Rd5#
- 1...Kxe3!
- 1...Ke5
- 1.Qg5?
- threat
- 2.Rc3#
- 2.Qd5#
- 1...Bxe6
- 2.Rc3#
- 1...Sxb2
- 2.Sd2#
- 2.Qd5#
- 1...Sxe3
- 2.Sd2#
- 2.Rd4#
- 1...f2
- 2.Qd5#
- 1...Rg4
- 2.Rd1#
- 2.Rd2#
- 2.Rc3#
- 2.Rd4#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 2.Qf5#
- 1...Rh4
- 2.Rd1#
- 2.Rd2#
- 2.Rc3#
- 2.Rd4#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Rf5
- 2.Rd1#
- 2.Rd2#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Rf6
- 2.Rd1#
- 2.Rd2#
- 2.Rc3#
- 2.Rd4#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Rf7
- 2.Rd1#
- 2.Rd2#
- 2.Rc3#
- 2.Rd4#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Rf8
- 2.Rd1#
- 2.Rd2#
- 2.Rc3#
- 2.Rd4#
- 2.Rd5#
- 2.Rd6#
- 2.Rxd7#
- 1...Bf1
- 2.Qd5#
- 1...Be5
- 2.Rc3#
- 1...Sd2
- 2.Sxd2#
- 2.Qd5#
- 1...Sa3
- 2.Sd2#
- 2.Qd5#
- 1...Sce5
- 2.Sd2#
- 1...Scb6
- 2.Sd2#
- 2.Rc3#
- 1...Sde5
- 2.Sxc5#
- 1...Sdb6
- 2.Sxc5#
- 2.Rc3#
- 1...Sf6
- 2.Sxc5#
- 2.Rc3#
- 1...Bf5!
- threat
- 1.Rd4+?
- Keys
- 1.Be5!
- threat
- 2.Qxf4#
- 1...Bxe5+
- 2.Rc3#
- 1...Kxe5
- 2.Rd5#
- 1...Scxe5
- 2.Sd2#
- 1...Sdxe5
- 2.Sxc5#
- 1...Rg4
- 2.Rd5#
- 1...Rh4
- 2.Rd5#
- 1...Rf5
- 2.Rd5#
- 1...Rf6
- 2.Rd5#
- 1...Rf7
- 2.Rd5#
- 1...Rf8
- 2.Rd5#
- threat
- 1.Be5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 9
- Sets
- B(g);P_PINB(C),SBLOCK::B(B)+R(E)
- S(c);N_GUARD::S(D),XS(c)
- S(c);N_GUARD::S(D)
- S(h);N_GUARD::S(D),XP(f)
- Tries
- Try
- R(E);CHECK
- Refutation
- K(d);P-FLIGHT,P_SPINR(e),XS(F)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- B(b);XP(G)::B(B)+R(E)
- P(a);::QAB1(H)
- B(b);::QAB1(H)
- B(g);P_PINB(C)::B(B)+R(E)
- S(c);N_GUARD::S(D)
- S(h);N_GUARD::S(D),XP(f)
- Refutation
- B(b);
- Try
- Actual
- B(C);
- Threat
- QAR1(H),XR(e)
- Vars
- B(g);CHECK,SBLOCK,XB(C)::B(B)+R(E)
- K(d);N_GUARD,P-FLIGHT,XB(C)::R1(E)
- S(c);N_GUARD,SBLOCK,XB(C)::S(D)
- S(h);N_GUARD,SBLOCK,XB(C)::S(D),XP(f)
- R(e);::B(B)+R(E)
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).