MESON Chess Problem Database
Problem Display
PID: 260783 (K2B4/pR1P3p/r1k5/p1pqP3/pp6/N7/1Q4R1/7B w - - 0 1)
Johner, Hans
Neue Zurcher Zeitung, 1923
#2
9 + 9
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Rg6#
- 1...Qxg2
- 2.Bxg2#
- 2.Qxg2#
- 1...Qb3
- 2.Rg6#
- 1...Qc4
- 2.Rg6#
- 1...Qe6
- 2.Rg6#
- 1...Qf7
- 2.Rg6#
- 1...Qg8
- 2.Rg6#
- 2.Rxg8#
- 1...Qd1
- 2.Rg6#
- 1...Qd2
- 2.Rxd2#
- 2.Rg6#
- 1...Qd3
- 2.Rg6#
- 1...Qd4
- 2.Rg6#
- 1...Qxe5
- 2.Rg6#
- 1...Qd6
- 2.Rg6#
- 1...Qxd7
- 2.Rg6#
- 1...Rb6
- 2.Rc7#
- 1...bxa3
- 2.Rc7#
- 2.Qb5#
- 1...h5
- 2.Rg6#
- 1...h6
- 2.Rg6#
- 1...Qa2
- Tries
- 1.Rd2?
- threat
- 2.Bxd5#
- 1...Qxh1
- 2.Rd6#
- 1...Qg2
- 2.Bxg2#
- 2.Rd6#
- 1...Qf3
- 2.Bxf3#
- 2.Rd6#
- 1...Qe4
- 2.Bxe4#
- 2.Rd6#
- 1...c4!
- threat
- 1.Qe2?
- threat
- 2.Qb5#
- 2.Qxa6#
- 1...Qxg2
- 2.Bxg2#
- 2.Qxg2#
- 1...Qxe5
- 2.Rg6#
- 1...Qxd7
- 2.Rg6#
- 1...Qa2
- 2.Rg6#
- 1...Qb3
- 2.Rg6#
- 1...Qf3
- 2.Qxf3#
- 1...Qc4
- 2.Rg6#
- 1...Qe4
- 2.Qxe4#
- 1...Qe6
- 2.Rg6#
- 1...Qf7
- 2.Rg6#
- 1...Qg8
- 2.Rg6#
- 2.Rxg8#
- 1...Qd1
- 2.Rg6#
- 1...Qd2
- 2.Rg6#
- 1...Qd3
- 2.Rg6#
- 1...Qd4
- 2.Rg6#
- 1...Qd6
- 2.Rg6#
- 1...Rb6
- 2.Rc7#
- 1...c4!
- threat
- 1.Rd2?
- Keys
- 1.Qd4!
- 1...Qxg2
- 2.Bxg2#
- 2.Qd6#
- 1...Qxd4
- 2.Rg6#
- 1...Qxe5
- 2.Rg6#
- 1...Qxd7
- 2.Rg6#
- 2.Qxd7#
- 1...bxa3
- 2.Qxa4#
- 1...cxd4
- 2.Rc2#
- 1...b3
- 2.Qxa4#
- 1...Qa2
- 2.Rxa2#
- 2.Rg6#
- 2.Qd6#
- 1...Qb3
- 2.Rg6#
- 2.Qd6#
- 1...Qf3
- 2.Qd6#
- 1...Qc4
- 2.Rg6#
- 2.Qd6#
- 1...Qe4
- 2.Qxe4#
- 2.Qd6#
- 1...Qe6
- 2.Rg6#
- 1...Qf7
- 2.Rg6#
- 2.Qd6#
- 1...Qg8
- 2.Rg6#
- 2.Rxg8#
- 2.Qd6#
- 1...Qd6
- 2.Rg6#
- 2.Qxd6#
- 1...Rb6
- 2.Rc7#
- 1...c4
- 2.Rc7#
- 1...h5
- 2.Rg6#
- 1...h6
- 2.Rg6#
- 1...Qxg2
- 1.Qd4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 8
- Sets
- Q(e);::B(A)+R(C),DCHECK
- Q(e);S_CUTP(i)::B(A)+R(C)
- Q(e);XP(E)::B(A)+R(C),DCHECK
- Q(e);XP(G)::B(A)+R(C),DCHECK
- R(f);SBLOCK::R1(F)
- P(i);N_GUARD::R(C)
- Tries
- Try
- R(C);P_PINQ(e)
- Threat
- B(A),XQ(e)
- Vars
- Q(e);N_SPINQ(e),OGATE,XB(A)::R1(C)
- Refutation
- P(d);
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(e);XP(E)::B(A)+R(C),DCHECK
- Q(e);XP(G)::B(A)+R(C),DCHECK
- Q(e);::B(A)+R(C),DCHECK
- Q(e);OGATEB::QAB(B),XQ(e)
- Q(e);S_CUTP(i)::B(A)+R(C)
- R(f);SBLOCK::R1(F)
- Refutation
- P(d);
- Try
- Actual
- Q(B);
- Vars
- Q(e);XQ(B)::B(A)+R(C),DCHECK
- Q(e);XP(E)::B(A)+R(C),DCHECK
- P(b);OGATE,XS(D)::QAB(B),XP(a)
- P(d);OGATEB,XQ(B)::R(C)
- P(b);OGATE::QAB(B),XP(a)
- Q(e);OGATE::QAR1(B)
- Q(e);S_CUTP(i)::B(A)+R(C)
- R(f);SBLOCK::R1(F)
- P(d);::R1(F)
- P(i);N_GUARD::R(C)
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).