MESON Chess Problem Database
Problem Display
PID: 261011 (8/6p1/1N2p1P1/1nK5/1rp5/1Bk1NQ1R/P4q2/2BRb3 w - - 0 1)
Johner, Hans
Neue Zurcher Zeitung, 1973
#2
10 + 8
| 6490 | yacpdb | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Qxe3+
- 2.Qxe3#
- 1...Qg3
- 2.Sed5#
- 1...Qh4
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sexc4#
- 2.Sg4#
- 2.Sed5#
- 2.Sf5#
- 1...Qf1
- 2.Sxf1#
- 2.Sed5#
- 1...Qxa2
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sexc4#
- 2.Sg4#
- 2.Sed5#
- 2.Sf5#
- 1...Qb2
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sexc4#
- 2.Sg4#
- 2.Sed5#
- 2.Sf5#
- 1...Qc2
- 2.Sxc2#
- 2.Sed5#
- 1...Qd2
- 2.Sed5#
- 1...Qe2
- 2.Sed5#
- 1...Qg2
- 2.Sxg2#
- 2.Sed5#
- 1...Qh2
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sexc4#
- 2.Sg4#
- 2.Sed5#
- 2.Sf5#
- 1...Rxb3
- 2.Sa4#
- 1...Ra4
- 2.Sxa4#
- 1...Sd4
- 2.Sed5#
- 1...e5
- 2.Sd5#
- 1...Qxe3+
- Tries
- 1.Bb2+?
- 1...Qxb2
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sexc4#
- 2.Sg4#
- 2.Sed5#
- 2.Sf5#
- 1...Kxb2!
- 1...Qxb2
- 1.Rd4?
- threat
- 2.Sd1#
- 2.Sed5#
- 1...Qxe3
- 2.Qxe3#
- 1...Qxf3
- 2.Sd1#
- 1...Rxb3
- 2.Sa4#
- 1...cxb3!
- threat
- 1.Qe4?
- 1...Qxe3+
- 2.Rxe3#
- 2.Qxe3#
- 1...Qf5+
- 2.Sed5#
- 1...Qxa2
- 2.Sed5#
- 1...Rxb3
- 2.Sa4#
- 2.Qxc4#
- 1...cxb3
- 2.Rd3#
- 2.Qd3#
- 2.Qxb4#
- 1...Qg1
- 2.Qc2#
- 1...Qg3
- 2.Qc2#
- 1...Qh4
- 2.Sed5#
- 2.Qc2#
- 1...Qf1
- 2.Sed5#
- 2.Qc2#
- 1...Qb2
- 2.Sed5#
- 1...Qc2
- 2.Sed5#
- 2.Qxc2#
- 1...Qd2
- 2.Sed5#
- 1...Qe2
- 2.Sed5#
- 1...Qg2
- 2.Sed5#
- 1...Qh2
- 2.Sed5#
- 1...Qf3
- 2.Qc2#
- 1...Qf4
- 2.Sed5#
- 2.Qc2#
- 1...Qf6
- 2.Sed5#
- 2.Qc2#
- 1...Qf7
- 2.Sed5#
- 2.Qc2#
- 1...Ra4
- 2.Sxa4#
- 1...Bd2
- 2.Qc2#
- 1...Sa3
- 2.Qd4#
- 2.Qe5#
- 1...Sd4
- 2.Sed5#
- 2.Qxd4#
- 1...Sd6
- 2.Qd4#
- 2.Qe5#
- 1...Sa7
- 2.Qd4#
- 2.Qe5#
- 1...Sc7
- 2.Qd4#
- 2.Qe5#
- 1...e5
- 2.Sd5#
- 1...Qf8+!
- 1...Qxe3+
- 1.Qxf2?
- threat
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sexc4#
- 2.Sg4#
- 2.Sed5#
- 2.Sf5#
- 2.Bb2#
- 2.Qxe1#
- 2.Qb2#
- 2.Qc2#
- 1...Rxb3
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sexc4#
- 2.Sg4#
- 2.Sed5#
- 2.Sf5#
- 2.Sa4#
- 2.Qxe1#
- 2.Qc2#
- 1...cxb3
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sec4#
- 2.Sg4#
- 2.Sed5#
- 2.Sf5#
- 2.Bb2#
- 2.Qxe1#
- 2.Qb2#
- 1...Bd2
- 2.Sed5#
- 2.Qxd2#
- 1...Sa3
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sexc4#
- 2.Sg4#
- 2.Sed5#
- 2.Sf5#
- 2.Bb2#
- 2.Qxe1#
- 2.Qb2#
- 1...Sd4
- 2.Sed5#
- 2.Bb2#
- 2.Qxe1#
- 2.Qb2#
- 1...Bxf2!
- threat
- 1.Qf6+?
- 1...Qxf6
- 2.Sed5#
- 1...Sd4
- 2.Sed5#
- 2.Qxd4#
- 1...e5
- 2.Sd5#
- 1...gxf6!
- 1...Qxf6
- 1.Bb2+?
- Keys
- 1.Qf5!
- 1...Qxe3+
- 2.Rxe3#
- 1...Qxf5+
- 2.Sed5#
- 1...Qxa2
- 2.Sed5#
- 1...Rxb3
- 2.Sa4#
- 1...cxb3
- 2.Rd3#
- 2.Qd3#
- 1...exf5
- 2.Sd5#
- 1...Qg1
- 2.Qc2#
- 1...Qg3
- 2.Qc2#
- 1...Qh4
- 2.Sed5#
- 2.Qc2#
- 1...Qf1
- 2.Sed5#
- 2.Qc2#
- 1...Qb2
- 2.Sed5#
- 1...Qc2
- 2.Sed5#
- 2.Qxc2#
- 1...Qd2
- 2.Sed5#
- 1...Qe2
- 2.Sed5#
- 1...Qg2
- 2.Sed5#
- 1...Qh2
- 2.Sed5#
- 1...Qf3
- 2.Qc2#
- 1...Qf4
- 2.Sed5#
- 2.Qc2#
- 1...Ra4
- 2.Sxa4#
- 1...Bd2
- 2.Qc2#
- 1...Sa3
- 2.Qe5#
- 1...Sd4
- 2.Sed5#
- 1...Sd6
- 2.Qe5#
- 1...Sa7
- 2.Qe5#
- 1...Sc7
- 2.Qe5#
- 1...e5
- 2.Sd5#
- 1...Qxe3+
- 1.Qf5!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 13
- REMOVED MATES = 0
- Sets
- Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::QAR2(F),XQ(b)
- Q(b);N_PINS(E)::QAR(F)+S(E),DCHECK
- R(d);N_GUARD,XB(D)::S(I)
- R(d);N_GUARD::S(I),XR(d)
- S(f);N_PINS(E)::QAR(F)+S(E),DCHECK
- P(g);N_GUARD::S(I)
- Tries
- Try
- B(A);CHECK
- Refutation
- K(c);S_FLIGHT,XB(A)
- Try
- R(B);N_SPINS(E)
- Threat
- DUALS(2)
- Vars
- Q(b);OGATE,P_PINR(B),P_SPINQ(b),XS(E)::QAR2(F),XQ(b)
- Q(b);XQ(F)::S(E)
- R(d);N_GUARD,XB(D)::S(I)
- Refutation
- P(e);XB(D)
- Try
- Q(F);
- Vars
- Q(b);CHECK,N_PINS(E)::R(G)+S(E),DCHECK
- Q(b);N_PINS(E),XP(C)::R(G)+S(E),DCHECK
- Q(b);N_GUARD::QAR1(F)
- Q(b);N_GUARD,N_PINS(E)::QAR1(F)
- Q(b);N_PINS(E)::R(G)+S(E),DCHECK
- R(d);N_GUARD::S(I),XR(d)
- B(a);S_CUTQ(b)::QAR1(F)
- P(g);N_GUARD::S(I)
- Refutation
- Q(b);CHECK,N_PINS(E)
- Try
- Q(F);N_SPINS(E),XQ(b)
- Threat
- DUALS(11)
- Refutation
- B(a);P_PINS(E),XQ(F)
- Try
- Q(F);CHECK
- Vars
- Q(b);N_PINS(E),XQ(F)::R(G)+S(E),DCHECK
- P(g);P_SPINP(g)::S(I)
- Refutation
- P(h);XQ(F)
- Try
- Actual
- Q(F);
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::R(G),XQ(b)
- Q(b);CHECK,N_PINS(E),XQ(F)::R(G)+S(E),DCHECK
- Q(b);N_PINS(E),XP(C)::R(G)+S(E),DCHECK
- R(d);N_GUARD,XB(D)::S(I)
- P(g);N_GUARD,XQ(F)::S(I)
- Q(b);N_GUARD::QAR1(F)
- Q(b);N_GUARD,N_PINS(E)::QAR1(F)
- Q(b);N_PINS(E)::R(G)+S(E),DCHECK
- R(d);N_GUARD::S(I),XR(d)
- B(a);S_CUTQ(b)::QAR1(F)
- S(f);N_GUARD::QAB(F)
- S(f);N_PINS(E)::R(G)+S(E),DCHECK
- P(g);N_GUARD::S(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).