MESON Chess Problem Database
Problem Display
PID: 159173 (8/8/4KB2/2N1N3/8/bP6/1k2q1Qr/R1R5 w - - 0 1)
Andersen, Idon Bruno Hovedskou
Schweizerische Arbeiter Schach-Kalendar, 1947
#2
8 + 4
| 15148 | Sadier Collection | 2016 |
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qd2
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qf2
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qxg2
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Rh1
- 2.Qxe2#
- 1...Rh3
- 2.Qxe2#
- 1...Rh4
- 2.Qxe2#
- 1...Rh5
- 2.Qxe2#
- 1...Rh6
- 2.Qxe2#
- 1...Rh7
- 2.Qxe2#
- 1...Rh8
- 2.Qxe2#
- 1...Qc2
- Tries
- 1.Kd5?
- threat
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 1...Qd2+
- 2.Sed3#
- 1...Qxg2+
- 2.Sf3#
- 1...Rxg2
- 2.Sed3#
- 2.Sc4#
- 1...Rh3
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Qxe2#
- 1...Rh4
- 2.Sed3#
- 2.Sc4#
- 2.Sg4#
- 2.Qxe2#
- 1...Rh5
- 2.Qxe2#
- 1...Rh6
- 2.Sed3#
- 2.Sc4#
- 2.Sg6#
- 2.Qxe2#
- 1...Bb4
- 2.Sed3#
- 2.Sc4#
- 1...Bxc5!
- threat
- 1.Kd6?
- threat
- 2.Sd3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sd7#
- 2.Sf7#
- 1...Qd2+
- 2.Sd3#
- 1...Rxg2
- 2.Sd3#
- 2.Sc4#
- 1...Rh3
- 2.Sd3#
- 2.Sf3#
- 2.Sc4#
- 2.Qxe2#
- 1...Rh4
- 2.Sd3#
- 2.Sc4#
- 2.Sg4#
- 2.Qxe2#
- 1...Rh5
- 2.Sd3#
- 2.Sc4#
- 2.Qxe2#
- 1...Rh6
- 2.Sd3#
- 2.Sc4#
- 2.Sg6#
- 2.Qxe2#
- 1...Bb4
- 2.Sd3#
- 2.Sc4#
- 1...Bxc5+!
- threat
- 1.Kd7?
- threat
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sf7#
- 1...Qd2+
- 2.Sed3#
- 1...Rh7+
- 2.Sf7#
- 1...Rxg2
- 2.Sed3#
- 2.Sc4#
- 1...Rh3
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Qxe2#
- 1...Rh4
- 2.Sed3#
- 2.Sc4#
- 2.Sg4#
- 2.Qxe2#
- 1...Rh5
- 2.Sed3#
- 2.Sc4#
- 2.Qxe2#
- 1...Rh6
- 2.Sed3#
- 2.Sc4#
- 2.Sg6#
- 2.Qxe2#
- 1...Bb4
- 2.Sed3#
- 2.Sc4#
- 1...Bxc5!
- threat
- 1.Qf3?
- threat
- 2.Sa4#
- 2.Qc3#
- 1...Qc4+
- 2.Sxc4#
- 1...Qa6+
- 2.Sc6#
- 1...Qxe5+
- 2.Bxe5#
- 1...Qxf3
- 2.Sed3#
- 2.Sxf3#
- 2.Sc4#
- 1...Bxc5
- 2.Qc3#
- 1...Qd3
- 2.Sexd3#
- 2.Sc4#
- 1...Qb5
- 2.Sed3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 2.Qc3#
- 1...Qe1
- 2.Sa4#
- 1...Qc2
- 2.Sa4#
- 2.Sed3#
- 2.Sc4#
- 1...Qd2
- 2.Sa4#
- 2.Sed3#
- 2.Sc4#
- 1...Qe4
- 2.Qc3#
- 1...Rh3
- 2.Sa4#
- 2.Qxe2#
- 1...Rh4
- 2.Qxe2#
- 2.Qc3#
- 1...Bb4
- 2.Sa4#
- 1...Qe3!
- threat
- 1.Qe4?
- threat
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 2.Qb1#
- 2.Qd4#
- 1...Qc4+
- 2.Sxc4#
- 1...Qg4+
- 2.Sxg4#
- 1...Qa6+
- 2.Sc6#
- 1...Bxc5
- 2.Qb1#
- 1...Qc2
- 2.Sed3#
- 2.Sc4#
- 1...Qe3
- 2.Sed3#
- 2.Sc4#
- 2.Qb1#
- 1...Qd1
- 2.Sed3#
- 2.Sc4#
- 2.Qb1#
- 1...Qf1
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Qb1#
- 2.Qd4#
- 1...Qd3
- 2.Sexd3#
- 2.Sc4#
- 1...Qf3
- 2.Sed3#
- 2.Sxf3#
- 2.Sc4#
- 2.Qb1#
- 1...Qh5
- 2.Sed3#
- 2.Sc4#
- 2.Qb1#
- 2.Qd4#
- 1...Qe1
- 2.Sed3#
- 2.Sc4#
- 2.Qb1#
- 1...Qd2
- 2.Sed3#
- 2.Sc4#
- 2.Qb1#
- 1...Qf2
- 2.Sed3#
- 2.Sc4#
- 2.Qb1#
- 1...Rf2
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Qb1#
- 2.Qd4#
- 1...Rh3
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Qb1#
- 2.Qxe2#
- 1...Rh4
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 2.Qb1#
- 2.Qxe2#
- 1...Rh5
- 2.Sed3#
- 2.Sc4#
- 2.Qb1#
- 2.Qxe2#
- 2.Qd4#
- 1...Rh6
- 2.Sed3#
- 2.Sc4#
- 2.Sg6#
- 2.Qb1#
- 2.Qxe2#
- 2.Qd4#
- 1...Bb4
- 2.Sed3#
- 2.Sc4#
- 2.Qb1#
- 1...Qxe4!
- threat
- 1.Qg3?
- threat
- 2.Sa4#
- 2.Qc3#
- 1...Qc4+
- 2.Sxc4#
- 1...Qg4+
- 2.Sxg4#
- 1...Qa6+
- 2.Sc6#
- 1...Qxe5+
- 2.Bxe5#
- 2.Qxe5#
- 1...Bxc5
- 2.Qc3#
- 1...Qd3
- 2.Sexd3#
- 2.Sc4#
- 1...Qf3
- 2.Sed3#
- 2.Sxf3#
- 2.Sc4#
- 1...Qb5
- 2.Sed3#
- 2.Sf3#
- 2.Sc4#
- 2.Sg4#
- 2.Sc6#
- 2.Sg6#
- 2.Sed7#
- 2.Sf7#
- 2.Qc3#
- 1...Qe1
- 2.Sa4#
- 1...Qc2
- 2.Sa4#
- 2.Sed3#
- 2.Sc4#
- 1...Qd2
- 2.Sa4#
- 2.Sed3#
- 2.Sc4#
- 1...Qe4
- 2.Qc3#
- 1...Rh3
- 2.Sa4#
- 1...Rh4
- 2.Qc3#
- 1...Bb4
- 2.Sa4#
- 1...Qe3!
- threat
- 1.Qg6?
- threat
- 2.Qb1#
- 1...Qc4+
- 2.Sxc4#
- 1...Qg4+
- 2.Sxg4#
- 1...Qa6+
- 2.Sc6#
- 1...Qxe5+
- 2.Bxe5#
- 1...Qc2
- 2.Sed3#
- 2.Sc4#
- 1...Qd3
- 2.Sexd3#
- 2.Sc4#
- 1...Qe4!
- threat
- 1.Kd5?
- Keys
- 1.Qa8!
- threat
- 2.Qxa3#
- 1...Qc4+
- 2.Sxc4#
- 1...Qg4+
- 2.Sxg4#
- 1...Qa6+
- 2.Sc6#
- 1...Qxe5+
- 2.Bxe5#
- 1...Bxc5
- 2.Rab1#
- 2.Qa2#
- 1...Qc2
- 2.Sed3#
- 2.Sc4#
- 1...Bb4
- 2.Rab1#
- 2.Qa2#
- threat
- 1.Qa8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 7
- Sets
- R(c);N_GUARD::QAR(C),XQ(b)
- R(c);N_GUARD,P_PINB(H)::QAR(C),XQ(b)
- Tries
- Try
- K(G);N_SPINS(F),S_FLIGHT
- Threat
- DUALS(8)
- Vars
- Q(b);CHECK::B(H)+S(F),DCHECK
- Q(b);CHECK,N_SPINQ(b),XQ(C)::B(H)+S(F)
- R(c);N_GUARD,P_PINS(F)::QAR(C),XQ(b)
- Refutation
- B(d);XS(E)
- Try
- K(G);N_SPINS(F),P-FLIGHT,P_SPINS(E)
- Threat
- DUALS(8)
- Vars
- Q(b);CHECK::B(H)+S(F),DCHECK
- Refutation
- B(d);CHECK,XS(E)
- Try
- K(G);N_SPINS(F),S_FLIGHT
- Threat
- DUALS(7)
- Vars
- Q(b);CHECK::B(H)+S(F),DCHECK
- R(c);CHECK::B(H)+S(F)
- Refutation
- B(d);XS(E)
- Try
- Q(C);N_PINQ(b)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,N_PINS(F)::B(H)+S(F),DCHECK,XQ(b)
- Q(b);CHECK,N_PINS(F)::B(H)+S(F)
- Q(b);CHECK,OGATE,P_SPINQ(b),XS(F)::B(H),XQ(b)
- B(d);XS(E)::QAB1(C)
- Q(b);::S(E)
- Q(b);::QAB1(C)
- B(d);::S(E)
- Refutation
- Q(b);
- Try
- Q(C);N_PINQ(b),N_SPINS(F)
- Threat
- DUALS(10)
- Vars
- Q(b);CHECK::B(H)+S(F),DCHECK,XQ(b)
- Q(b);CHECK::B(H)+S(F),XQ(b)
- Q(b);CHECK::B(H)+S(F)
- B(d);XS(E)::QAR1(C)
- Refutation
- Q(b);P_PINS(F),XQ(C)
- Try
- Q(C);N_PINQ(b)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,N_PINS(F)::B(H)+S(F),DCHECK,XQ(b)
- Q(b);CHECK,N_PINS(F)::B(H)+S(F),XQ(b)
- Q(b);CHECK,N_PINS(F)::B(H)+S(F)
- B(d);XS(E)::QAB1(C)
- Q(b);::S(E)
- Q(b);::QAB1(C)
- R(c);::S(E)
- R(c);::QAB1(C)
- B(d);::S(E)
- Refutation
- Q(b);
- Try
- Q(C);N_PINQ(b)
- Threat
- QAR1(C)
- Vars
- Q(b);CHECK,N_PINS(F)::B(H)+S(F),DCHECK,XQ(b)
- Q(b);CHECK,N_PINS(F)::B(H)+S(F),XQ(b)
- Q(b);CHECK,N_PINS(F)::B(H)+S(F)
- Q(b);CHECK,OGATE,P_SPINQ(b),XS(F)::B(H),XQ(b)
- Refutation
- Q(b);
- Try
- Actual
- Q(C);N_PINQ(b)
- Threat
- QAB1(C),XB(d)
- Vars
- Q(b);CHECK,N_PINS(F)::B(H)+S(F),DCHECK,XQ(b)
- Q(b);CHECK,N_PINS(F)::B(H)+S(F),XQ(b)
- Q(b);CHECK,N_PINS(F)::B(H)+S(F)
- Q(b);CHECK,OGATE,P_SPINQ(b),XS(F)::B(H),XQ(b)
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).