MESON Chess Problem Database
Problem Display
PID: 231165 (5Bn1/1Qp1n3/4Pp1p/1P3N1R/prkN4/Rp2P3/3K4/8 w - - 0 1)
Bostrom, Ernst
6th Prize, Kagans Neueste Schachnachrichten, 1927
#2
10 + 9
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Kc5
- 2.Qc6#
- 1...Rxb5
- 2.Qxb5#
- 1...Sd5
- 2.Qc6#
- 1...Sxf5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...b2
- 2.Rc3#
- 1...c5
- 2.Sd6#
- 1...c6
- 2.Sd6#
- 1...Kc5
- Tries
- 1.Sc2?
- 1...Kc5
- 2.Qc6#
- 1...Sxf5
- 2.Qc6#
- 1...bxc2
- 2.Rc3#
- 1...c6
- 2.Sd6#
- 1...Sd5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sc8
- 2.Rh4#
- 2.Qc6#
- 1...b2
- 2.Rc3#
- 1...c5
- 2.Sd6#
- 2.Rh4#
- 1...Rxb5!
- 1...Kc5
- 1.Se2?
- 1...Kc5
- 2.Qc6#
- 1...Sxf5
- 2.Qc6#
- 1...c6
- 2.Sd6#
- 1...Sd5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sc8
- 2.Rh4#
- 2.Qc6#
- 1...b2
- 2.Rc3#
- 1...c5
- 2.Sd6#
- 2.Rh4#
- 1...Rxb5!
- 1...Kc5
- 1.Sf3?
- 1...Kc5
- 2.Qc6#
- 1...Sxf5
- 2.Qc6#
- 1...c6
- 2.Sd6#
- 1...Sd5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sc8
- 2.Rh4#
- 2.Qc6#
- 1...b2
- 2.Rc3#
- 1...c5
- 2.Sd6#
- 2.Rh4#
- 1...Rxb5!
- 1...Kc5
- 1.Sxe7?
- threat
- 2.Qd5#
- 2.Qc6#
- 2.Qxc7#
- 1...Rxb5
- 2.Qxb5#
- 1...c5
- 2.Qd5#
- 1...c6
- 2.Qxc6#
- 1...Sxe7!
- threat
- 1.Bxe7?
- threat
- 2.Qc6#
- 1...Rxb5
- 2.Qxb5#
- 1...c6
- 2.Sd6#
- 2.Qxc6#
- 1...c5
- 2.Sd6#
- 1...Sxe7!
- threat
- 1.Bg7?
- 1...Rxb5
- 2.Qxb5#
- 1...Sxf5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...c6
- 2.Sd6#
- 1...c5
- 2.Sd6#
- 1...Sd5
- 2.Qc6#
- 1...Sg6
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...b2
- 2.Rc3#
- 1...Kc5!
- 1...Rxb5
- 1.Ra1?
- threat
- 2.Rc1#
- 1...Kc5
- 2.Qc6#
- 1...Rxb5
- 2.Qxb5#
- 1...c6
- 2.Sd6#
- 1...Sd5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...b2!
- threat
- 1.Rh1?
- threat
- 2.Rc1#
- 1...Kc5
- 2.Qc6#
- 1...Rxb5
- 2.Qxb5#
- 1...Sd5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...b2
- 2.Rc3#
- 1...c6!
- threat
- 1.Rh4?
- threat
- 2.Sxb3#
- 1...Kc5
- 2.Qc6#
- 1...Sxf5
- 2.Sxf5#
- 2.Qc6#
- 1...Sd5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...b2
- 2.Sb3#
- 2.Rc3#
- 1...c6!
- threat
- 1.Qh1?
- 1...Kc5
- 2.Qc6#
- 1...Sxf5
- 2.Qc6#
- 1...c5
- 2.Sd6#
- 1...Sd5
- 2.Qf1#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...b2
- 2.Rc3#
- 1...c6
- 2.Sd6#
- 1...Rxb5!
- 1...Kc5
- 1.Qg2?
- 1...Kc5
- 2.Qc6#
- 1...Sxf5
- 2.Qc6#
- 1...c5
- 2.Sd6#
- 1...Sd5
- 2.Qf1#
- 2.Qe2#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...b2
- 2.Rc3#
- 1...c6
- 2.Sd6#
- 1...Rxb5!
- 1...Kc5
- 1.Qf3?
- 1...Kc5
- 2.Qc6#
- 1...Sxf5
- 2.Qc6#
- 1...c5
- 2.Sd6#
- 1...Sd5
- 2.Qe2#
- 2.Qf1#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...b2
- 2.Rc3#
- 1...c6
- 2.Sd6#
- 1...Rxb5!
- 1...Kc5
- 1.Qa8?
- 1...Kc5
- 2.Qc6#
- 1...Sxf5
- 2.Qc6#
- 1...c6
- 2.Sd6#
- 1...b2
- 2.Rc3#
- 1...Sd5
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...c5
- 2.Sd6#
- 1...Rxb5!
- 1...Kc5
- 1.Qxc7+?
- 1...Sc6
- 2.Sd6#
- 2.Qxc6#
- 1...Kd5!
- 1...Sc6
- 1.Sc2?
- Keys
- 1.Qe4!
- 1...Kc5
- 2.Qc6#
- 1...Rxb5
- 2.Sxb3#
- 1...Sxf5
- 2.Qc6#
- 1...c5
- 2.Sd6#
- 1...Sd5
- 2.Qd3#
- 1...Sc6
- 2.Qxc6#
- 1...Sg6
- 2.Qc6#
- 1...Sc8
- 2.Qc6#
- 1...b2
- 2.Rc3#
- 1...c6
- 2.Sd6#
- 1...Kc5
- 1.Qe4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- R(c);OGATE,XP(E)::QAB1(I),XR(c)
- S(h);N_GUARD::QAR2(I)
- S(h);N_GUARD,XS(F)::QAR2(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- P(a);OGATE::R1(B)
- P(g);N_GUARD::S(F)
- Tries
- Try
- S(D);
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- S(h);N_GUARD,XS(F)::QAR2(I)
- P(a);OGATE,XS(D)::R1(B)
- P(g);N_GUARD::S(F)
- S(h);N_GUARD::QAR2(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- P(a);OGATE::R1(B)
- Refutation
- R(c);XP(E)
- Try
- S(D);
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- S(h);N_GUARD,XS(F)::QAR2(I)
- P(g);N_GUARD::S(F)
- S(h);N_GUARD::QAR2(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- P(a);OGATE::R1(B)
- Refutation
- R(c);XP(E)
- Try
- S(D);
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- S(h);N_GUARD,XS(F)::QAR2(I)
- P(g);N_GUARD::S(F)
- S(h);N_GUARD::QAR2(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- P(a);OGATE::R1(B)
- Refutation
- R(c);XP(E)
- Try
- S(F);XS(h)
- Threat
- DUALS(3)
- Vars
- R(c);OGATE,XP(E)::QAB1(I),XR(c)
- P(g);::QAB1(I)
- P(g);::QAR2(I),XP(g)
- Refutation
- S(i);XS(F)
- Try
- B(J);XS(h)
- Threat
- QAR2(I)
- Vars
- R(c);OGATE,XP(E)::QAB1(I),XR(c)
- P(g);N_GUARD::S(F)
- Refutation
- S(i);XB(J)
- Try
- B(J);
- Vars
- R(c);OGATE,XP(E)::QAB1(I),XR(c)
- S(h);N_GUARD,XS(F)::QAR2(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- P(g);N_GUARD::S(F)
- S(h);N_GUARD::QAR2(I)
- P(a);OGATE::R1(B)
- Refutation
- K(d);P-FLIGHT
- Try
- R(B);
- Threat
- R(B)
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- R(c);OGATE,XP(E)::QAB1(I),XR(c)
- P(g);N_GUARD::S(F)
- S(h);N_GUARD::QAR2(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- Refutation
- P(a);
- Try
- R(G);
- Threat
- R(G)
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- R(c);OGATE,XP(E)::QAB1(I),XR(c)
- S(h);N_GUARD::QAR2(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- P(a);OGATE::R1(B)
- Refutation
- P(g);
- Try
- R(G);
- Threat
- R(G)+S(D),XP(a)
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- S(h);N_GUARD::QAR2(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- Refutation
- P(g);
- Try
- Q(I);
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- S(h);N_GUARD,XS(F)::QAR2(I)
- P(g);N_GUARD::S(F)
- S(h);SBLOCK::QAB(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- S(h);N_GUARD::QAR2(I)
- P(a);OGATE::R1(B)
- Refutation
- R(c);XP(E)
- Try
- Q(I);
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- S(h);N_GUARD,XS(F)::QAR2(I)
- P(g);N_GUARD::S(F)
- S(h);N_GUARD::QAR2(I),XS(h)
- S(h);N_GUARD::QAR2(I)
- P(a);OGATE::R1(B)
- Refutation
- R(c);XP(E)
- Try
- Q(I);
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- S(h);N_GUARD,XS(F)::QAR2(I)
- P(g);N_GUARD::S(F)
- S(h);N_GUARD::QAR2(I),XS(h)
- S(h);N_GUARD::QAR2(I)
- P(a);OGATE::R1(B)
- Refutation
- R(c);XP(E)
- Try
- Q(I);
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- S(h);N_GUARD,XS(F)::QAR2(I)
- P(g);N_GUARD::S(F)
- P(a);OGATE::R1(B)
- S(h);N_GUARD::QAR2(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- Refutation
- R(c);XP(E)
- Try
- Q(I);CHECK,XP(g)
- Refutation
- K(d);S_FLIGHT
- Try
- Actual
- Q(I);
- Vars
- K(d);P-FLIGHT,P_SPINS(h)::QAR1(I)
- R(c);SBLOCK,XP(E)::QAR(I)+S(D),XP(a)
- S(h);N_GUARD,XS(F)::QAR2(I)
- P(g);N_GUARD::S(F)
- S(h);SBLOCK::QAB1(I)
- S(h);N_GUARD::QAR2(I),XS(h)
- S(h);N_GUARD::QAR2(I)
- P(a);OGATE::R1(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).