MESON Chess Problem Database
Problem Display
PID: 221478 (1N6/2r1pp2/3Rpp2/r3kP2/1Q5N/P1P5/1K2n2b/2B4B w - - 0 1)
Swane, Jan Arnold Willem
Suomen Shakki, 1949
#2
10 + 9
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxc3
- 2.Sd7#
- 1...Rc4
- 2.Sd7#
- 1...Rc6
- 2.Sxc6#
- 2.Sd7#
- 1...Ra7
- 2.Sc6#
- 1...Rb7
- 2.Sc6#
- 1...Rd7
- 2.Sc6#
- 2.Sxd7#
- 1...Rc8
- 2.Sd7#
- 1...Sxc1
- 2.Qd4#
- 1...Sg1
- 2.Qd4#
- 1...Sxc3
- 2.Qd4#
- 1...Sg3
- 2.Bf4#
- 2.Qd4#
- 2.Qf4#
- 1...Sd4
- 2.Qxd4#
- 2.cxd4#
- 1...Sf4
- 2.Qd4#
- 1...exf5
- 2.Sf3#
- 1...exd6
- 2.Qe4#
- 1...Rxc3
- Tries
- 1.Sg6+?
- 1...Kxf5
- 2.Qe4#
- 1...fxg6!
- 1...Kxf5
- 1.Bf4+?
- 1...Sxf4
- 2.Qd4#
- 1...Bxf4!
- 1...Sxf4
- 1.Rd2?
- threat
- 2.Rxe2#
- 2.Qe4#
- 1...Rxc3
- 2.Sd7#
- 2.Qe4#
- 1...Sxc1
- 2.Qd4#
- 2.Qe4#
- 1...Sxc3
- 2.Qd4#
- 1...exf5
- 2.Rxe2#
- 1...Sd4
- 2.Qxd4#
- 1...Ra4
- 2.Rxe2#
- 1...Rb5
- 2.Rxe2#
- 1...Rac5
- 2.Qe4#
- 1...Rd5
- 2.Rxe2#
- 1...Rcc5
- 2.Sd7#
- 2.Qe4#
- 1...Rb7
- 2.Sc6#
- 2.Rxe2#
- 1...Bg1
- 2.Qe4#
- 1...Bf4
- 2.Qe4#
- 1...Sg1
- 2.Qd4#
- 2.Qe4#
- 1...Sg3
- 2.Qd4#
- 1...Sf4
- 2.Qd4#
- 2.Qe4#
- 1...Rc4!
- threat
- 1.Rc6?
- threat
- 2.Qxa5#
- 2.Qe4#
- 1...Rxa3
- 2.Qc5#
- 2.Qe4#
- 2.Qb5#
- 1...Rxc6
- 2.Sxc6#
- 2.Sd7#
- 1...Sxc1
- 2.Qd4#
- 2.Qe4#
- 1...Sxc3
- 2.Qxc3#
- 1...exf5
- 2.Qxa5#
- 1...Ra4
- 2.Qc5#
- 2.Qb5#
- 1...Rb5
- 2.Qxb5#
- 1...Rc5
- 2.Qxc5#
- 2.Qe4#
- 1...Rd5
- 2.Qe4#
- 1...Ra6
- 2.Qc5#
- 2.Qe4#
- 2.Qb5#
- 1...Raa7
- 2.Qc5#
- 2.Qe4#
- 2.Qb5#
- 1...Ra8
- 2.Qc5#
- 2.Qe4#
- 2.Qb5#
- 1...Rca7
- 2.Qe4#
- 1...Rd7
- 2.Sxd7#
- 2.Qe4#
- 1...Bg1
- 2.Qe4#
- 1...Sg3
- 2.Bf4#
- 2.Qxa5#
- 2.Qd4#
- 2.Qf4#
- 1...Sd4
- 2.Qxd4#
- 2.cxd4#
- 1...Sf4
- 2.Qd4#
- 2.Qe4#
- 1...Rb7!
- threat
- 1.Qxa5+?
- 1...Rc5
- 2.Qxc5#
- 1...Kxd6!
- 1...Rc5
- 1.Sg6+?
- Keys
- 1.Rd3!
- threat
- 2.Re3#
- 2.Qe4#
- 1...Rxc3
- 2.Sd7#
- 2.Qe4#
- 1...Sxc3
- 2.Qd4#
- 1...exf5
- 2.Re3#
- 1...Ra4
- 2.Re3#
- 1...Rb5
- 2.Re3#
- 1...Rac5
- 2.Qe4#
- 1...Rd5
- 2.Re3#
- 1...Rc4
- 2.Sd7#
- 1...Rcc5
- 2.Sd7#
- 2.Qe4#
- 1...Rb7
- 2.Sc6#
- 2.Re3#
- 1...Bg1
- 2.Qe4#
- 1...Bf4
- 2.Qe4#
- 1...Sg3
- 2.Bf4#
- 2.Qd4#
- 2.Qf4#
- 1...Sd4
- 2.Qxd4#
- 2.cxd4#
- threat
- 1.Rd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 6
- REMOVED MATES = 8
- Sets
- R(g);N_GUARD,XP(E)::S(J)
- R(g);N_GUARD::S(J)
- R(g);N_GUARD,P_PINQ(F)::S(J)
- S(a);N_GUARD,XB(A)::QAB1(F)
- S(a);N_GUARD::QAB1(F)
- S(a);N_GUARD,XP(E)::QAB1(F)
- P(e);SBLOCK,XP(H)::S(G)
- P(h);SBLOCK,XR(I)::QAR1(F)
- Tries
- Try
- S(G);CHECK
- Vars
- K(d);P-FLIGHT,XP(H)::QAB1(F)
- Refutation
- P(i);XS(G)
- Try
- B(A);CHECK
- Vars
- S(a);XB(A)::QAB1(F)
- Refutation
- B(b);XB(A)
- Try
- R(I);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD,XP(E)::QAB1(F)
- P(e);XP(H)::R(I),XS(a)
- S(a);N_GUARD::QAB1(F),XS(a)
- R(c);::R(I),XS(a)
- R(c);P_PINQ(F)::R(I),XS(a)
- R(c);::QAR1(F)
- B(b);::QAR1(F)
- S(a);N_GUARD::QAB1(F)
- Refutation
- R(g);
- Try
- R(I);
- Threat
- DUALS(2)
- Vars
- S(a);OGATE,XP(E)::QAB(F),XS(a)
- P(e);XP(H)::QAR(F),XR(c)
- R(c);N_GUARD,P_PINQ(F)::QAR(F),XR(c)
- R(c);::QAR1(F)
- R(g);::QAR1(F)
- B(b);::QAR1(F)
- Refutation
- R(g);P_PINQ(F)
- Try
- Q(F);CHECK,XR(c)
- Vars
- R(g);N_GUARD,P_SPINR(g)::QAR2(F),XR(g)
- Refutation
- K(d);S_FLIGHT,XR(I)
- Try
- Actual
- R(I);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD,XP(E)::QAB1(F)
- P(e);XP(H)::R(I)
- R(c);::R(I)
- R(c);P_PINQ(F)::R(I)
- R(c);::QAR1(F)
- R(g);N_GUARD::S(J)
- B(b);::QAR1(F)
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).