MESON Chess Problem Database
Problem Display
PID: 229304 (8/6p1/6n1/3p4/2PBk2n/3pP2B/QK6/5R2 w - - 0 1)
Perander, H
Tidskrift for Schack, 1911
#2
7 + 6
SOLUTION
- SOUND
- Sets
- 1...Sg2
- 2.Bxg2#
- 2.Bf5#
- 1...Sf5
- 2.Bg2#
- 2.Bxf5#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...d2
- 2.Qb1#
- 1...dxc4
- 2.Qa8#
- 1...Sg2
- Tries
- 1.Ka1?
- 1...dxc4
- 2.Qa8#
- 1...d2
- 2.Qb1#
- 2.Qc2#
- 1...Sg2
- 2.Bxg2#
- 2.Bf5#
- 2.Qxg2#
- 1...Sf5
- 2.Bg2#
- 2.Bxf5#
- 2.Qg2#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...Sf3!
- 1...dxc4
- 1.Kb1?
- 1...dxc4
- 2.Qa8#
- 1...d2
- 2.Qc2#
- 1...Sg2
- 2.Bxg2#
- 2.Bf5#
- 2.Qxg2#
- 1...Sf5
- 2.Bg2#
- 2.Bxf5#
- 2.Qg2#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...Sf3!
- 1...dxc4
- 1.Kc3?
- 1...dxc4
- 2.Qa8#
- 1...Sg2
- 2.Bxg2#
- 2.Bf5#
- 2.Qxg2#
- 1...Sf5
- 2.Bg2#
- 2.Bxf5#
- 2.Qg2#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...d2
- 2.Qb1#
- 2.Qc2#
- 1...Sf3!
- 1...dxc4
- 1.Bg4?
- 1...dxc4
- 2.Qa8#
- 1...d2
- 2.Qb1#
- 1...Sg2
- 2.Bf5#
- 1...Sf5
- 2.Bf3#
- 2.Bxf5#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...Sf3!
- 1...dxc4
- 1.Be6?
- threat
- 2.Bxd5#
- 1...dxc4
- 2.Qa8#
- 1...d2
- 2.Qb1#
- 1...Sf4
- 2.Rxf4#
- 1...Se7
- 2.Rf4#
- 1...Sf3!
- threat
- 1.Bd7?
- 1...dxc4
- 2.Bc6#
- 2.Qa8#
- 1...d2
- 2.Qb1#
- 1...Sg2
- 2.Bf5#
- 1...Sf5
- 2.Bxf5#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...Sf3!
- 1...dxc4
- 1.Bc8?
- 1...dxc4
- 2.Bb7#
- 2.Qa8#
- 1...d2
- 2.Qb1#
- 1...Sg2
- 2.Bf5#
- 1...Sf5
- 2.Bxf5#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...Sf3!
- 1...dxc4
- 1.Rf2?
- 1...dxc4
- 2.Qa8#
- 1...d2
- 2.Qb1#
- 1...Sg2
- 2.Bxg2#
- 2.Bf5#
- 1...Sf5
- 2.Bg2#
- 2.Bxf5#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...Sf3!
- 1...dxc4
- 1.Rf6?
- 1...dxc4
- 2.Qa8#
- 1...Sf5
- 2.Bg2#
- 1...Sf4
- 2.Rxf4#
- 1...d2
- 2.Qb1#
- 1...Sf3
- 2.Bf5#
- 1...Sg2
- 2.Bxg2#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...gxf6!
- 1...dxc4
- 1.Rf8?
- 1...dxc4
- 2.Qa8#
- 1...Sf5
- 2.Bg2#
- 1...Sf4
- 2.Rxf4#
- 1...d2
- 2.Qb1#
- 1...Sf3
- 2.Bf5#
- 1...Sg2
- 2.Bxg2#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...Sxf8!
- 1...dxc4
- 1.Qb3?
- 1...dxc4
- 2.Qb7#
- 1...Sg2
- 2.Bxg2#
- 2.Bf5#
- 1...Sf5
- 2.Bg2#
- 2.Bxf5#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...d2
- 2.Qc2#
- 1...Sf3!
- 1...dxc4
- 1.Qa1?
- 1...dxc4
- 2.Qa8#
- 1...d2
- 2.Qb1#
- 1...Sg2
- 2.Bxg2#
- 2.Bf5#
- 1...Sf5
- 2.Bg2#
- 2.Bxf5#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...Sf3!
- 1...dxc4
- 1.Qa4?
- 1...dxc4
- 2.Qc6#
- 2.Qa8#
- 1...d2
- 2.Qc2#
- 1...Sg2
- 2.Bxg2#
- 2.Bf5#
- 1...Sf5
- 2.Bg2#
- 2.Bxf5#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 2.Qe8#
- 1...Sf3!
- 1...dxc4
- 1.Qa5?
- threat
- 2.Qxd5#
- 1...dxc4
- 2.Qa8#
- 1...Sf4
- 2.Rxf4#
- 1...Se7
- 2.Rf4#
- 1...d2!
- threat
- 1.Qa6?
- 1...dxc4
- 2.Qb7#
- 2.Qc6#
- 2.Qa8#
- 1...Sf3
- 2.Qxg6#
- 1...Sg2
- 2.Bxg2#
- 2.Bf5#
- 2.Qxg6#
- 1...Sf5
- 2.Bg2#
- 2.Bxf5#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 2.Qe6#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 2.Qe6#
- 1...d2!
- 1...dxc4
- 1.Qa8?
- threat
- 2.Qxd5#
- 1...Sf4
- 2.Rxf4#
- 1...Se7
- 2.Rf4#
- 1...d2!
- threat
- 1.c5?
- 1...d2
- 2.Qb1#
- 1...Sg2
- 2.Bxg2#
- 2.Bf5#
- 1...Sf5
- 2.Bg2#
- 2.Bxf5#
- 1...Sf4
- 2.Rxf4#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...Sf3!
- 1...d2
- 1.Ka1?
- Keys
- 1.Rf7!
- 1...dxc4
- 2.Qa8#
- 1...Sf5
- 2.Bg2#
- 1...Sf4
- 2.Rxf4#
- 1...d2
- 2.Qb1#
- 1...Sf3
- 2.Bf5#
- 1...Sg2
- 2.Bxg2#
- 1...Se5
- 2.Rf4#
- 1...Se7
- 2.Rf4#
- 1...Sf8
- 2.Rf4#
- 1...Sh8
- 2.Rf4#
- 1...dxc4
- 1.Rf7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- P(a);OGATEB::QAB(B)
- P(d);OGATEB,XP(F)::QAB(B)
- Tries
- Try
- K(C);S_FLIGHT
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- K(C);P-FLIGHT
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- P(a);OGATEB::QAB(B)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- K(C);S_FLIGHT
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- B(E);
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- P(a);OGATEB::QAB(B)
- S(c);N_GUARD::B(E)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- B(E);
- Threat
- B(E),XP(d)
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- P(a);OGATEB::QAB(B)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- B(E);
- Vars
- P(a);OGATEB::QAB(B)
- S(c);N_GUARD::B(E)
- S(c);N_GUARD::B(E),XS(c)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- B(E);
- Vars
- P(a);OGATEB::QAB(B)
- S(c);N_GUARD::B(E)
- S(c);N_GUARD::B(E),XS(c)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- R(A);
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- P(a);OGATEB::QAB(B)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- R(A);
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- S(c);N_GUARD::B(E)
- S(e);N_GUARD::R1(A),XS(e)
- P(a);OGATEB::QAB(B)
- S(c);N_GUARD,SBLOCK::B(E)
- S(c);N_GUARD::B(E),XS(c)
- S(e);N_GUARD::R1(A)
- Refutation
- P(f);XR(A)
- Try
- R(A);
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- S(c);N_GUARD::B(E)
- S(e);N_GUARD::R1(A),XS(e)
- P(a);OGATEB::QAB(B)
- S(c);N_GUARD,SBLOCK::B(E)
- S(c);N_GUARD::B(E),XS(c)
- S(e);N_GUARD::R1(A)
- Refutation
- S(e);XR(A)
- Try
- Q(B);
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- P(a);OGATEB::QAB(B)
- Refutation
- S(c);
- Try
- Q(B);
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- P(a);OGATEB::QAB(B)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- Q(B);
- Vars
- P(a);OGATEB::QAB(B)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- Q(B);
- Threat
- QAB1(B),XP(d)
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- P(a);
- Try
- Q(B);
- Vars
- S(c);N_GUARD::QAB(B),XS(e)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- P(a);
- Try
- Q(B);P_PINP(d)
- Threat
- QAB1(B),XP(d)
- Vars
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- P(a);
- Try
- P(F);
- Vars
- P(a);OGATEB::QAB(B)
- S(e);N_GUARD::R1(A),XS(e)
- S(e);N_GUARD::R1(A)
- Refutation
- S(c);
- Try
- Actual
- R(A);
- Vars
- P(d);OGATEB,XP(F)::QAB(B)
- S(c);N_GUARD::B(E)
- S(e);N_GUARD::R1(A),XS(e)
- P(a);OGATEB::QAB(B)
- S(c);N_GUARD,SBLOCK::B(E)
- S(c);N_GUARD::B(E),XS(c)
- S(e);N_GUARD::R1(A)
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).