MESON Chess Problem Database
Problem Display
PID: 231738 (8/3Np3/4k1P1/p1P3p1/B3P3/2PN1p2/3p4/2nQ1K2 w - - 0 1)
Torngren, Pehr Hendrik
Die Schwalbe, 1929
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sxd3
- 2.Qb3#
- 1...f2
- 2.Qg4#
- 1...g4
- 2.Sf4#
- 1...Sa2
- Tries
- 1.Kf2?
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...g4
- 2.Sf4#
- 1...Sxd3+!
- 1...Sa2
- 1.Sb2?
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd3
- 2.Qb3#
- 1...f2
- 2.Qg4#
- 1...g4!
- 1...Sa2
- 1.Sf2?
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd3
- 2.Qb3#
- 1...g4!
- 1...Sa2
- 1.S3e5?
- 1...Sa2
- 2.Bb3#
- 2.Qb3#
- 1...Se2
- 2.Bb3#
- 2.Qb3#
- 1...Sb3
- 2.Bxb3#
- 2.Qxb3#
- 1...Sd3
- 2.Bb3#
- 2.Qb3#
- 1...f2
- 2.Qg4#
- 1...g4!
- 1...Sa2
- 1.Bb5?
- 1...Sxd3
- 2.Qb3#
- 1...g4
- 2.Sf4#
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...f2
- 2.Qg4#
- 1...a4!
- 1...Sxd3
- 1.Bc6?
- 1...Sxd3
- 2.Qb3#
- 1...g4
- 2.Sf4#
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...f2
- 2.Qg4#
- 1...a4!
- 1...Sxd3
- 1.g7?
- threat
- 2.g8Q#
- 2.g8B#
- 1...Sxd3
- 2.Qb3#
- 2.g8Q#
- 2.g8B#
- 1...g4
- 2.g8Q#
- 2.g8B#
- 1...Sa2
- 2.Qb3#
- 2.g8Q#
- 2.g8B#
- 1...Se2
- 2.Qb3#
- 2.g8Q#
- 2.g8B#
- 1...Sb3
- 2.Qxb3#
- 2.g8Q#
- 2.g8B#
- 1...f2
- 2.g8Q#
- 2.g8B#
- 1...Kf7!
- threat
- 1.Kf2?
- Keys
- 1.Sxc1!
- threat
- 2.Qb3#
- 1...dxc1Q
- 2.Bb3#
- 1...dxc1S
- 2.Qd5#
- 1...dxc1R
- 2.Bb3#
- threat
- 1.Sxc1!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(a);N_GUARD,XS(D)::QAB(A)
- P(c);OGATE::QAB(A)
- P(e);N_GUARD::S(D)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(e);N_GUARD::S(D)
- Refutation
- S(a);CHECK,XS(D)
- Try
- S(D);
- Vars
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(c);OGATE::QAB(A)
- Refutation
- P(e);
- Try
- S(D);
- Vars
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- Refutation
- P(e);
- Try
- S(D);
- Vars
- P(c);OGATE::QAB(A)
- Refutation
- P(e);
- Try
- B(E);
- Vars
- S(a);N_GUARD,XS(D)::QAB(A)
- P(e);N_GUARD::S(D)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(c);OGATE::QAB(A)
- Refutation
- P(d);
- Try
- B(E);
- Vars
- S(a);N_GUARD,XS(D)::QAB(A)
- P(e);N_GUARD::S(D)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(c);OGATE::QAB(A)
- Refutation
- P(d);
- Try
- P(H);
- Threat
- P=Q
- Vars
- P(e);::P=Q
- P(c);::P=Q
- Refutation
- K(f);S_FLIGHT
- Try
- Actual
- S(D);XS(a)
- Threat
- QAB(A)
- Vars
- P(b);P_PINQ(A),XS(D)::B(E)
- P(b);OGATE,XS(D)::QAB1(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).