MESON Chess Problem Database
Problem Display
PID: 220394 (8/8/8/4nK2/5R2/3pk3/3p4/3Q4 w - - 0 1)
Torngren, Pehr Hendrik
Die Schwalbe, 1928
#2
3 + 4
SOLUTION
- SOUND
- Sets
- 1...Sf3
- 2.Qxf3#
- 1...Sc4
- 2.Qf3#
- 1...Sg4
- 2.Qf3#
- 1...Sc6
- 2.Qf3#
- 1...Sg6
- 2.Qf3#
- 1...Sd7
- 2.Qf3#
- 1...Sf7
- 2.Qf3#
- 1...Sf3
- Tries
- 1.Kg5?
- 1...Sf3+
- 2.Qxf3#
- 1...Sc4
- 2.Qf3#
- 1...Sg4
- 2.Qf3#
- 1...Sc6
- 2.Qf3#
- 1...Sg6
- 2.Qf3#
- 1...Sd7
- 2.Qf3#
- 1...Sf7+!
- 1...Sf3+
- 1.Ke6?
- 1...Sf3
- 2.Qxf3#
- 1...Sc4
- 2.Qf3#
- 1...Sg4
- 2.Qf3#
- 1...Sc6
- 2.Qf3#
- 1...Sg6
- 2.Qf3#
- 1...Sd7
- 2.Qf3#
- 1...Sf7
- 2.Qf3#
- 1...Kxf4!
- 1...Sf3
- 1.Kg5?
- Keys
- 1.Qf1!
- threat
- 2.Re4#
- 2.Qf2#
- 1...d1Q
- 2.Qf2#
- 1...d1S
- 2.Qe1#
- 1...d1B
- 2.Qf2#
- 1...d1R
- 2.Qf2#
- 1...Sf3
- 2.Re4#
- 2.Qxf3#
- 1...Sg4
- 2.Re4#
- 2.Qf3#
- threat
- 1.Qf1!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 7
- Sets
- S(d);N_GUARD::QAR1(A),XS(d)
- S(d);N_GUARD::QAR1(A)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- S(d);CHECK,N_GUARD::QAR1(A),XS(d)
- S(d);N_GUARD::QAR1(A)
- Refutation
- S(d);CHECK
- Try
- K(C);S_FLIGHT
- Vars
- S(d);N_GUARD::QAR1(A),XS(d)
- S(d);N_GUARD::QAR1(A)
- Refutation
- K(c);S_FLIGHT,XR(B)
- Try
- Actual
- Q(A);
- Threat
- DUALS(2)
- Vars
- P(a);::QAB1(A)
- P(a);N_GUARD::QAR2(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).