MESON Chess Problem Database
Problem Display
PID: 258070 (8/3p2n1/nRb1kB1N/2Pp2Pp/r7/3NPQ1P/8/b6K w - - 0 1)
Seidemann, Felix
Die Schwalbe, 1931
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Ra2
- 2.Sf4#
- 1...Ra3
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Ra5
- 2.Sf4#
- 1...Bd4
- 2.Sf4#
- 1...Bxf6
- 2.Qxf6#
- 1...Sb4
- 2.Sf4#
- 1...Sf5
- 2.Qxf5#
- 1...Se8
- 2.Qf5#
- 1...d4
- 2.Sf4#
- 2.Qe4#
- 1...Ra2
- Tries
- 1.Rxc6+?
- 1...d6
- 2.Rxd6#
- 1...dxc6!
- 1...d6
- 1.Qe4+?
- 1...Be5
- 2.Sf4#
- 2.Qxe5#
- 1...dxe4
- 2.Sf4#
- 1...Rxe4!
- 1...Be5
- 1.Rxc6+?
- Keys
- 1.Qf4!
- threat
- 2.Qd6#
- 1...d4+
- 2.Qe4#
- 1...Rxf4
- 2.Sxf4#
- 1...Sxc5
- 2.Sxc5#
- 1...d6
- 2.Qxd6#
- 1...Be5
- 2.Qxe5#
- 1...Sf5
- 2.Qxf5#
- 1...Se8
- 2.Qf5#
- threat
- 1.Qf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 6
- Sets
- R(b);N_GUARD::S(B)
- R(b);N_GUARD::S(B),XR(b)
- B(a);S_CUTR(b)::S(B)
- B(a);OGATE,XB(I)::QAR1(D),XB(a)
- S(e);S_CUTR(b)::S(B)
- S(i);N_GUARD::QAB1(D),XS(i)
- S(i);N_GUARD::QAB1(D)
- Tries
- Try
- R(H);CHECK,XB(f)
- Vars
- P(h);P_SPINP(h)::R1(H),XP(h)
- Refutation
- P(h);XR(H)
- Try
- Q(D);CHECK
- Vars
- P(c);XQ(D)::S(B)
- Refutation
- R(b);XQ(D)
- Try
- Actual
- Q(D);
- Threat
- QAR1(D)
- Vars
- P(c);CHECK,N_GUARD,S_CUTB(a),S_CUTR(b)::QAR2(D)
- R(b);XQ(D)::S(B),XR(b)
- S(e);XP(F)::S(B),XS(e)
- P(h);N_SPINB(f)::QAR1(D),XP(h)
- B(a);N_GUARD::QAR1(D),XB(a)
- S(i);N_GUARD::QAB1(D),XS(i)
- S(i);N_GUARD::QAB1(D)
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).