MESON Chess Problem Database
Problem Display
PID: 42256 (4r3/N2Q1r2/b7/P1PP4/2kB2BR/1NPR2pK/2Pp2PP/4q3 w - - 0 1)
Johandl, Alois
2nd Prize, Revista de Sah, 1965
#2
15 + 7
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.Sxd2#
- 1...Qb1
- 2.Sxd2#
- 1...Qf1
- 2.Sxd2#
- 1...Qg1
- 2.Sxd2#
- 1...Qh1
- 2.Sxd2#
- 1...Qe4
- 2.Sxd2#
- 1...Qe5
- 2.Sxd2#
- 1...Qe6
- 2.Sxd2#
- 1...Qe7
- 2.Sxd2#
- 1...Qa1
- Tries
- 1.Be5?
- threat
- 2.Qa4#
- 1...Rxd7
- 2.Be2#
- 1...Qa1
- 2.Bf5#
- 1...Bb5
- 2.Qxb5#
- 1...Rb8!
- threat
- 1.Bf6?
- threat
- 2.Qa4#
- 1...Rb8
- 2.Be2#
- 1...Qa1
- 2.Be6#
- 1...Bb5
- 2.Qxb5#
- 1...Rxd7!
- threat
- 1.Be5?
- Keys
- 1.Be3!
- threat
- 2.Qa4#
- 1...Rxd7
- 2.Be6#
- 1...Rb8
- 2.Bf5#
- 1...Qa1
- 2.Sxd2#
- 1...Bb5
- 2.Qxb5#
- threat
- 1.Be3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 8
- Sets
- Q(a);N_GUARD::S(D),XP(b)
- Q(a);N_GUARD,P_PINP(B)::S(D),XP(b)
- Q(a);N_GUARD,P_PINP(C)::S(D),XP(b)
- Q(a);N_GUARD,P_PINB(I)::S(D),XP(b)
- Tries
- Try
- B(H);
- Threat
- QAR2(O)
- Vars
- R(f);N_GUARD,XQ(O)::R(J)+B(I)
- Q(a);N_GUARD::R(J)+B(I)
- B(e);N_GUARD::QAB1(O),XB(e)
- Refutation
- R(g);
- Try
- B(H);
- Threat
- QAR2(O)
- Vars
- R(g);N_GUARD::R(J)+B(I)
- Q(a);N_GUARD::R(J)+B(I)
- B(e);N_GUARD::QAB1(O),XB(e)
- Refutation
- R(f);XQ(O)
- Try
- Actual
- B(H);
- Threat
- QAR2(O)
- Vars
- R(f);N_GUARD,XQ(O)::R(J)+B(I)
- R(g);N_GUARD::R(J)+B(I)
- Q(a);N_GUARD::S(D),XP(b)
- B(e);N_GUARD::QAB1(O),XB(e)
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).