MESON Chess Problem Database
Problem Display
PID: 48150 (4R2N/1pK1N2P/2n1k2r/3pP1p1/2b5/1QP3Bq/BR6/8 w - - 0 1)
Wirtanen, Erkki Aukusti
1st HM., Themes-64, 1957
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Qf5
- 2.Sxc6#
- 1...Bf1
- 2.Qxd5#
- 1...Be2
- 2.Qxd5#
- 1...Bd3
- 2.Qxd5#
- 1...Bb5
- 2.Qxd5#
- 1...Ba6
- 2.Qxd5#
- 1...d4
- 2.Qxc4#
- 1...Qf5
- Tries
- 1.Sf5+?
- 1...Se7
- 2.Sd4#
- 2.Sg7#
- 1...Kxf5!
- 1...Se7
- 1.Bb1?
- threat
- 2.Sxc6#
- 1...Sxe5
- 2.Sg8#
- 1...Sxe7
- 2.Qb6#
- 1...Qh5
- 2.Bf5#
- 1...Bd3
- 2.Qxd5#
- 1...Sb4
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sd4
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sa5
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sa7
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sb8
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sd8
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...d4
- 2.Qxc4#
- 1...Rxh7!
- threat
- 1.Rf2?
- threat
- 2.Sxc6#
- 1...Rxh7
- 2.Rf6#
- 1...Sxe5
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sxe7
- 2.Qb6#
- 1...Sb4
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sd4
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sa5
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sa7
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sb8
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sd8
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...d4
- 2.Qxc4#
- 1...Qh5!
- threat
- 1.Sf5+?
- Keys
- 1.Qc2!
- threat
- 2.Sxc6#
- 1...Rxh7
- 2.Qg6#
- 1...Sxe5
- 2.Sg8#
- 1...Sxe7
- 2.Rb6#
- 1...Qh5
- 2.Qf5#
- 1...Bd3
- 2.Bxd5#
- 1...Sb4
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sd4
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sa5
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sa7
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sb8
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...Sd8
- 2.Sf5#
- 2.Sc6#
- 2.Seg6#
- 2.Sc8#
- 2.Sg8#
- 1...d4
- 2.Bxc4#
- threat
- 1.Qc2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- Q(a);SBLOCK::R(J)+S(H),XS(e)
- B(b);OGATE,P_SPINP(c)::QAB1(C),XP(c)
- P(c);OGATEB,P_SPINB(b)::QAB(C),XB(b)
- Tries
- Try
- S(H);CHECK
- Refutation
- K(f);S_FLIGHT,XS(H)
- Try
- B(A);
- Threat
- R(J)+S(H),XS(e)
- Vars
- S(e);N_GUARD,XP(F)::R(J)+S(H)
- S(e);OGATEB,P_SPINS(e),XS(H)::QAR(C)
- Q(a);N_GUARD::B(A)
- B(b);OGATE,P_SPINP(c)::QAB1(C),XP(c)
- P(c);OGATEB,P_SPINB(b)::QAB(C),XB(b)
- Refutation
- R(g);P_PINS(H),XP(I)
- Try
- R(B);
- Threat
- R(J)+S(H),XS(e)
- Vars
- R(g);N_GUARD,P_PINS(H),XP(I)::R1(B)
- S(e);OGATEB,P_SPINS(e),XS(H)::QAR(C)
- P(c);OGATEB,P_SPINB(b)::QAB(C),XB(b)
- Refutation
- Q(a);
- Try
- Actual
- Q(C);
- Threat
- R(J)+S(H),XS(e)
- Vars
- R(g);N_GUARD,P_PINS(H),XP(I)::QAR2(C)
- S(e);N_GUARD,XP(F)::R(J)+S(H)
- S(e);OGATEB,P_SPINS(e),XS(H)::R(B)
- Q(a);N_GUARD::QAB1(C)
- B(b);OGATE,P_SPINP(c)::B(A),XP(c)
- P(c);OGATEB,P_SPINB(b)::B(A),XB(b)
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).