MESON Chess Problem Database
Problem Display
PID: 266449 (n2R3b/BBp5/2K2p2/R7/4k1p1/3N4/1p4PQ/2n2q2 w - - 0 1)
Hermanson, Halvar
Probleemblad, 1950
#2
8 + 9
SOLUTION
- SOUND
- Sets
- 1...Qe2
- 2.Qf4#
- 1...Qxg2
- 2.Qf4#
- 2.Qxg2#
- 1...Qxd3
- 2.Re8#
- 1...Qd1
- 2.Sf2#
- 2.Qf4#
- 1...Qe1
- 2.Qf4#
- 1...Qg1
- 2.Qf4#
- 1...Qh1
- 2.Sf2#
- 2.Qf4#
- 1...Qf2
- 2.Sxf2#
- 1...Qf4
- 2.Qxf4#
- 1...Qf5
- 2.Ra4#
- 1...Qe2
- Tries
- 1.Qd6?
- threat
- 2.Re8#
- 2.Qb4#
- 2.Qe7#
- 2.Qd4#
- 2.Qd5#
- 2.Qe6#
- 1...Qxg2
- 2.Qf4#
- 2.Qd5#
- 1...Qxd3
- 2.Re8#
- 1...Sxd3
- 2.Qd4#
- 1...Sb6
- 2.Re8#
- 2.Qe7#
- 2.Qd4#
- 2.Qe6#
- 1...b1Q
- 2.Re8#
- 2.Qe7#
- 2.Qd4#
- 2.Qd5#
- 2.Qe6#
- 1...b1R
- 2.Re8#
- 2.Qe7#
- 2.Qd4#
- 2.Qd5#
- 2.Qe6#
- 1...Se2
- 2.Re8#
- 2.Qe7#
- 2.Qd5#
- 2.Qe6#
- 1...Qe1
- 2.Re8#
- 2.Qf4#
- 2.Qe7#
- 2.Qd4#
- 2.Qd5#
- 2.Qe6#
- 1...Qg1
- 2.Re8#
- 2.Qf4#
- 2.Qe7#
- 2.Qd5#
- 2.Qe6#
- 1...Qf2
- 2.Sxf2#
- 2.Re8#
- 2.Qe7#
- 2.Qd5#
- 2.Qe6#
- 1...Qf4
- 2.Qb4#
- 2.Qxf4#
- 2.Qd4#
- 2.Qd5#
- 1...Qf5
- 2.Ra4#
- 2.Qb4#
- 2.Qd4#
- 1...Sa2
- 2.Re8#
- 2.Qe7#
- 2.Qd4#
- 2.Qd5#
- 2.Qe6#
- 1...Sb3
- 2.Re8#
- 2.Qe7#
- 2.Qd5#
- 2.Qe6#
- 1...f5
- 2.Qd5#
- 1...cxd6!
- threat
- 1.Qh6?
- threat
- 2.Rd4#
- 2.Qe3#
- 1...Qxg2
- 2.Qe3#
- 2.Qf4#
- 1...Qxd3
- 2.Re8#
- 1...Se2
- 2.Qe3#
- 1...Qe2
- 2.Rd4#
- 2.Qf4#
- 1...Qe1
- 2.Rd4#
- 2.Qf4#
- 1...Qg1
- 2.Qf4#
- 1...Qf2
- 2.Sxf2#
- 1...Qf3
- 2.Rd4#
- 1...Qf4
- 2.Qxf4#
- 1...Sb3
- 2.Qe3#
- 1...f5
- 2.Qe3#
- 1...Sb6!
- threat
- 1.Qh7+?
- 1...Qf5
- 2.Ra4#
- 2.Qxf5#
- 1...f5!
- 1...Qf5
- 1.Qd6?
- Keys
- 1.Qxc7!
- threat
- 2.Qe7#
- 1...Qxg2
- 2.Qf4#
- 1...Qxd3
- 2.Re8#
- 1...Sxd3
- 2.Kd7#
- 1...Sxc7
- 2.Kxc7#
- 1...Qf4
- 2.Qxf4#
- 1...Qf5
- 2.Ra4#
- 1...f5
- 2.Kb5#
- threat
- 1.Qxc7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 4
- Sets
- Q(b);N_GUARD::QAR1(B)
- Q(b);SBLOCK,XS(C)::R(H)
- Q(b);N_GUARD::S(C),XQ(b)
- Q(b);N_GUARD::QAR1(B),XQ(b)
- Q(b);SBLOCK::R(D)
- Tries
- Try
- Q(B);
- Threat
- DUALS(6)
- Vars
- Q(b);XS(C)::R(H)
- S(a);XS(C)::QAR1(B)
- P(f);::QAB1(B)
- Refutation
- P(g);XQ(B)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(b);SBLOCK,XS(C)::R(H)
- S(a);::QAR1(B)
- Q(b);N_GUARD::QAR1(B)
- Q(b);N_GUARD::S(C),XQ(b)
- Q(b);::R1(H)
- Q(b);N_GUARD::QAR1(B),XQ(b)
- P(f);::QAR1(B)
- Refutation
- S(h);
- Try
- Q(B);CHECK
- Refutation
- P(f);P_SPINP(f)
- Try
- Actual
- Q(B);XP(g)
- Threat
- QAR(B)
- Vars
- Q(b);N_GUARD,XP(A)::QAR1(B)
- Q(b);SBLOCK,XS(C)::R(H)
- S(a);SBLOCK,XS(C)::B(G)+K(E)
- S(h);XQ(B)::B(G)+K(E),XS(h)
- Q(b);N_GUARD::QAR1(B),XQ(b)
- Q(b);SBLOCK::R(D)
- P(f);SBLOCK::B(G)+K(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).