MESON Chess Problem Database
Problem Display
PID: 64733 (1B4nq/3b1PQB/1p1N1p2/3Pkn1R/2PpNp2/r3p2K/3PRP2/8 w - - 0 1)
Hassberg, Eric Manfred
Chess, 1947
#2
13 + 11
SOLUTION
- SOUND
- Sets
- 1...Ba4
- 2.Rxf5#
- 1...Bb5
- 2.Rxf5#
- 1...Bc6
- 2.Rxf5#
- 1...Be8
- 2.Rxf5#
- 1...exd2+
- 2.Sc3#
- 1...exf2+
- 2.Sc3#
- 1...f3
- 2.Qg3#
- 1...Ba4
- Tries
- 1.Sg3?
- threat
- 2.Sde4#
- 2.Sb5#
- 2.Sdxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 1...fxg3
- 2.Qxg3#
- 1...d3
- 2.Sb5#
- 2.Sdxf5#
- 1...Ra7
- 2.Sb7#
- 1...Bb5
- 2.Sde4#
- 2.Sxb5#
- 2.Sdxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 2.Rxf5#
- 1...Bc8
- 2.Sde4#
- 2.Sb5#
- 2.Sdxf5#
- 2.Sb7#
- 2.Sxc8#
- 2.Se8#
- 1...Be8
- 2.Sde4#
- 2.Sb5#
- 2.Sdxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sxe8#
- 2.Rxf5#
- 1...Sh6
- 2.Sc8#
- 2.Se8#
- 1...Se7
- 2.Sc8#
- 2.Se8#
- 1...b5
- 2.Sde4#
- 2.Sxb5#
- 2.Sdxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 1...Ra8!
- threat
- 1.Sc5?
- threat
- 2.Sxd7#
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sdb7#
- 2.Sc8#
- 2.Se8#
- 1...d3
- 2.Sb5#
- 2.Sxf5#
- 1...f3
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sdb7#
- 2.Sc8#
- 2.Se8#
- 2.Qg3#
- 1...Ra7
- 2.Sd3#
- 2.Sdb7#
- 1...Ra8
- 2.Sd3#
- 2.Sxd7#
- 1...Ba4
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sdb7#
- 2.Sc8#
- 2.Se8#
- 2.Rxf5#
- 1...Bb5
- 2.Sde4#
- 2.Sxb5#
- 2.Sxf5#
- 2.Sdb7#
- 2.Sc8#
- 2.Se8#
- 2.Rxf5#
- 1...Bc6
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sdb7#
- 2.Sc8#
- 2.Se8#
- 2.Rxf5#
- 1...Be6
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sdb7#
- 2.Sc8#
- 2.Se8#
- 1...Bc8
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sdb7#
- 2.Sxc8#
- 2.Se8#
- 1...Be8
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sdb7#
- 2.Sc8#
- 2.Sxe8#
- 2.Rxf5#
- 1...Sh6
- 2.Sxd7#
- 2.Sc8#
- 2.Se8#
- 1...Se7
- 2.Sxd7#
- 2.Sc8#
- 2.Se8#
- 1...b5
- 2.Sxd7#
- 2.Sde4#
- 2.Sxb5#
- 2.Sxf5#
- 2.Sdb7#
- 2.Sc8#
- 2.Se8#
- 1...bxc5!
- threat
- 1.Sxf6?
- threat
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 2.Sg4#
- 2.Sxd7#
- 1...Qxg7
- 2.Sde4#
- 2.Sde8#
- 2.Sxd7#
- 1...d3
- 2.Sb5#
- 2.Sxf5#
- 2.Sg4#
- 2.Sxd7#
- 1...f3
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 1...Ra7
- 2.Sb7#
- 2.Sg4#
- 2.Sxd7#
- 1...Ra8
- 2.Sg4#
- 2.Sxd7#
- 1...Ba4
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 2.Sg4#
- 2.Sd7#
- 2.Rxf5#
- 1...Bb5
- 2.Sde4#
- 2.Sxb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 2.Sg4#
- 2.Sd7#
- 2.Rxf5#
- 1...Bc6
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 2.Sg4#
- 2.Sd7#
- 2.Rxf5#
- 1...Be6
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 2.Sg4#
- 2.Sd7#
- 1...Bc8
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sxc8#
- 2.Sde8#
- 2.Sg4#
- 2.Sd7#
- 1...Be8
- 2.Sde4#
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sdxe8#
- 2.Sg4#
- 2.Sd7#
- 2.Rxf5#
- 1...Sh6
- 2.Sc8#
- 2.Sde8#
- 2.Sg4#
- 2.Sxd7#
- 1...Se7
- 2.Sc8#
- 2.Sde8#
- 2.Sg4#
- 2.Sxd7#
- 1...b5
- 2.Sde4#
- 2.Sxb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sde8#
- 2.Sg4#
- 2.Sxd7#
- 1...Sxf6!
- threat
- 1.Qg2?
- threat
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 1...exd2+
- 2.Sc3#
- 1...exf2+
- 2.Sc3#
- 1...d3
- 2.Sb5#
- 2.Sxf5#
- 1...f3
- 2.Qh2#
- 2.Qg3#
- 1...Ra7
- 2.Sb7#
- 1...Bb5
- 2.Sxb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 2.Rxf5#
- 1...Bc8
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sxc8#
- 2.Se8#
- 1...Be8
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sxe8#
- 2.Rxf5#
- 1...Sh6
- 2.Sc8#
- 2.Se8#
- 1...Se7
- 2.Sc8#
- 2.Se8#
- 1...b5
- 2.Sxb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 1...Ra8!
- threat
- 1.f3?
- threat
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 1...d3
- 2.Sb5#
- 2.Sxf5#
- 1...Ra7
- 2.Sb7#
- 1...Bb5
- 2.Sxb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 2.Rxf5#
- 1...Bc8
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sxc8#
- 2.Se8#
- 1...Be8
- 2.Sb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Sxe8#
- 2.Rxf5#
- 1...Sh6
- 2.Sc8#
- 2.Se8#
- 1...Se7
- 2.Sc8#
- 2.Se8#
- 1...b5
- 2.Sxb5#
- 2.Sxf5#
- 2.Sb7#
- 2.Sc8#
- 2.Se8#
- 1...Ra8!
- threat
- 1.Sg3?
- Keys
- 1.Sg5!
- threat
- 2.Sf3#
- 2.Sxf5#
- 1...Sg3+
- 2.Sf5#
- 1...Sh4+
- 2.Sf5#
- 1...Sxd6+
- 2.Se6#
- 1...Sfh6+
- 2.Sf5#
- 1...Sfe7+
- 2.Sf5#
- 1...Sxg7+
- 2.Sf5#
- 1...Qxh7
- 2.Sf3#
- 1...f3
- 2.Sxf5#
- 1...Ra7
- 2.Sf3#
- 1...Ra8
- 2.Sf3#
- 1...Sgh6
- 2.Sf3#
- 1...Sge7
- 2.Sf3#
- threat
- 1.Sg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 11
- REMOVED MATES = 6
- Sets
- B(i);N_GUARD::R1(H),XS(f)
- P(b);CHECK,XP(A)::R(B)+S(F)
- P(b);CHECK,XP(C)::R(B)+S(F)
- P(d);OGATEB::QAB(K)
- Tries
- Try
- S(F);N_PINP(h),P_PINP(b)
- Threat
- DUALS(6)
- Vars
- P(d);OGATE,XS(F)::QAB(K),XP(d)
- R(a);::B(M)+S(I)
- Refutation
- R(a);
- Try
- S(F);N_PINP(h),P_PINP(b)
- Threat
- DUALS(7)
- Refutation
- P(g);XS(F)
- Try
- S(F);P_PINP(b),XP(h)
- Threat
- DUALS(8)
- Refutation
- S(j);XS(F)
- Try
- Q(K);N_PINP(h)
- Threat
- DUALS(5)
- Vars
- P(b);CHECK,XP(A)::R(B)+S(F)
- P(b);CHECK,XP(C)::R(B)+S(F)
- R(a);::B(M)+S(I)
- Refutation
- R(a);
- Try
- P(C);
- Threat
- DUALS(5)
- Vars
- R(a);::B(M)+S(I)
- Refutation
- R(a);
- Try
- Actual
- S(F);N_PINP(h),N_PINS(f),P_PINP(b)
- Threat
- DUALS(2)
- Vars
- S(f);CHECK::B(M)+S(I)
- S(f);CHECK,P_SPINS(f),XS(I)::R(H)+S(F)
- S(f);CHECK,XQ(K)::B(M)+S(I)
- Q(k);P_PINR(H),XB(L)::S(F)
- P(d);::B(M)+S(I),XS(f)
- R(a);::S(F)
- S(j);::S(F)
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).