MESON Chess Problem Database
Problem Display
PID: 222342 (k5r1/2P5/Kp6/8/4N3/5N2/7B/7B w - - 0 1)
Ellerman, Arnoldo
US Problem Bulletin, 1964
#2
6 + 3
SOLUTION
- SOUND
- Sets
- 1...Rg1
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rg7
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rg1
- Tries
- 1.Se1?
- threat
- 2.Sg3#
- 2.Sg5#
- 1...Rg1
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.Sxg3#
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.Sd6#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8
- 2.Sf6#
- 1...Re8!
- threat
- 1.Sg1?
- threat
- 2.Sg3#
- 2.Sg5#
- 1...Rxg1
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.Sxg3#
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.Sd6#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8
- 2.Sf6#
- 1...Re8!
- threat
- 1.Sfd2?
- threat
- 2.Sg3#
- 2.Sg5#
- 1...Rg1
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.Sxg3#
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.Sd6#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8
- 2.Sf6#
- 1...Re8!
- threat
- 1.Sd4?
- threat
- 2.Sg3#
- 2.Sg5#
- 1...Rg1
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.Sxg3#
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.Sd6#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8
- 2.Sf6#
- 1...Re8!
- threat
- 1.Sh4?
- threat
- 2.Sg3#
- 2.Sg5#
- 1...Rg1
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.Sxg3#
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.Sd6#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8
- 2.Sf6#
- 1...Re8!
- threat
- 1.Se5?
- threat
- 2.Sg3#
- 2.Sg5#
- 1...Rg1
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.Sxg3#
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sg3#
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rd8
- 2.Sd6#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8
- 2.Sf6#
- 1...Rb8!
- threat
- 1.Sfg5?
- threat
- 2.Sd2#
- 2.Sf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sd6#
- 2.Sf6#
- 1...Rxg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.Sd6#
- 2.Sf6#
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.Sd6#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8
- 2.Sf6#
- 1...Re8!
- threat
- 1.Sed2?
- threat
- 2.Sg5#
- 1...Re8
- 2.Se5#
- 1...Rg1
- 2.Sxg1#
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8!
- threat
- 1.Sf2?
- threat
- 2.Sg5#
- 1...Re8
- 2.Se5#
- 1...Rg1
- 2.Sxg1#
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8!
- threat
- 1.Sc3?
- threat
- 2.Sg5#
- 1...Re8
- 2.Se5#
- 1...Rg1
- 2.Sxg1#
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8!
- threat
- 1.Sc5?
- threat
- 2.Sg5#
- 1...Re8
- 2.Se5#
- 1...Rg1
- 2.Sxg1#
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8!
- threat
- 1.Seg5?
- threat
- 2.Se1#
- 2.Sg1#
- 2.Sd2#
- 2.Sd4#
- 2.Sh4#
- 2.Se5#
- 1...Rxg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Re8
- 2.Se5#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.cxd8Q#
- 2.cxd8R#
- 1...Rf8!
- threat
- 1.Se1?
- Keys
- 1.Sf6!
- threat
- 2.Sg5#
- 1...Rg1
- 2.Sxg1#
- 2.c8Q#
- 2.c8R#
- 1...Rg2
- 2.c8Q#
- 2.c8R#
- 1...Rg3
- 2.c8Q#
- 2.c8R#
- 1...Rg4
- 2.c8Q#
- 2.c8R#
- 1...Rg5
- 2.Sxg5#
- 2.c8Q#
- 2.c8R#
- 1...Rb8
- 2.cxb8Q#
- 2.cxb8R#
- 1...Rd8
- 2.cxd8Q#
- 2.cxd8R#
- 1...Re8
- 2.Se5#
- threat
- 1.Sf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- R(c);N_GUARD::B(A)+S(D)
- Refutation
- R(c);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD,XS(C)::P=Q
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- R(c);N_GUARD::B(A)+S(D)
- Refutation
- R(c);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- R(c);N_GUARD::B(A)+S(D)
- Refutation
- R(c);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- R(c);N_GUARD::B(A)+S(D)
- Refutation
- R(c);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- R(c);N_GUARD::B(A)+S(D)
- Refutation
- R(c);
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD::P=Q
- R(c);N_GUARD::B(A)+S(D)
- Refutation
- R(c);
- Try
- S(C);
- Threat
- DUALS(7)
- Vars
- R(c);OGATE::PXR(c)=Q
- R(c);::B(A)+S(D)
- Refutation
- R(c);
- Try
- S(D);
- Threat
- B(A)+S(C)
- Vars
- R(c);N_GUARD::B(A)+S(C)
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- Refutation
- R(c);
- Try
- S(D);
- Threat
- B(A)+S(C)
- Vars
- R(c);N_GUARD::B(A)+S(C)
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- Refutation
- R(c);
- Try
- S(D);
- Threat
- B(A)+S(C)
- Vars
- R(c);N_GUARD::B(A)+S(C)
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- Refutation
- R(c);
- Try
- S(D);
- Threat
- B(A)+S(C)
- Vars
- R(c);N_GUARD::B(A)+S(C)
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- Refutation
- R(c);
- Try
- S(D);
- Threat
- DUALS(6)
- Vars
- R(c);::B(A)+S(C)
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- Refutation
- R(c);
- Try
- Actual
- S(D);
- Threat
- B(A)+S(C)
- Vars
- R(c);N_GUARD::P=Q
- R(c);OGATE::PXR(c)=Q
- R(c);N_GUARD::B(A)+S(C)
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).