MESON Chess Problem Database
Problem Display
PID: 16659 (8/3p1pp1/1K1Bn3/3kPQ2/6N1/1PP1p3/4r3/4n3 w - - 0 1)
Downer, GR
Chess, 1942
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Ra2
- 2.Sxe3#
- 1...Rb2
- 2.Sxe3#
- 1...Rc2
- 2.Sxe3#
- 1...Rd2
- 2.Sxe3#
- 1...Rf2
- 2.Sxe3#
- 1...Rg2
- 2.Sxe3#
- 1...Rh2
- 2.Sxe3#
- 1...Sc2
- 2.Qf3#
- 1...Sg2
- 2.Qf3#
- 1...Sd3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sd4
- 2.c4#
- 1...g5
- 2.Sf6#
- 1...g6
- 2.Sf6#
- 1...Ra2
- Tries
- 1.Ba3?
- 1...Ra2
- 2.Sxe3#
- 1...Rb2
- 2.Sxe3#
- 1...Rc2
- 2.Sxe3#
- 1...Rd2
- 2.Sxe3#
- 1...Rf2
- 2.Sxe3#
- 1...Rg2
- 2.Sxe3#
- 1...Rh2
- 2.Sxe3#
- 1...Sc2
- 2.Qf3#
- 1...Sg2
- 2.Qf3#
- 1...Sd3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sd4
- 2.c4#
- 1...Sf4
- 2.e6#
- 1...Sg5
- 2.e6#
- 1...Sc7
- 2.e6#
- 1...Sd8
- 2.e6#
- 1...Sf8
- 2.e6#
- 1...d6
- 2.exd6#
- 1...f6
- 2.exf6#
- 1...g5
- 2.Sf6#
- 1...g6
- 2.Sf6#
- 1...Sc5!
- 1...Ra2
- 1.Bb4?
- 1...Ra2
- 2.Sxe3#
- 1...Rb2
- 2.Sxe3#
- 1...Rc2
- 2.Sxe3#
- 1...Rd2
- 2.Sxe3#
- 1...Rf2
- 2.Sxe3#
- 1...Rg2
- 2.Sxe3#
- 1...Rh2
- 2.Sxe3#
- 1...Sc2
- 2.Qf3#
- 1...Sg2
- 2.Qf3#
- 1...Sd3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sd4
- 2.c4#
- 1...Sf4
- 2.e6#
- 1...Sg5
- 2.e6#
- 1...Sc7
- 2.e6#
- 1...Sd8
- 2.e6#
- 1...Sf8
- 2.e6#
- 1...d6
- 2.exd6#
- 1...f6
- 2.exf6#
- 1...g5
- 2.Sf6#
- 1...g6
- 2.Sf6#
- 1...Sc5!
- 1...Ra2
- 1.Bc5?
- threat
- 2.c4#
- 1...Rc2
- 2.Sxe3#
- 1...Sxc5!
- threat
- 1.Bc7?
- 1...Ra2
- 2.Sxe3#
- 1...Rb2
- 2.Sxe3#
- 1...Rc2
- 2.Sxe3#
- 1...Rd2
- 2.Sxe3#
- 1...Rf2
- 2.Sxe3#
- 1...Rg2
- 2.Sxe3#
- 1...Rh2
- 2.Sxe3#
- 1...Sc2
- 2.Qf3#
- 1...Sg2
- 2.Qf3#
- 1...Sd3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sd4
- 2.c4#
- 1...Sf4
- 2.e6#
- 1...Sc5
- 2.e6#
- 1...Sg5
- 2.e6#
- 1...Sd8
- 2.e6#
- 1...Sf8
- 2.e6#
- 1...d6
- 2.exd6#
- 1...f6
- 2.exf6#
- 1...g5
- 2.Sf6#
- 1...g6
- 2.Sf6#
- 1...Sxc7!
- 1...Ra2
- 1.Bb8?
- 1...Ra2
- 2.Sxe3#
- 1...Rb2
- 2.Sxe3#
- 1...Rc2
- 2.Sxe3#
- 1...Rd2
- 2.Sxe3#
- 1...Rf2
- 2.Sxe3#
- 1...Rg2
- 2.Sxe3#
- 1...Rh2
- 2.Sxe3#
- 1...Sc2
- 2.Qf3#
- 1...Sg2
- 2.Qf3#
- 1...Sd3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sd4
- 2.c4#
- 1...Sf4
- 2.e6#
- 1...Sc5
- 2.e6#
- 1...Sg5
- 2.e6#
- 1...Sd8
- 2.e6#
- 1...Sf8
- 2.e6#
- 1...d6
- 2.exd6#
- 1...f6
- 2.exf6#
- 1...g5
- 2.Sf6#
- 1...g6
- 2.Sf6#
- 1...Sc7!
- 1...Ra2
- 1.Bf8?
- 1...Ra2
- 2.Sxe3#
- 1...Rb2
- 2.Sxe3#
- 1...Rc2
- 2.Sxe3#
- 1...Rd2
- 2.Sxe3#
- 1...Rf2
- 2.Sxe3#
- 1...Rg2
- 2.Sxe3#
- 1...Rh2
- 2.Sxe3#
- 1...Sc2
- 2.Qf3#
- 1...Sg2
- 2.Qf3#
- 1...Sd3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sd4
- 2.c4#
- 1...Sf4
- 2.e6#
- 1...Sc5
- 2.e6#
- 1...Sg5
- 2.e6#
- 1...Sc7
- 2.e6#
- 1...Sd8
- 2.e6#
- 1...d6
- 2.exd6#
- 1...f6
- 2.exf6#
- 1...g5
- 2.Sf6#
- 1...g6
- 2.Sf6#
- 1...Sxf8!
- 1...Ra2
- 1.Ba3?
- Keys
- 1.Be7!
- 1...Ra2
- 2.Sxe3#
- 1...Rb2
- 2.Sxe3#
- 1...Rc2
- 2.Sxe3#
- 1...Rd2
- 2.Sxe3#
- 1...Rf2
- 2.Sxe3#
- 1...Rg2
- 2.Sxe3#
- 1...Rh2
- 2.Sxe3#
- 1...Sc2
- 2.Qf3#
- 1...Sg2
- 2.Qf3#
- 1...Sd3
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Sd4
- 2.c4#
- 1...Sf4
- 2.e6#
- 1...Sc5
- 2.e6#
- 1...Sg5
- 2.e6#
- 1...Sc7
- 2.e6#
- 1...Sd8
- 2.e6#
- 1...Sf8
- 2.e6#
- 1...d6
- 2.exd6#
- 1...f6
- 2.exf6#
- 1...g5
- 2.Sf6#
- 1...g6
- 2.Sf6#
- 1...Ra2
- 1.Be7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::S(C),XP(c)
- R(b);N_GUARD,P_PINP(A)::S(C),XP(c)
- S(a);N_GUARD::QAB(E)
- S(a);N_GUARD::QAB(E),XS(a)
- S(e);SBLOCK::P(B)
- P(h);N_GUARD::S(C)
- Tries
- Try
- B(G);
- Vars
- R(b);N_GUARD::S(C),XP(c)
- R(b);N_GUARD,P_PINP(A)::S(C),XP(c)
- S(a);N_GUARD::QAB(E)
- S(a);N_GUARD::QAB(E),XS(a)
- S(e);SBLOCK::P(B)
- S(e);OGATE::QAR(E)+P(D)
- P(f);OGATE::QAR(E)+P(D),XP(f)
- P(g);OGATE::QAR(E)+P(D),XP(g)
- P(h);N_GUARD::S(C)
- Refutation
- S(e);
- Try
- B(G);
- Vars
- R(b);N_GUARD::S(C),XP(c)
- S(a);N_GUARD::QAB(E)
- S(a);N_GUARD::QAB(E),XS(a)
- S(e);SBLOCK::P(B)
- S(e);OGATE::QAR(E)+P(D)
- P(f);OGATE::QAR(E)+P(D),XP(f)
- P(g);OGATE::QAR(E)+P(D),XP(g)
- P(h);N_GUARD::S(C)
- Refutation
- S(e);
- Try
- B(G);
- Threat
- P(B)
- Vars
- R(b);N_GUARD::S(C),XP(c)
- Refutation
- S(e);XB(G)
- Try
- B(G);
- Vars
- R(b);N_GUARD::S(C),XP(c)
- R(b);N_GUARD,P_PINP(A)::S(C),XP(c)
- S(a);N_GUARD::QAB(E)
- S(a);N_GUARD::QAB(E),XS(a)
- S(e);SBLOCK::P(B)
- S(e);OGATE::QAR(E)+P(D)
- P(f);OGATE::QAR(E)+P(D),XP(f)
- P(g);OGATE::QAR(E)+P(D),XP(g)
- P(h);N_GUARD::S(C)
- Refutation
- S(e);XB(G)
- Try
- B(G);
- Vars
- R(b);N_GUARD::S(C),XP(c)
- R(b);N_GUARD,P_PINP(A)::S(C),XP(c)
- S(a);N_GUARD::QAB(E)
- S(a);N_GUARD::QAB(E),XS(a)
- S(e);SBLOCK::P(B)
- S(e);OGATE::QAR(E)+P(D)
- P(f);OGATE::QAR(E)+P(D),XP(f)
- P(g);OGATE::QAR(E)+P(D),XP(g)
- P(h);N_GUARD::S(C)
- Refutation
- S(e);
- Try
- B(G);
- Vars
- R(b);N_GUARD::S(C),XP(c)
- R(b);N_GUARD,P_PINP(A)::S(C),XP(c)
- S(a);N_GUARD::QAB(E)
- S(a);N_GUARD::QAB(E),XS(a)
- S(e);SBLOCK::P(B)
- S(e);OGATE::QAR(E)+P(D)
- P(f);OGATE::QAR(E)+P(D),XP(f)
- P(g);OGATE::QAR(E)+P(D),XP(g)
- P(h);N_GUARD::S(C)
- Refutation
- S(e);XB(G)
- Try
- Actual
- B(G);
- Vars
- R(b);N_GUARD::S(C),XP(c)
- R(b);N_GUARD,P_PINP(A)::S(C),XP(c)
- S(a);N_GUARD::QAB(E)
- S(a);N_GUARD::QAB(E),XS(a)
- S(e);SBLOCK::P(B)
- S(e);OGATE::QAR(E)+P(D)
- P(f);OGATE::QAR(E)+P(D),XP(f)
- P(g);OGATE::QAR(E)+P(D),XP(g)
- P(h);N_GUARD::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).