MESON Chess Problem Database
Problem Display
PID: 186061 (R7/3Bp3/3p2p1/1K1k2P1/2p2pN1/2PP3n/6N1/8 w - - 0 1)
Howard, David M
Problem Observer, 2017
#2
8 + 7
SOLUTION
- SOUND
- Sets
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...Sxg5
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...Sg1
- Tries
- 1.Sf6+?
- 1...Ke5
- 2.d4#
- 1...exf6!
- 1...Ke5
- 1.Bc8?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bb7#
- 1...cxd3!
- 1...Sxg5
- 1.Ra1?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Ra2?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Ra3?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Ra6?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Ra7?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Rb8?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Rc8?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Rd8?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Re8?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 2.Bc6#
- 2.Be6#
- 1...e6
- 2.Bc6#
- 2.Bxe6#
- 1...cxd3!
- 1...Sxg5
- 1.Rf8?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Rg8?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Rh8?
- 1...Sxg5
- 2.Sxf4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...cxd3!
- 1...Sxg5
- 1.Sf6+?
- Keys
- 1.Ra4!
- 1...Sxg5
- 2.Sxf4#
- 1...cxd3
- 2.Rd4#
- 1...Sg1
- 2.Sxf4#
- 1...Sf2
- 2.Sxf4#
- 1...f3
- 2.S2e3#
- 1...e5
- 2.Sf6#
- 1...e6
- 2.Bc6#
- 1...Sxg5
- 1.Ra4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::S(A),XP(c)
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Tries
- Try
- S(D);CHECK
- Vars
- K(d);P-FLIGHT::P(C)
- Refutation
- P(g);XS(D)
- Try
- B(G);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
- Refutation
- P(b);XP(C)
- Try
- Actual
- R(H);
- Vars
- S(a);N_GUARD,XP(F)::S(A),XP(c)
- P(b);OGATE,XP(C)::R1(H)
- S(a);N_GUARD::S(A),XP(c)
- P(c);N_GUARD::S(A)
- P(g);N_GUARD,SBLOCK::S(D)
- P(g);SBLOCK::B(G)
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).