MESON Chess Problem Database
Problem Display
PID: 10 (8/2KN1p2/1p1p2Q1/3k1rp1/2R1n3/p1BB4/N1np3q/1b4b1 w - - 0 1)
Blake, Percy Francis
4th Comm., BCF 001. Ty., 1929-1930
#2
7 + 13
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Qxf5#
- 1...Qe2
- 2.Qxf5#
- 1...Qg2
- 2.Qxf5#
- 1...Qh4
- 2.Qxf5#
- 1...Qh5
- 2.Qxf5#
- 1...Qh6
- 2.Qxf5#
- 1...Rf1
- 2.Qxe4#
- 1...Rf2
- 2.Sxb6#
- 2.Qxe4#
- 1...Rf3
- 2.Qxe4#
- 1...Rf6
- 2.Qxe4#
- 1...Sa1
- 2.Sb4#
- 1...Se1
- 2.Sb4#
- 1...Se3
- 2.Sb4#
- 2.Sxb6#
- 2.Rd4#
- 1...Sb4
- 2.Sxb4#
- 1...Sd4
- 2.Sb4#
- 1...Sf2
- 2.Sxb6#
- 1...Sxc3
- 2.Sxc3#
- 1...Sg3
- 2.Qxd6#
- 1...Sc5
- 2.Sxb6#
- 1...Sf6
- 2.Qxf7#
- 1...f6
- 2.Qf7#
- 2.Qg8#
- 1...Qh1
- Tries
- 1.Sf6+?
- 1...Rxf6
- 2.Qxe4#
- 1...Sxf6
- 2.Qxf7#
- 1...Ke6!
- 1...Rxf6
- 1.Ra4?
- threat
- 2.Bc4#
- 2.Bxe4#
- 1...Bxa2
- 2.Bxe4#
- 1...Sxc3
- 2.Sxc3#
- 1...fxg6
- 2.Bc4#
- 1...Rf6
- 2.Bc4#
- 2.Qxe4#
- 1...Sf6
- 2.Qxf7#
- 1...f6
- 2.Bc4#
- 2.Qf7#
- 2.Qg8#
- 1...Qf4
- 2.Bc4#
- 1...Qe5
- 2.Bc4#
- 1...Qh1
- 2.Bc4#
- 2.Qxf5#
- 1...Qe2
- 2.Qxf5#
- 1...Qg2
- 2.Bc4#
- 2.Qxf5#
- 1...Qh4
- 2.Bc4#
- 2.Qxf5#
- 1...Rf4
- 2.Bc4#
- 1...Re5
- 2.Bc4#
- 1...Bd4
- 2.Bc4#
- 1...Sa1
- 2.Sb4#
- 2.Bc4#
- 1...Se1
- 2.Sb4#
- 2.Bc4#
- 1...Se3
- 2.Sb4#
- 2.Rd4#
- 1...Sb4
- 2.Sxb4#
- 1...Sd4
- 2.Sb4#
- 2.Bc4#
- 1...Sg3
- 2.Qxd6#
- 1...Sc5
- 2.Sxb6#
- 1...b5
- 2.Bxe4#
- 1...Sf2!
- threat
- 1.Rd4+?
- 1...Sxd4
- 2.Sb4#
- 1...Bxd4!
- 1...Sxd4
- 1.Sf6+?
- Keys
- 1.Rb4!
- threat
- 2.Bc4#
- 2.Bxe4#
- 1...Bxa2
- 2.Bxe4#
- 1...Sxb4
- 2.Sxb4#
- 1...Sxc3
- 2.Sxc3#
- 1...fxg6
- 2.Bc4#
- 1...Rf6
- 2.Bc4#
- 2.Qxe4#
- 1...Sf6
- 2.Qxf7#
- 1...f6
- 2.Bc4#
- 2.Qf7#
- 2.Qg8#
- 1...Qf4
- 2.Bc4#
- 1...Qe5
- 2.Bc4#
- 1...Qh1
- 2.Bc4#
- 2.Qxf5#
- 1...Qe2
- 2.Qxf5#
- 1...Qg2
- 2.Bc4#
- 2.Qxf5#
- 1...Qh4
- 2.Bc4#
- 2.Qxf5#
- 1...Rf4
- 2.Bc4#
- 1...Re5
- 2.Bc4#
- 1...Bd4
- 2.Bc4#
- 1...Sa1
- 2.Bc4#
- 1...Se1
- 2.Bc4#
- 1...Se3
- 2.Rd4#
- 1...Sd4
- 2.Bc4#
- 1...Sf2
- 2.Rb5#
- 1...Sg3
- 2.Qxd6#
- 1...Sc5
- 2.Sxb6#
- 1...b5
- 2.Bxe4#
- threat
- 1.Rb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 9
- REMOVED MATES = 8
- Sets
- Q(e);N_GUARD::QAR2(E),XR(i)
- R(i);OGATE::QAB1(E),XS(g)
- S(c);N_GUARD::S(A)
- S(c);N_GUARD::S(A),XS(c)
- S(g);S_CUTB(b)::S(G),XP(k)
- S(g);XB(B)::S(A),XS(g)
- S(g);N_GUARD,S_CUTQ(e)::QAR1(E),XP(l)
- S(g);S_CUTR(i)::QAB(E),XP(m)
- Tries
- Try
- S(G);CHECK
- Vars
- R(i);OGATE,XS(G)::QAB1(E),XS(g)
- S(g);XS(G)::QAB(E),XP(m)
- Refutation
- K(h);S_FLIGHT
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- B(a);XS(A)::B(C),XS(g)
- S(g);XB(B)::S(A),XS(g)
- P(m);XQ(E)::B(C)
- S(g);S_CUTR(i)::QAB(E),XP(m)
- Q(e);::B(C)
- Q(e);N_GUARD::QAR2(E),XR(i)
- R(i);::B(C)
- B(b);::B(C)
- S(c);N_GUARD::S(A),XS(c)
- S(g);N_GUARD,S_CUTQ(e)::QAR1(E),XP(l)
- S(g);SBLOCK,S_CUTB(b)::S(G),XP(k)
- P(k);::B(C),XS(g)
- Refutation
- S(g);
- Try
- R(D);CHECK
- Vars
- S(c);XR(D)::S(A)
- Refutation
- B(b);XR(D)
- Try
- Actual
- R(D);
- Threat
- DUALS(2)
- Vars
- B(a);XS(A)::B(C),XS(g)
- S(c);XR(D)::S(A),XS(c)
- S(g);XB(B)::S(A),XS(g)
- P(m);XQ(E)::B(C)
- S(g);S_CUTR(i)::QAB(E),XP(m)
- Q(e);::B(C)
- Q(e);N_GUARD::QAR2(E),XR(i)
- R(i);::B(C)
- B(b);::B(C)
- S(c);::B(C)
- S(c);N_GUARD,S_CUTB(b)::R1(D)
- S(g);N_GUARD,S_CUTB(b)::R(D)
- S(g);N_GUARD,S_CUTQ(e)::QAR1(E),XP(l)
- S(g);SBLOCK,S_CUTB(b)::S(G),XP(k)
- P(k);::B(C),XS(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).