MESON Chess Problem Database
Problem Display
PID: 70417 (3K1N2/pp3Pp1/1r1k3N/BR3Ppb/7p/4P3/n7/1R3rQB w - - 0 1)
Fillery, William Edmund Frank
Chess, 1950
#2
11 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxb1
- 2.Qh2#
- 1...Rc1
- 2.Qh2#
- 1...Rd1
- 2.Qh2#
- 1...Re1
- 2.Qh2#
- 1...Rxf5
- 2.Sxf5#
- 1...Ra6
- 2.Bc7#
- 1...Rc6
- 2.Rd5#
- 1...Bxf7
- 2.Sxf7#
- 1...Sc1
- 2.Bb4#
- 1...Sc3
- 2.Bb4#
- 1...Sb4
- 2.Bxb4#
- 1...Rxb1
- Tries
- 1.Rd1+?
- 1...Rxd1
- 2.Qh2#
- 1...Bxd1!
- 1...Rxd1
- 1.Rd1+?
- Keys
- 1.Rc1!
- threat
- 2.Rd5#
- 1...Rxc1
- 2.Qh2#
- 1...Rxf5
- 2.Sxf5#
- 1...Rxb5
- 2.Bc7#
- 1...Bxf7
- 2.Sxf7#
- 1...Sxc1
- 2.Bb4#
- 1...Rd1
- 2.Qh2#
- 1...Rf3
- 2.Qd1#
- 1...Bf3
- 2.Qh2#
- 1...Sc3
- 2.Bb4#
- 1...Sb4
- 2.Bxb4#
- threat
- 1.Rc1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- R(a);N_GUARD,XR(A)::QAB(B)
- R(a);N_GUARD::QAB(B)
- R(a);XP(G)::S(H),XR(a)
- R(f);OGATE::B(E)
- R(f);SBLOCK::R1(F)
- B(e);XP(I)::S(H),XB(e)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
- Tries
- Try
- R(A);CHECK
- Vars
- R(a);XR(A)::QAB(B)
- Refutation
- B(e);XR(A)
- Try
- Actual
- R(A);
- Threat
- R1(F)
- Vars
- R(a);N_GUARD,XR(A)::QAB(B)
- R(a);XP(G)::S(H),XR(a)
- R(f);OGATE,XR(F)::B(E)
- B(e);XP(I)::S(H),XB(e)
- S(b);N_GUARD,XR(A)::B(E)
- R(a);N_GUARD::QAB(B)
- R(a);OGATE::QAR(B)
- B(e);S_CUTR(a)::QAB(B)
- S(b);N_GUARD::B(E)
- S(b);N_GUARD::B(E),XS(b)
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).