MESON Chess Problem Database
Problem Display
PID: 203038 (2N1R3/1p5r/6r1/1KPk2P1/2p5/1P2p2B/bB2p1Nb/4Q1qn w - - 0 1)
Fillery, William Edmund Frank
The Problemist, 1983
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxe1
- 2.Sxe3#
- 1...Qf1
- 2.Sxe3#
- 1...Qxg2
- 2.Bxg2#
- 1...Rxg5
- 2.Sb6#
- 1...Rb6+
- 2.Sxb6#
- 1...Rgg7
- 2.Sb6#
- 1...Rg8
- 2.Sb6#
- 1...Bb1
- 2.bxc4#
- 1...Bf4
- 2.Sxf4#
- 1...Be5
- 2.Rxe5#
- 1...Bd6
- 2.Sb6#
- 1...Sf2
- 2.Sxe3#
- 1...Sg3
- 2.Sf4#
- 2.Re5#
- 1...Qxe1
- Tries
- 1.Qc3?
- threat
- 2.Qd4#
- 2.Qxc4#
- 1...Rb6+
- 2.Sxb6#
- 1...Bxb3
- 2.Qd4#
- 1...cxb3
- 2.Qd4#
- 2.Qd3#
- 2.Qc4#
- 1...Be5
- 2.Rxe5#
- 2.Qxe5#
- 2.Qxc4#
- 1...Qc1
- 2.Qd4#
- 1...Qd1
- 2.Sxe3#
- 2.Qxc4#
- 1...Rh4!
- threat
- 1.Qh4?
- threat
- 2.Qxc4#
- 2.Qd4#
- 2.Qe4#
- 1...Rb6+
- 2.Sxb6#
- 1...Qxg2
- 2.Bxg2#
- 2.Qxc4#
- 2.Qd4#
- 1...Bxb3
- 2.Qd4#
- 2.Qe4#
- 1...cxb3
- 2.Qc4#
- 2.Qd4#
- 2.Qe4#
- 1...Qb1
- 2.Sxe3#
- 2.Qxc4#
- 2.Qd4#
- 1...Qc1
- 2.Qd4#
- 2.Qe4#
- 1...Qd1
- 2.Sxe3#
- 2.Qxc4#
- 2.Qe4#
- 1...Re6
- 2.Bxe6#
- 2.Qxc4#
- 2.Qd4#
- 1...Re7
- 2.Sxe7#
- 2.Qxc4#
- 2.Qd4#
- 1...Bb1
- 2.Qxc4#
- 2.Qd4#
- 2.bxc4#
- 1...Bf4
- 2.Sxf4#
- 1...Be5
- 2.Rxe5#
- 2.Qxc4#
- 1...Sf2
- 2.Sxe3#
- 2.Qxc4#
- 2.Qd4#
- 1...Sg3
- 2.Sf4#
- 2.Re5#
- 2.Qxc4#
- 2.Qd4#
- 1...c3
- 2.Qc4#
- 2.Qe4#
- 1...Rxh4!
- threat
- 1.Qxe2?
- threat
- 2.Qf3#
- 2.Qxc4#
- 1...Rb6+
- 2.Sxb6#
- 1...Qxg2
- 2.Bxg2#
- 2.Qxc4#
- 2.Qxg2#
- 1...Rxh3
- 2.Qxc4#
- 1...Bxb3
- 2.Qf3#
- 1...cxb3
- 2.Qd3#
- 2.Qf3#
- 2.Qc4#
- 1...Re6
- 2.Qxc4#
- 1...Re7
- 2.Qxc4#
- 1...c3
- 2.Qd3#
- 2.Qc4#
- 1...Qf2
- 2.Qxc4#
- 1...Qb1
- 2.Sxe3#
- 2.Qxc4#
- 1...Qc1
- 2.Qf3#
- 1...Qd1
- 2.Sxe3#
- 2.Qxd1#
- 2.Qxc4#
- 1...Qf1
- 2.Sxe3#
- 1...Rf6
- 2.Qxc4#
- 1...Rf7
- 2.Qxc4#
- 1...Bb1
- 2.Qxc4#
- 2.bxc4#
- 1...Sf2
- 2.Sxe3#
- 2.Qxc4#
- 1...Sg3
- 2.Sf4#
- 2.Re5#
- 2.Qxc4#
- 1...Rh4!
- threat
- 1.Qc3?
- Keys
- 1.Qb1!
- threat
- 2.Qe4#
- 1...Rb6+
- 2.Sxb6#
- 1...Qxb1
- 2.Sxe3#
- 1...Qxg2
- 2.Bxg2#
- 1...Bxb1
- 2.bxc4#
- 1...Re6
- 2.Bxe6#
- 1...Rh4
- 2.Se7#
- 1...Re7
- 2.Sxe7#
- 1...Be5
- 2.Rxe5#
- 1...Sf2
- 2.Sxe3#
- 1...Sg3
- 2.Sf4#
- 2.Re5#
- threat
- 1.Qb1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 7
- Sets
- Q(a);N_GUARD,XQ(A)::S(C),XP(f)
- Q(a);N_GUARD::S(C),XP(f)
- Q(a);OGATE,XS(C)::B(E),XQ(a)
- R(i);N_GUARD,XP(H)::S(I)
- R(i);CHECK,N_GUARD::S(I),XR(i)
- R(i);N_GUARD::S(I)
- B(c);N_GUARD::P(D),XP(g)
- B(e);N_GUARD::S(C),XB(e)
- B(e);N_GUARD::R1(J),XB(e)
- B(e);S_CUTR(i)::S(I)
- S(b);S_CUTQ(a)::S(C),XP(f)
- Tries
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- R(i);CHECK,N_GUARD::S(I),XR(i)
- B(c);XP(D)::QAR1(A)
- Q(a);::QAR1(A)
- Refutation
- R(k);
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- R(i);CHECK,N_GUARD::S(I),XR(i)
- B(e);N_GUARD::S(C),XB(e)
- Refutation
- R(k);XQ(A)
- Try
- Q(A);XP(d)
- Threat
- DUALS(2)
- Vars
- R(i);CHECK,N_GUARD::S(I),XR(i)
- R(k);XB(E)::QAB1(A),XP(g)
- B(c);XP(D)::QAB(A)
- R(i);::QAB1(A),XP(g)
- R(k);::QAB1(A),XP(g)
- Q(a);::QAB1(A),XP(g)
- Q(a);::QAB(A)
- Q(a);N_GUARD::S(C),XP(f)
- Refutation
- R(k);
- Try
- Actual
- Q(A);
- Threat
- QAB1(A)
- Vars
- R(i);CHECK,N_GUARD::S(I),XR(i)
- Q(a);N_GUARD,XQ(A)::S(C),XP(f)
- Q(a);OGATE,XS(C)::B(E),XQ(a)
- B(c);N_GUARD,XQ(A)::P(D),XP(g)
- R(i);N_GUARD::B(E),XR(i)
- R(k);N_GUARD::S(I)
- R(k);N_GUARD::S(I),XR(k)
- B(e);N_GUARD::R1(J),XB(e)
- S(b);S_CUTQ(a)::S(C),XP(f)
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).