MESON Chess Problem Database
Problem Display
PID: 120795 (b5R1/8/5p2/1Q2b2p/3pk2p/1N3R2/1P3Pn1/Kn4NB w - - 0 1)
Willis, J
Town and Country Journal, 1878
#2
9 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bh2
- 2.Qf5#
- 1...Bg3
- 2.Qf5#
- 1...Bd6
- 2.Qf5#
- 1...Bc7
- 2.Qf5#
- 1...Bb8
- 2.Qf5#
- 1...Bd5
- 2.Sc5#
- 2.Qd3#
- 1...Bc6
- 2.Qxc6#
- 1...Bb7
- 2.Qxb7#
- 1...Sd2
- 2.Sxd2#
- 1...Sa3
- 2.Sd2#
- 1...Sc3
- 2.Sd2#
- 1...d3
- 2.Qxd3#
- 1...Bh2
- Tries
- 1.Rf4+?
- 1...Bxf4
- 2.Bxg2#
- 1...Kxf4!
- 1...Bxf4
- 1.Rg4+?
- 1...Bf4
- 2.Rfxf4#
- 1...Sf4
- 2.Rfxf4#
- 1...hxg4!
- 1...Bf4
- 1.Rd8?
- threat
- 2.Sc5#
- 2.Qd3#
- 1...Bf4
- 2.Rxd4#
- 1...Bh2
- 2.Rxd4#
- 2.Qf5#
- 1...Bg3
- 2.Rxd4#
- 2.Qf5#
- 1...Bd6
- 2.Qf5#
- 1...Bc7
- 2.Rxd4#
- 2.Qf5#
- 1...Bb8
- 2.Rxd4#
- 2.Qf5#
- 1...Se1
- 2.Sc5#
- 2.Qe2#
- 1...Se3
- 2.Sc5#
- 1...d3
- 2.Sc5#
- 2.Qxd3#
- 1...Sf4!
- threat
- 1.Qe2+?
- 1...Se3
- 2.Rxf6#
- 1...Kd5!
- 1...Se3
- 1.Qd7?
- threat
- 2.Sc5#
- 1...Bh2
- 2.Qf5#
- 2.Qxd4#
- 1...Bg3
- 2.Qf5#
- 2.Qxd4#
- 1...Bd6
- 2.Qf5#
- 1...Bc7
- 2.Qf5#
- 2.Qxd4#
- 1...Bb8
- 2.Qf5#
- 2.Qxd4#
- 1...Bf4!
- threat
- 1.Qd5+?
- 1...Bxd5
- 2.Sc5#
- 1...Kxd5!
- 1...Bxd5
- 1.Rf4+?
- Keys
- 1.Sh3!
- 1...Kxf3
- 2.Bxg2#
- 2.Qd3#
- 1...Bh2
- 2.Qf5#
- 1...Bg3
- 2.Qf5#
- 1...Bf4
- 2.Rxf4#
- 1...Bd6
- 2.Qf5#
- 1...Bc7
- 2.Qf5#
- 1...Bb8
- 2.Qf5#
- 1...Bd5
- 2.Qd3#
- 1...Bc6
- 2.Qxc6#
- 1...Bb7
- 2.Qxb7#
- 1...Sd2
- 2.Sxd2#
- 1...Sa3
- 2.Sd2#
- 1...Sc3
- 2.Sd2#
- 1...Se1
- 2.Rf4#
- 1...Se3
- 2.Rf4#
- 1...Sf4
- 2.Rxf4#
- 1...d3
- 2.Qxd3#
- 1...f5
- 2.Sg5#
- 1...Kxf3
- 1.Sh3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- B(f);OGATE::QAB1(H)
- B(i);N_GUARD::QAB(H),XB(i)
- S(a);N_GUARD::S(F),XS(a)
- S(a);N_GUARD::S(F)
- P(c);P_PINP(D)::QAB1(H),XP(c)
- Tries
- Try
- R(G);CHECK,P_PINS(b)
- Vars
- B(f);SBLOCK,XR(G)::B(C),XS(b)
- Refutation
- K(d);N_SPINS(b),P-FLIGHT,XR(G)
- Try
- R(I);CHECK
- Vars
- B(f);N_GUARD,P_SPINB(f)::R1(G),XB(f)
- S(b);P_SPINS(b)::B(C)+R(G),DCHECK,XS(b)
- Refutation
- P(g);XR(I)
- Try
- R(I);
- Threat
- DUALS(2)
- Vars
- B(f);N_GUARD::R1(I),XP(c)
- B(f);OGATE::QAB1(H)
- S(b);::S(F)
- Refutation
- S(b);
- Try
- Q(H);CHECK
- Vars
- S(b);P_SPINS(b)::B(C)+R(G),XP(h)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(H);
- Threat
- S(F)
- Vars
- B(f);::QAB1(H)
- Refutation
- B(f);
- Try
- Q(H);CHECK
- Vars
- B(i);SBLOCK,XQ(H)::S(F)
- Refutation
- K(d);S_FLIGHT,XQ(H)
- Try
- Actual
- S(B);
- Vars
- B(f);OGATE::QAB1(H)
- B(f);N_GUARD::R1(G),XB(f)
- B(i);SBLOCK::QAB1(H)
- B(i);N_GUARD::QAB(H),XB(i)
- S(a);N_GUARD::S(F),XS(a)
- S(a);N_GUARD::S(F)
- S(b);::B(C)+R(G),DCHECK
- S(b);::B(C)+R(G),DCHECK,XS(b)
- P(c);P_PINP(D)::QAB1(H),XP(c)
- P(h);N_GUARD::S(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).