MESON Chess Problem Database
Problem Display
PID: 19072 (3bb3/1p3q2/1p3rR1/8/R2B1k1n/Q1NP1NpB/4P3/2K5 w - - 0 1)
Chandler, Guy Wills
8th Place, Four-Leaved Shamrock, 1912-1913
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.Sxd5#
- 1...Qxg6
- 2.Sd5#
- 1...Qe7
- 2.Sd5#
- 1...Qg7
- 2.Sd5#
- 1...Qh7
- 2.Sd5#
- 1...Qf8
- 2.Sd5#
- 1...Rf5
- 2.Rg4#
- 1...Rd6
- 2.Qxd6#
- 1...Re6
- 2.Sd5#
- 1...Sxf3
- 2.e3#
- 1...Sf5
- 2.Rg4#
- 1...Qd5
- Tries
- 1.Bg1+?
- 1...Qc4
- 2.Rxc4#
- 1...Bxa4!
- 1...Qc4
- 1.Bf2+?
- 1...Qc4
- 2.Rxc4#
- 1...Bxa4!
- 1...Qc4
- 1.Bc5+?
- 1...Qc4
- 2.Rxc4#
- 1...Bxa4!
- 1...Qc4
- 1.Bxb6+?
- 1...Qc4
- 2.Rxc4#
- 1...Bxa4!
- 1...Qc4
- 1.Rxf6+?
- 1...Qxf6
- 2.Sd5#
- 1...Sf5
- 2.Qd6#
- 1...Bxf6!
- 1...Qxf6
- 1.Qc5?
- threat
- 2.Be3#
- 2.Be5#
- 2.Rg4#
- 2.Qe5#
- 2.Qg5#
- 1...Qxg6
- 2.Sd5#
- 2.Be3#
- 2.Be5#
- 2.Qe5#
- 1...Rxg6
- 2.Be3#
- 2.Be5#
- 2.Qe5#
- 1...Sxf3
- 2.Be3#
- 2.Be5#
- 2.Rg4#
- 2.e3#
- 1...Sxg6
- 2.Be3#
- 2.Be5#
- 2.Qg5#
- 1...Qd5
- 2.Sxd5#
- 2.Be3#
- 2.Be5#
- 1...Qe6
- 2.Be3#
- 2.Be5#
- 2.Qg5#
- 1...Qg8
- 2.Be3#
- 2.Be5#
- 2.Qe5#
- 2.Qg5#
- 1...Qc7
- 2.Sd5#
- 2.Be3#
- 2.Be5#
- 2.Rg4#
- 2.Qg5#
- 1...Qd7
- 2.Be3#
- 2.Be5#
- 2.Qe5#
- 2.Qg5#
- 1...Qe7
- 2.Sd5#
- 2.Be3#
- 2.Be5#
- 2.Rg4#
- 2.Qg5#
- 1...Qg7
- 2.Sd5#
- 2.Be3#
- 2.Be5#
- 2.Qe5#
- 2.Qg5#
- 1...Rf5
- 2.Be3#
- 2.Be5#
- 2.Rg4#
- 1...Rc6
- 2.Be3#
- 2.Be5#
- 2.Rg4#
- 2.Qe5#
- 1...Rd6
- 2.Be3#
- 2.Be5#
- 2.Rg4#
- 2.Qxd6#
- 2.Qe5#
- 1...Re6
- 2.Sd5#
- 2.Be3#
- 2.Be5#
- 2.Rg4#
- 1...Bc7
- 2.Be3#
- 2.Be5#
- 2.Rg4#
- 2.Qg5#
- 1...Bd7
- 2.Be3#
- 2.Be5#
- 2.Qe5#
- 2.Qg5#
- 1...Sf5
- 2.Be3#
- 2.Be5#
- 2.Rg4#
- 2.Qe5#
- 1...bxc5!
- threat
- 1.Bg1+?
- Keys
- 1.Qf8!
- threat
- 2.Qh6#
- 1...Qxg6
- 2.Sd5#
- 1...Qxf8
- 2.Sd5#
- 1...Rxg6
- 2.Sd5#
- 1...Sxf3
- 2.e3#
- 1...Qd5
- 2.Sxd5#
- 1...Qg7
- 2.Sd5#
- 1...Qh7
- 2.Sd5#
- 1...Rf5
- 2.Rg4#
- 1...Rc6
- 2.Bc5#
- 1...Rd6
- 2.Qxd6#
- 1...Re6
- 2.Sd5#
- 1...Sf5
- 2.Rg4#
- threat
- 1.Qf8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- Q(g);N_GUARD::S(D),XQ(g)
- Q(g);N_GUARD,XR(J)::S(D)
- Q(g);N_GUARD::S(D)
- R(e);SBLOCK::R1(J)
- R(e);N_GUARD::QAB(C),XR(e)
- R(e);S_CUTQ(g)::S(D)
- S(c);SBLOCK,XS(F)::P(B)
- S(c);SBLOCK::R1(J)
- Tries
- Try
- B(I);CHECK
- Vars
- Q(g);N_GUARD,P_PINS(D),P_SPINQ(g)::R(H),XQ(g)
- Refutation
- B(i);XR(H)
- Try
- B(I);CHECK
- Vars
- Q(g);N_GUARD,P_PINS(D),P_SPINQ(g)::R(H),XQ(g)
- Refutation
- B(i);XR(H)
- Try
- B(I);CHECK
- Vars
- Q(g);N_GUARD,P_PINS(D),P_SPINQ(g)::R(H),XQ(g)
- Refutation
- B(i);XR(H)
- Try
- B(I);CHECK,XP(d)
- Vars
- Q(g);N_GUARD,P_PINS(D),P_SPINQ(g)::R(H),XQ(g)
- Refutation
- B(i);XR(H)
- Try
- R(J);CHECK,XR(e)
- Vars
- Q(g);XR(J)::S(D)
- S(c);P_SPINS(c)::QAB(C)
- Refutation
- B(h);XR(J)
- Try
- Q(C);
- Threat
- DUALS(5)
- Refutation
- P(d);XQ(C)
- Try
- Actual
- Q(C);
- Threat
- QAB(C)
- Vars
- Q(g);N_GUARD,P_SPINR(e),XR(J)::S(D)
- Q(g);N_GUARD,XQ(C)::S(D)
- R(e);P_SPINQ(g),XR(J)::S(D)
- S(c);SBLOCK,XS(F)::P(B)
- Q(g);N_GUARD,P_SPINR(e)::S(D),XQ(g)
- Q(g);N_GUARD,P_SPINR(e)::S(D)
- R(e);SBLOCK::R1(J)
- R(e);P_PINS(D),P_SPINQ(g),S_CUTB(i)::R(H)+B(I)
- R(e);N_GUARD,P_SPINQ(g)::QAB(C),XR(e)
- R(e);P_SPINQ(g)::S(D)
- S(c);SBLOCK::R1(J)
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).