PID: 186668 (1r2r3/p1BR4/R7/2k5/P4p2/1PPB4/K2P2bq/8 w - - 0 1)
Henry, S
Chess, 1960
#2
9 + 7
SOLUTION
SOUND
Sets
1...Ra8
2.b4#
1...Rbc8
2.b4#
1...Rbd8
2.b4#
1...Bd5
2.Bd6#
1...Bb7
2.b4#
Tries
1.Bxb8?
threat
2.Bxa7#
2.b4#
1...Qh6
2.b4#
1...Re4
2.Bxa7#
1...Re6
2.b4#
1...Bd5
2.Bd6#
2.Bxa7#
1...Rxb8!
1.Rd5+?
1...Bxd5
2.Bd6#
1...Kxd5!
Keys
1.Bb5!
threat
2.d4#
2.b4#
1...Rxb5
2.d4#
1...Qg1
2.b4#
1...Qh8
2.b4#
1...Re2
2.b4#
1...Re4
2.Rc6#
1...Bf1
2.Rc6#
2.b4#
1...Bh1
2.b4#
1...Bf3
2.b4#
1...Bh3
2.Rc6#
2.b4#
1...Be4
2.b4#
1...Bd5
2.Bd6#
1...Bc6
2.Rxc6#
2.b4#
1...Bb7
2.b4#
1...Ba8
2.b4#
FEATURES
Static
TYPE = THREAT
CHANGED MATES = 0
ADDED MATES = 9
REMOVED MATES = 3
Sets
R(f);N_GUARD::P(C)
B(a);P_PINP(B),SBLOCK::B(H)
B(a);P_PINP(B),S_CUTR(f)::P(C)
Tries
Try
B(H);XR(f)
Threat
DUALS(2)
Vars
Q(b);::P(C)
R(g);::B(H),XP(e)
R(g);::P(C)
Refutation
R(g);XB(H)
Try
R(I);CHECK
Vars
B(a);P_PINP(B),SBLOCK,XR(I)::B(H)
Refutation
K(d);P-FLIGHT,XR(I)
Actual
B(E);
Threat
DUALS(2)
Vars
R(f);XB(E)::P(B)
Q(b);::P(C)
R(g);P_PINP(B)::P(C)
R(g);S_CUTB(a)::R1(G)
B(a);P_PINP(B)::P(C)
B(a);P_PINP(B),SBLOCK::B(H)
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).