MESON Chess Problem Database
Problem Display
PID: 56555 (5rN1/RK3kNP/1p4pP/8/2q1PB2/1B6/1n1r4/3Q1nb1 w - - 0 1)
Ellerman, Arnoldo
6th HM., Brisbane Courier, 1916-1917
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qd5+
- 2.Ka6#
- 1...Qe6
- 2.Bxe6#
- 1...Rc2
- 2.Qd7#
- 1...Re2
- 2.Qd7#
- 1...Rf2
- 2.Kxb6#
- 2.Qd7#
- 1...Rg2
- 2.Qd7#
- 1...Rh2
- 2.Qd7#
- 1...Rd7+
- 2.Qxd7#
- 1...Sd3
- 2.Bxc4#
- 1...g5
- 2.Qh5#
- 1...Qd5+
- Tries
- 1.Bxc4+?
- 1...Rd5
- 2.Ka6#
- 2.Kc6#
- 2.Bxd5#
- 2.Qxd5#
- 1...Sxc4!
- 1...Rd5
- 1.Bxc4+?
- Keys
- 1.Qf3!
- threat
- 2.Bxd2#
- 2.Bh2#
- 2.Be3#
- 2.Bg3#
- 2.Be5#
- 2.Bg5#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Qd5+
- 2.Ka6#
- 1...Rd7+
- 2.Bc7#
- 1...Rb8+
- 2.Bxb8#
- 1...Qxb3
- 2.Be3#
- 1...Rxg8
- 2.Bg5#
- 2.Bd6#
- 1...g5
- 2.Qh5#
- 1...Rd1
- 2.Bc1#
- 2.Bd2#
- 2.Bh2#
- 2.Be3#
- 2.Bg3#
- 2.Be5#
- 2.Bg5#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Rc2
- 2.Bc1#
- 2.Bd2#
- 2.Bh2#
- 2.Be3#
- 2.Bg3#
- 2.Be5#
- 2.Bg5#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Re2
- 2.Bc1#
- 2.Bd2#
- 2.Bh2#
- 2.Be3#
- 2.Bg3#
- 2.Be5#
- 2.Bg5#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Rf2
- 2.Kxb6#
- 1...Rg2
- 2.Bc1#
- 2.Bd2#
- 2.Bh2#
- 2.Be3#
- 2.Bg3#
- 2.Be5#
- 2.Bg5#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Rh2
- 2.Bc1#
- 2.Bd2#
- 2.Bxh2#
- 2.Be3#
- 2.Bg3#
- 2.Be5#
- 2.Bg5#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Rd3
- 2.Be3#
- 1...Rd4
- 2.Bc1#
- 2.Bd2#
- 2.Bh2#
- 2.Be3#
- 2.Bg3#
- 2.Be5#
- 2.Bg5#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Rd5
- 2.Be5#
- 1...Rd6
- 2.Bxd6#
- 1...Rdd8
- 2.Bc1#
- 2.Bd2#
- 2.Bh2#
- 2.Be3#
- 2.Bg3#
- 2.Be5#
- 2.Bg5#
- 2.Bd6#
- 2.Bc7#
- 2.Bb8#
- 1...Bh2
- 2.Bxh2#
- 2.Bg3#
- 1...Be3
- 2.Bxe3#
- 1...Bd4
- 2.Be5#
- 1...Sh2
- 2.Bxh2#
- 1...Se3
- 2.Bxe3#
- 1...Sg3
- 2.Bxg3#
- 1...Sd3
- 2.Bxc4#
- threat
- 1.Qf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 11
- REMOVED MATES = 5
- Sets
- Q(e);CHECK::R(F)+K(G)
- Q(e);OGATE::B(B),XQ(e)
- R(d);OGATE::QAR2(A)
- R(d);CHECK,OGATE::QAR2(A),XR(d)
- S(c);N_GUARD,S_CUTR(d)::B(B),XQ(e)
- P(g);OGATEB::QAB(A)
- Tries
- Try
- B(B);CHECK,XQ(e)
- Refutation
- S(c);XB(B)
- Try
- Actual
- Q(A);
- Threat
- DUALS(9)
- Vars
- Q(e);CHECK::R(F)+K(G)
- R(d);CHECK::QAR(A)+B(D)
- R(i);CHECK::QAR(A)+B(D),XR(i)
- Q(e);N_SPINQ(e),XB(B)::QAR(A)+B(D)
- P(g);OGATEB::QAB(A)
- R(d);::R(F)+K(G),XP(f)
- R(d);::QAR(A)+B(D)
- R(d);N_SPINQ(e)::QAR(A)+B(D)
- R(d);::QAR(A)+B(D),XR(d)
- B(b);::QAR(A)+B(D),XB(b)
- B(b);::QAR(A)+B(D)
- S(a);::QAR(A)+B(D),XS(a)
- S(c);N_GUARD,S_CUTR(d)::B(B),XQ(e)
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).