MESON Chess Problem Database
Problem Display
PID: 80443 (3B1N2/2p1K3/4P1Pp/qR1rQrkp/1pR2p1p/2N4P/p7/1bb5 w - - 0 1)
Ellerman, Arnoldo
2nd HM., Good Companions (February), 1923
#2
10 + 13
| 3391 | Het Half Pin Thema | 1924 |
SOLUTION
- SOUND
- Sets
- 1...Rd1
- 2.Qf6#
- 1...Rd2
- 2.Qxf4#
- 2.Qf6#
- 1...Rd3
- 2.Se4#
- 2.Qf6#
- 2.Qxf5#
- 1...Rd4
- 2.Qf6#
- 1...Rxb5
- 2.Kd7#
- 2.Ke8#
- 1...Rc5
- 2.Kd7#
- 2.Ke8#
- 1...Rd6
- 2.Qf6#
- 1...Rd7+
- 2.Kxd7#
- 1...Rxd8
- 2.Qf6#
- 1...Be4
- 2.Sxe4#
- 1...Rd1
- Tries
- 1.g7?
- threat
- 2.g8Q#
- 2.g8R#
- 1...Rd7+
- 2.Kxd7#
- 1...Qxb5
- 2.g8Q#
- 2.g8R#
- 1...Rxb5
- 2.Kd7#
- 2.Ke8#
- 2.g8Q#
- 2.g8R#
- 1...Rdxe5
- 2.g8Q#
- 2.g8R#
- 1...Rxd8
- 2.Qf6#
- 2.g8Q#
- 2.g8R#
- 1...bxc3
- 2.g8Q#
- 2.g8R#
- 1...a1Q
- 2.g8Q#
- 2.g8R#
- 1...a1S
- 2.g8Q#
- 2.g8R#
- 1...a1B
- 2.g8Q#
- 2.g8R#
- 1...a1R
- 2.g8Q#
- 2.g8R#
- 1...Qb6
- 2.g8Q#
- 2.g8R#
- 1...Qa3
- 2.g8Q#
- 2.g8R#
- 1...Qa4
- 2.g8Q#
- 2.g8R#
- 1...Qa6
- 2.g8Q#
- 2.g8R#
- 1...Qa7
- 2.g8Q#
- 2.g8R#
- 1...Qa8
- 2.g8Q#
- 2.g8R#
- 1...Rd1
- 2.Qf6#
- 2.g8Q#
- 2.g8R#
- 1...Rd2
- 2.Qxf4#
- 2.Qf6#
- 2.g8Q#
- 2.g8R#
- 1...Rd3
- 2.Se4#
- 2.Qf6#
- 2.Qxf5#
- 2.g8Q#
- 2.g8R#
- 1...Rd4
- 2.Qf6#
- 2.g8Q#
- 2.g8R#
- 1...Rc5
- 2.Kd7#
- 2.Ke8#
- 2.g8Q#
- 2.g8R#
- 1...Rd6
- 2.Qf6#
- 2.g8Q#
- 2.g8R#
- 1...Bc2
- 2.g8Q#
- 2.g8R#
- 1...Bd3
- 2.g8Q#
- 2.g8R#
- 1...Be4
- 2.Sxe4#
- 2.g8Q#
- 2.g8R#
- 1...Bb2
- 2.g8Q#
- 2.g8R#
- 1...Bd2
- 2.g8Q#
- 2.g8R#
- 1...Ba3
- 2.g8Q#
- 2.g8R#
- 1...Be3
- 2.g8Q#
- 2.g8R#
- 1...b3
- 2.g8Q#
- 2.g8R#
- 1...f3
- 2.g8Q#
- 2.g8R#
- 1...c5
- 2.g8Q#
- 2.g8R#
- 1...c6
- 2.g8Q#
- 2.g8R#
- 1...Rfxe5!
- threat
- 1.g7?
- Keys
- 1.Qe4!
- threat
- 2.Qg2#
- 1...Rd7+
- 2.Kxd7#
- 1...Rf7+
- 2.Kxf7#
- 1...Rxf8
- 2.Kxf8#
- 1...Bxe4
- 2.Sxe4#
- 1...Rd2
- 2.Qxf4#
- 1...Rd3
- 2.Qxf5#
- 1...Rfe5
- 2.Sh7#
- 1...Rf6
- 2.Sh7#
- 1...f3
- 2.Qxh4#
- threat
- 1.Qe4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 4
- Sets
- R(h);::QAB1(E)
- R(h);CHECK::B(I)+K(H),XR(h)
- R(h);XB(I)::QAB1(E)
- B(a);N_GUARD::S(A),XB(a)
- Tries
- Try
- P(G);
- Threat
- P=Q
- Vars
- R(h);CHECK::B(I)+K(H),XR(h)
- Q(g);XR(D)::P=Q
- R(h);N_SPINR(i),P_PINP(F),XQ(E)::P=Q
- P(d);XS(A)::P=Q
- P(c);::P=Q
- Q(g);::P=Q
- B(a);::P=Q
- B(b);::P=Q
- P(d);::P=Q
- P(e);::P=Q
- P(m);::P=Q
- Refutation
- R(i);N_SPINR(i),P_PINP(F),XQ(E)
- Try
- Actual
- Q(E);N_PINR(i)
- Threat
- QAR(E)
- Vars
- R(h);CHECK,P_SPINR(i)::B(I)+K(H),XR(h)
- R(i);CHECK,P_SPINR(h)::B(I)+K(H),XR(i)
- R(i);P_SPINR(h),XS(J)::B(I)+K(H),XR(i)
- B(a);XQ(E)::S(A),XB(a)
- R(h);P_SPINR(i),S_CUTB(b)::QAB1(E),XP(e)
- R(h);N_GUARD,P_SPINR(i),S_CUTB(a)::QAR1(E),XR(i)
- R(i);P_PINP(F)::S(J)
- R(i);P_SPINR(h)::S(J)
- P(e);OGATE::QAB1(E),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).