MESON Chess Problem Database
Problem Display
PID: 139934 (4Q1K1/8/4pB2/Rr2qkP1/2n2p2/2bR4/5N2/1B6 w - - 0 1)
Ellerman, Arnoldo
HM., 4. Centurini Ty., 1925
#2
8 + 7
| 3530 | Het Half Pin Thema (II) | 1947 |
SOLUTION
- SOUND
- Sets
- 1...Qd4
- 2.Rxd4#
- 1...Qd6
- 2.Rd4#
- 2.Rd5#
- 2.Rxd6#
- 1...Qxf6
- 2.Rd5#
- 1...Qc7
- 2.Rd1#
- 2.Rd2#
- 2.Rxc3#
- 2.Re3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 2.Rd4#
- 2.Rd5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qb8
- 2.Rd1#
- 2.Rd2#
- 2.Rxc3#
- 2.Re3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 2.Rd4#
- 2.Rd5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qe1
- 2.Rd5#
- 1...Qe2
- 2.Rd5#
- 1...Qe3
- 2.Rxe3#
- 2.Rd5#
- 1...Qc5
- 2.Rd5#
- 1...Qd5
- 2.Rxd5#
- 1...Rxa5
- 2.Rd5#
- 1...Rc5
- 2.Rd5#
- 1...Rd5
- 2.Rdxd5#
- 1...Bb2
- 2.Rd5#
- 1...Bb4
- 2.Rd5#
- 1...f3
- 2.Rxf3#
- 1...Qd4
- Tries
- 1.Kh7?
- threat
- 2.Qg6#
- 1...Qc7+
- 2.Rd7#
- 1...Qxf6
- 2.Rd5#
- 1...f3
- 2.Rxf3#
- 1...Rb7+!
- threat
- 1.Rd1+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Rd2+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Rxc3+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Re3+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Rf3+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Rg3+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Rh3+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Rd4+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Rd6+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Rd7+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Rd8+?
- 1...Qe4
- 2.Bxe4#
- 1...Rxb1!
- 1...Qe4
- 1.Kh7?
- Keys
- 1.Qf7!
- threat
- 2.Qh7#
- 1...Qb8+
- 2.Rd8#
- 1...Rb8+
- 2.Bd8#
- 1...Qxf6
- 2.Rd5#
- 1...f3
- 2.Rxf3#
- 1...Qc7
- 2.Rd1#
- 2.Rd2#
- 2.Rxc3#
- 2.Re3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 2.Rd4#
- 2.Rd5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Rb7
- 2.Be7#
- threat
- 1.Qf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 10
- Sets
- Q(e);N_GUARD,P_SPINR(d)::B(A)+R(C),XQ(e)
- Q(e);P_SPINR(d),XB(F)::B(A)+R(C),DCHECK
- Q(e);P_SPINR(d)::B(A)+R(C),DCHECK
- Q(e);::B(A)+R(C),DCHECK
- Q(e);::B(A)+R(C),DCHECK,XQ(e)
- R(d);N_GUARD,XR(D)::B(A)+R(C)
- R(d);N_GUARD::B(A)+R(C)
- R(d);N_GUARD::B(A)+R(C),XR(d)
- B(a);S_CUTR(d)::B(A)+R(C)
- P(c);::B(A)+R(C),DCHECK,XP(c)
- Tries
- Try
- K(H);S_FLIGHT
- Threat
- QAB1(G)
- Vars
- Q(e);CHECK,N_GUARD,P_SPINR(d)::B(A)+R(C)
- Q(e);P_SPINR(d),XB(F)::B(A)+R(C),DCHECK
- P(c);::B(A)+R(C),DCHECK,XP(c)
- Refutation
- R(d);CHECK,P_SPINQ(e)
- Try
- R(C);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- R(C);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- R(C);CHECK,XB(a)
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- R(C);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- R(C);CHECK,P_PINP(c)
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- R(C);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- R(C);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- R(C);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- R(C);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- R(C);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- R(C);CHECK
- Vars
- Q(e);N_GUARD,P_SPINQ(e),P_SPINR(d)::B(A),XQ(e)
- Refutation
- R(d);P_SPINQ(e),XB(A)
- Try
- Actual
- Q(G);
- Threat
- QAB(G)
- Vars
- Q(e);CHECK,N_GUARD,P_SPINR(d)::B(A)+R(C)
- R(d);CHECK,P_SPINQ(e)::QAR(G)+B(F)
- Q(e);P_SPINQ(e),P_SPINR(d),XB(F)::B(A)+R(C),DCHECK
- P(c);::B(A)+R(C),DCHECK,XP(c)
- R(d);P_SPINQ(e)::QAR(G)+B(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).