MESON Chess Problem Database
Problem Display
PID: 204330 (5r2/1nQ1R1rB/1K2N1q1/2P2n2/2P1kN2/2p2b2/1b3P2/3R4 w - - 0 1)
Ellerman, Arnoldo
L'Alfiere di Re, 1925
#2
10 + 9
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qh5
- 2.Sg5#
- 2.Sxg7#
- 2.Rd4#
- 1...Qf7
- 2.Sg5#
- 2.Rd4#
- 1...Qxh7
- 2.Sg5#
- 1...Qe8
- 2.Sg5#
- 2.Rd4#
- 1...Qg1
- 2.Sg5#
- 2.Sxg7#
- 2.Rd4#
- 1...Qg2
- 2.Sg5#
- 2.Sxg7#
- 2.Rd4#
- 1...Qg3
- 2.Sg5#
- 2.Sxg7#
- 2.Rd4#
- 1...Qg4
- 2.Sg5#
- 2.Sxg7#
- 2.Rd4#
- 1...Qg5
- 2.Sxg5#
- 2.Rd4#
- 1...Qxe6+
- 2.Rxe6#
- 1...Qh6
- 2.Rd4#
- 1...Qh5
- Tries
- 1.Sxg6?
- threat
- 2.Sg5#
- 2.Qf4#
- 2.Qe5#
- 2.Qc6#
- 2.Qxb7#
- 1...Rxg6
- 2.Qf4#
- 1...Rxe7
- 2.Sg5#
- 2.Qf4#
- 2.Qe5#
- 2.Qc6#
- 1...Sxe7
- 2.Qe5#
- 1...Sxc5
- 2.Sxc5#
- 2.Sg5#
- 2.Qf4#
- 2.Qe5#
- 2.Qc6#
- 1...Bh1
- 2.Sg5#
- 2.Qf4#
- 2.Qc6#
- 2.Qxb7#
- 1...Be2
- 2.Sg5#
- 2.Qf4#
- 2.Qc6#
- 2.Qxb7#
- 1...Bg2
- 2.Sg5#
- 2.Qf4#
- 2.Qc6#
- 2.Qxb7#
- 1...Bg4
- 2.Sg5#
- 2.Qf4#
- 2.Qc6#
- 2.Qxb7#
- 1...Bh5
- 2.Sg5#
- 2.Qf4#
- 2.Qc6#
- 2.Qxb7#
- 1...Se3
- 2.Sxg7#
- 2.Qe5#
- 1...Sg3
- 2.Sxg7#
- 2.Qe5#
- 1...Sd4
- 2.Qe5#
- 1...Sh4
- 2.Sxg7#
- 2.Qe5#
- 1...Sfd6
- 2.Sxg7#
- 1...Sh6
- 2.Sxg7#
- 2.Qe5#
- 1...Rf6
- 2.Qf4#
- 2.Qe5#
- 2.Qc6#
- 2.Qxb7#
- 1...Rb8
- 2.Sg5#
- 2.Qf4#
- 2.Qe5#
- 2.Qc6#
- 1...Rc8
- 2.Sg5#
- 2.Qf4#
- 2.Qe5#
- 1...Rd8
- 2.Sg5#
- 2.Qf4#
- 2.Qe5#
- 1...Bc1
- 2.Sg5#
- 2.Qe5#
- 2.Qc6#
- 2.Qxb7#
- 1...Sa5
- 2.Sg5#
- 2.Qf4#
- 2.Qe5#
- 1...Sbd6
- 2.Sg5#
- 2.Qc6#
- 1...Sd8
- 2.Sg5#
- 2.Qf4#
- 2.Qe5#
- 1...c2
- 2.Sg5#
- 2.Qf4#
- 2.Qc6#
- 2.Qxb7#
- 1...Bxd1!
- threat
- 1.Sxg6?
- Keys
- 1.Se2!
- threat
- 2.Qf4#
- 1...Qxe6+
- 2.Rxe6#
- 1...Sxe7
- 2.Sg3#
- 1...Se3
- 2.Sg3#
- 1...Sg3
- 2.Sxg3#
- 1...Sd4
- 2.Sg3#
- 1...Sh4
- 2.Sg3#
- 1...Sfd6
- 2.Sxg7#
- 1...Sh6
- 2.Sg3#
- 1...Sbd6
- 2.Sg5#
- 1...Qg3
- 2.Sg5#
- 2.Rd4#
- 1...Qg4
- 2.Sg5#
- 2.Sxg7#
- 2.Rd4#
- 1...Qg5
- 2.Sxg5#
- 2.Rd4#
- 1...Qh6
- 2.Rd4#
- 1...Bc1
- 2.Sxc3#
- threat
- 1.Se2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 1
- Sets
- Q(f);N_PINS(G),XB(J)::R(I)+S(G),DCHECK
- Q(f);CHECK,OGATE,P_SPINQ(f),P_SPINS(e),XS(G)::R(I),XQ(f)
- Q(f);P_SPINS(e)::R1(A)
- Tries
- Try
- S(D);N_SPINS(G),XQ(f)
- Threat
- DUALS(5)
- Vars
- R(h);P_PINS(G),XS(D)::QAR1(H)
- S(e);XR(I)::QAR1(H)
- S(e);::QAR1(H)
- S(e);N_GUARD::R(I)+S(G),XR(h)
- Refutation
- B(c);XR(A)
- Try
- Actual
- S(D);
- Threat
- QAR1(H)
- Vars
- Q(f);CHECK,OGATE,P_SPINQ(f),P_SPINS(e),XS(G)::R(I),XQ(f)
- S(e);N_GUARD,P_SPINQ(f),XR(I)::S(D)
- S(e);N_GUARD,P_SPINQ(f)::S(D)
- S(e);N_GUARD,P_SPINQ(f)::S(D),XS(e)
- S(e);N_PINS(G),P_SPINQ(f)::R(I)+S(G),XR(h)
- S(g);N_PINS(G)::R(I)+S(G),DCHECK
- Q(f);P_SPINS(e)::R1(A)
- B(a);N_GUARD::S(D),XP(b)
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).