MESON Chess Problem Database
Problem Display
PID: 270742 (1br5/3Pp3/2p2N2/4k1B1/r1R5/PnP1pnNB/1K1Qb1q1/5R2 w - - 0 1)
Ellerman, Arnoldo
Probleemblad, 1951
#2
11 + 11
SOLUTION
- SOUND
- Sets
- 1...Rxa3
- 2.Re4#
- 1...Ra5
- 2.Re4#
- 1...Ra6
- 2.Re4#
- 1...Ra7
- 2.Re4#
- 1...Ra8
- 2.Re4#
- 1...Bd6
- 2.Qxe3#
- 1...Sa1
- 2.Rc5#
- 1...Sc1
- 2.Rc5#
- 1...Sa5
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...c5
- 2.Qd5#
- 1...exf6
- 2.Bf4#
- 1...e6
- 2.Sg4#
- 1...Rxa3
- Tries
- 1.dxc8Q?
- threat
- 2.Sg4#
- 2.Sd7#
- 2.Qf5#
- 2.Qe6#
- 2.Qxb8#
- 1...Qxg3
- 2.Sd7#
- 2.Qf5#
- 2.Qe6#
- 2.Qxb8#
- 1...Rxc4
- 2.Sd7#
- 2.Qf5#
- 2.Qe6#
- 2.Qxb8#
- 1...Bxc4
- 2.Sg4#
- 2.Sd7#
- 2.Qf5#
- 2.Qxb8#
- 1...Sbxd2
- 2.Qe6#
- 2.Qxb8#
- 1...Sfxd2
- 2.Qe6#
- 2.Qxb8#
- 1...Sxg5
- 2.Sd7#
- 2.Rf5#
- 2.Qf5#
- 2.Qxb8#
- 1...exd2
- 2.Qe6#
- 2.Qxb8#
- 1...exf6
- 2.Bf4#
- 2.Qf5#
- 2.Qe6#
- 2.Qxb8#
- 2.Qe8#
- 1...Bd3
- 2.Qe6#
- 2.Qxb8#
- 1...Sbd4
- 2.Qxb8#
- 1...Sfd4
- 2.Qxb8#
- 1...Rb4
- 2.Sg4#
- 2.Sd7#
- 2.Qf5#
- 2.Qe6#
- 1...Ra7
- 2.Sg4#
- 2.Re4#
- 2.Qf5#
- 2.Qe6#
- 1...Ra8
- 2.Sg4#
- 2.Sd7#
- 2.Re4#
- 2.Qf5#
- 2.Qe6#
- 1...Bd6
- 2.Sg4#
- 2.Sd7#
- 2.Qxe3#
- 2.Qf5#
- 2.Qe6#
- 1...Ba7
- 2.Sg4#
- 2.Sd7#
- 2.Qf5#
- 2.Qe6#
- 2.Qc7#
- 1...Bc7
- 2.Sg4#
- 2.Sd7#
- 2.Qf5#
- 2.Qe6#
- 2.Qxc7#
- 1...Sc5
- 2.Sg4#
- 2.Rxc5#
- 2.Qf5#
- 2.Qxb8#
- 1...Se1
- 2.Sd7#
- 2.Rf5#
- 2.Qf5#
- 2.Qe6#
- 2.Qxb8#
- 1...Sg1
- 2.Sd7#
- 2.Rf5#
- 2.Qf5#
- 2.Qe6#
- 2.Qxb8#
- 1...Sh2
- 2.Sd7#
- 2.Rf5#
- 2.Qf5#
- 2.Qe6#
- 2.Qxb8#
- 1...Sh4
- 2.Sd7#
- 2.Qe6#
- 2.Qxb8#
- 1...e6
- 2.Sg4#
- 2.Sd7#
- 2.Qxe6#
- 2.Qxb8#
- 1...Qxh3!
- threat
- 1.dxc8Q?
- Keys
- 1.Rxc6!
- threat
- 2.Re6#
- 2.Qd5#
- 1...Qxh3
- 2.Qd5#
- 1...Rxc6
- 2.Qd5#
- 1...Bxf1
- 2.Re6#
- 1...Sbxd2
- 2.Re6#
- 1...Sfxd2
- 2.Rf5#
- 2.Re6#
- 1...Sxg5
- 2.Rf5#
- 1...exd2
- 2.Re6#
- 1...exf6
- 2.Re6#
- 1...Rd4
- 2.Re6#
- 1...Rg4
- 2.Sxg4#
- 2.Qd5#
- 1...Ra5
- 2.Sg4#
- 2.Re6#
- 2.Qxe3#
- 1...Ra6
- 2.Sg4#
- 2.Qxe3#
- 2.Qd5#
- 1...Bd1
- 2.Re6#
- 1...Bd3
- 2.Re6#
- 1...Bc4
- 2.Sg4#
- 1...Bb5
- 2.Re6#
- 1...Ba6
- 2.Re6#
- 1...Bd6
- 2.Qd5#
- 1...Sbd4
- 2.Qxe3#
- 1...Sc5
- 2.Qd5#
- 1...Se1
- 2.Rf5#
- 2.Re6#
- 1...Sg1
- 2.Rf5#
- 2.Re6#
- 1...Sh2
- 2.Rf5#
- 2.Re6#
- 1...Sfd4
- 2.Bf4#
- 1...Sh4
- 2.Re6#
- 1...e6
- 2.Rxe6#
- threat
- 1.Rxc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 15
- REMOVED MATES = 9
- Sets
- R(f);N_GUARD,XP(D)::R1(H)
- R(f);N_GUARD::R1(H)
- B(j);SBLOCK::QAR2(C),XP(d)
- S(c);N_GUARD::R(H)
- S(c);N_GUARD::R(H),XS(c)
- P(h);N_GUARD::QAR1(C)
- P(i);SBLOCK,XS(J)::B(I)
- P(i);SBLOCK::S(J)
- Tries
- Try
- P(K);XR(k)
- Threat
- DUALS(5)
- Vars
- S(c);::QAB(K),XB(j)
- S(e);::QAB(K),XB(j)
- Refutation
- Q(b);XB(G)
- Try
- Actual
- R(H);XP(h)
- Threat
- DUALS(2)
- Vars
- Q(b);XB(G)::QAR1(C)
- R(k);XR(H)::QAR1(C)
- B(a);P_PINQ(C),XR(A)::R1(H)
- S(c);XQ(C)::R1(H)
- S(e);OGATE,XB(I)::R1(A)
- P(d);XQ(C)::R1(H)
- P(i);XS(J)::R1(H)
- R(f);::R1(H)
- B(a);P_PINQ(C)::R1(H)
- B(a);P_PINQ(C),S_CUTR(f)::S(J)
- B(j);::QAR1(C)
- S(c);S_CUTR(f)::QAR2(C),XP(d)
- S(c);::QAR1(C)
- S(e);S_CUTR(f)::B(I)
- S(e);::R1(H)
- P(i);::R1(H),XP(i)
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).