MESON Chess Problem Database
Problem Display
PID: 238734 (8/q6p/7n/1p5R/1RN1Nkpp/pQ3P2/3P1p1P/5K2 w - - 0 1)
Ellerman, Arnoldo
L'Italia Scacchistica, 1962
#2
9 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qe3
- 2.Qxe3#
- 1...Qb8
- 2.Qe3#
- 1...Qa4
- 2.Qe3#
- 1...Qa5
- 2.Qe3#
- 1...Qa6
- 2.Qe3#
- 1...Qb7
- 2.Qe3#
- 1...Qc7
- 2.Qe3#
- 1...Qd7
- 2.Qe3#
- 1...Qe7
- 2.Qe3#
- 1...Qf7
- 2.Qe3#
- 1...Qg7
- 2.Qe3#
- 1...Qa8
- 2.Qe3#
- 1...Qe3
- Tries
- 1.Sb6?
- threat
- 2.Sxf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sd6#
- 2.Sf6#
- 2.Sd5#
- 2.Qe3#
- 1...Qxb6
- 2.Sc5#
- 1...gxf3
- 2.Sxf2#
- 2.Sc3#
- 2.Sg3#
- 2.Sc5#
- 2.Sd6#
- 2.Sf6#
- 1...Qa4
- 2.Sd5#
- 2.Qe3#
- 1...Qa5
- 2.Sd5#
- 2.Qe3#
- 1...Qb7
- 2.Qe3#
- 1...Qc7
- 2.Sc5#
- 2.Sd5#
- 2.Qe3#
- 1...Qd7
- 2.Sd6#
- 2.Qe3#
- 1...Qe7
- 2.Sd5#
- 2.Qe3#
- 1...Qf7
- 2.Qe3#
- 1...Qg7
- 2.Sf6#
- 2.Sd5#
- 2.Qe3#
- 1...Qa8
- 2.Qe3#
- 1...g3
- 2.Sxf2#
- 2.Sxg3#
- 2.Sc5#
- 2.Sd6#
- 2.Sf6#
- 2.Sd5#
- 2.Qe3#
- 1...Sf5!
- threat
- 1.Scd6?
- threat
- 2.Sc5#
- 1...Qe3
- 2.Qxe3#
- 1...Sf5
- 2.Rxf5#
- 1...Qc5
- 2.Sxc5#
- 1...Qa4
- 2.Qe3#
- 1...Qa5
- 2.Qe3#
- 1...Qb7
- 2.Qe3#
- 1...Qe7
- 2.Qe3#
- 1...Qf7
- 2.Qe3#
- 1...Qg7
- 2.Sf6#
- 2.Qe3#
- 1...Qa8
- 2.Qe3#
- 1...Qd4!
- threat
- 1.Sc3?
- threat
- 2.Se2#
- 2.Sd5#
- 1...Kxf3
- 2.Se5#
- 1...gxf3
- 2.Sb6#
- 1...Qd4
- 2.Se2#
- 1...Qc5
- 2.Se2#
- 1...Qb7
- 2.Se2#
- 1...Qd7
- 2.Se2#
- 1...Qe7
- 2.Sd5#
- 1...Qf7
- 2.Se2#
- 1...Qa8
- 2.Se2#
- 1...Qe3!
- threat
- 1.Sg3?
- threat
- 2.Se2#
- 2.Sb6#
- 1...gxf3
- 2.Sb6#
- 1...hxg3
- 2.Sb6#
- 1...bxc4
- 2.Se2#
- 1...Qe3
- 2.Qxe3#
- 1...Qd4
- 2.Se2#
- 1...Qc5
- 2.Se2#
- 1...Qb6
- 2.Se2#
- 2.Sxb6#
- 1...Qa4
- 2.Se2#
- 2.Qe3#
- 1...Qa5
- 2.Se2#
- 2.Sxa5#
- 2.Qe3#
- 1...Qb7
- 2.Se2#
- 2.Qe3#
- 1...Qc7
- 2.Se2#
- 2.Qe3#
- 1...Qd7
- 2.Se2#
- 2.Sd6#
- 2.Qe3#
- 1...Qf7
- 2.Se2#
- 2.Qe3#
- 1...Qg7
- 2.Se2#
- 2.Se5#
- 2.Qe3#
- 1...Qa8
- 2.Se2#
- 2.Qe3#
- 1...Sf5
- 2.Se2#
- 2.Rxf5#
- 1...Qe7!
- threat
- 1.Sc5?
- threat
- 2.Sb2#
- 2.Sxa3#
- 2.Sa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Se6#
- 2.Qe3#
- 1...gxf3
- 2.Sb2#
- 2.Sxa3#
- 2.Se3#
- 2.Sa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...bxc4
- 2.Se6#
- 2.Rxc4#
- 2.Qe3#
- 1...Qb6
- 2.Sb2#
- 2.Sxa3#
- 2.Sa5#
- 2.Se5#
- 2.Sxb6#
- 2.Sd6#
- 2.Qe3#
- 1...Qa4
- 2.Se6#
- 2.Qe3#
- 1...Qa5
- 2.Sxa5#
- 2.Se6#
- 2.Qe3#
- 1...Qa6
- 2.Sb2#
- 2.Sxa3#
- 2.Sa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Qe3#
- 1...Qb7
- 2.Se6#
- 2.Qe3#
- 1...Qd7
- 2.Sd6#
- 2.Qe3#
- 1...Qe7
- 2.Se5#
- 1...Qf7
- 2.Qe3#
- 1...Qg7
- 2.Se5#
- 2.Se6#
- 2.Qe3#
- 1...Qa8
- 2.Se6#
- 2.Qe3#
- 1...Sf5
- 2.Se6#
- 1...a2
- 2.Sb2#
- 2.Sa3#
- 2.Sa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Se6#
- 2.Qe3#
- 1...Qxc5!
- threat
- 1.Sb6?
- Keys
- 1.Se3!
- threat
- 2.Sg2#
- 2.Sd5#
- 1...Kxf3
- 2.Sg5#
- 1...Qxe3
- 2.Qxe3#
- 1...gxf3
- 2.Sc5#
- 1...Sf5
- 2.Rxf5#
- 1...Qd4
- 2.Sg2#
- 1...Qc5
- 2.Sg2#
- 1...Qb7
- 2.Sg2#
- 1...Qd7
- 2.Sg2#
- 1...Qf7
- 2.Sg2#
- 1...Qa8
- 2.Sg2#
- 1...h3
- 2.Sd5#
- threat
- 1.Se3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 6
- REMOVED MATES = 7
- Sets
- Q(h);N_GUARD::QAB1(D),XQ(h)
- Q(h);N_GUARD::QAB1(D)
- Tries
- Try
- S(G);
- Threat
- DUALS(7)
- Vars
- Q(h);XS(G)::R(F)+S(H)
- Q(h);::QAB1(D)
- Refutation
- S(g);
- Try
- S(G);
- Threat
- R(F)+S(H)
- Vars
- Q(h);N_GUARD::QAB1(D),XQ(h)
- S(g);N_GUARD::R1(I),XS(g)
- Q(h);::R(F)+S(H),XQ(h)
- Q(h);N_GUARD::QAB1(D)
- Refutation
- Q(h);
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- K(c);P-FLIGHT,XP(E)::S(G)
- P(d);SBLOCK,XP(E)::R(F)+S(G)
- Q(h);::S(H)
- Refutation
- Q(h);
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- P(d);XP(E)::R(F)+S(G)
- P(e);XS(H)::R(F)+S(G)
- P(f);P_SPINP(f),XS(G)::S(H)
- Q(h);N_GUARD::QAB1(D),XQ(h)
- Q(h);::S(H)
- Refutation
- Q(h);
- Try
- S(H);
- Threat
- DUALS(8)
- Vars
- Q(h);::R(F)+S(G)
- Q(h);::QAB1(D)
- S(g);::S(H)
- Refutation
- Q(h);XS(H)
- Try
- Actual
- S(G);
- Threat
- DUALS(2)
- Vars
- K(c);P-FLIGHT,XP(E)::S(H)
- Q(h);OGATE,XS(G)::QAB1(D),XQ(h)
- P(d);SBLOCK,XP(E)::R(F)+S(H)
- S(g);N_GUARD::R1(I),XS(g)
- Q(h);::S(G)
- P(e);::S(G)
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).