MESON Chess Problem Database
Problem Display
PID: 83486 (3N4/rp6/p4RpK/2k5/P6R/n3N3/2pq1B2/1n1Q4 w - - 0 1)
Ellerman, Arnoldo
Good Companions (April), 1917
#2
8 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...Qe1
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...Qc3
- 2.Qd5#
- 2.Qd6#
- 1...Qxe3+
- 2.Bxe3#
- 1...Qb4
- 2.Sc4#
- 2.Qd5#
- 2.Qd6#
- 1...Qa5
- 2.Sf1#
- 2.Sxc2#
- 2.Sg2#
- 2.Sd5#
- 2.Sf5#
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...Qe2
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...Qxf2
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...Qd4
- 2.Qxd4#
- 1...Qd5
- 2.Sxd5#
- 2.Qxd5#
- 1...Qd6
- 2.Sd5#
- 2.Qxd6#
- 1...Qd7
- 2.Sd5#
- 1...Qxd8
- 2.Sd5#
- 1...Ra8
- 2.Sxb7#
- 1...Sc4
- 2.Rxc4#
- 1...Sb5
- 2.Rc4#
- 1...b5
- 2.Rc6#
- 1...b6
- 2.Rc6#
- 1...Qc1
- Tries
- 1.Qxd2?
- threat
- 2.Sd1#
- 2.Sf1#
- 2.Sxc2#
- 2.Sg2#
- 2.Sc4#
- 2.Sd5#
- 2.Sf5#
- 2.Qb4#
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...c1Q
- 2.Sd1#
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sc4#
- 2.Sd5#
- 2.Sf5#
- 2.Qb4#
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...c1S
- 2.Sd1#
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sc4#
- 2.Sd5#
- 2.Sf5#
- 2.Qb4#
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...c1B
- 2.Sd1#
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sc4#
- 2.Sd5#
- 2.Sf5#
- 2.Qb4#
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...c1R
- 2.Sd1#
- 2.Sf1#
- 2.Sc2#
- 2.Sg2#
- 2.Sc4#
- 2.Sd5#
- 2.Sf5#
- 2.Qb4#
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...Sc3
- 2.Sd1#
- 2.Sf1#
- 2.Sxc2#
- 2.Sg2#
- 2.Sd5#
- 2.Sf5#
- 2.Qd4#
- 2.Qd6#
- 1...Sc4
- 2.Sxc4#
- 2.Rxc4#
- 1...Sb5
- 2.Rc4#
- 2.Qb4#
- 2.Qd5#
- 1...a5
- 2.Sd1#
- 2.Sf1#
- 2.Sxc2#
- 2.Sg2#
- 2.Sc4#
- 2.Sd5#
- 2.Sf5#
- 2.Qd4#
- 2.Qd5#
- 2.Qd6#
- 1...Sxd2!
- threat
- 1.Qxd2?
- Keys
- 1.Qg4!
- threat
- 2.Qc8#
- 1...Qxe3+
- 2.Qg5#
- 1...Qxd8
- 2.Qb4#
- 1...Qd4
- 2.Qxd4#
- 1...Qd6
- 2.Qb4#
- 1...Sc4
- 2.Qxc4#
- 1...Qa5
- 2.Qd4#
- 2.Qg5#
- 1...Qd5
- 2.Qb4#
- 1...Qd7
- 2.Qb4#
- 1...Ra8
- 2.Sxb7#
- 1...Sb5
- 2.Qc4#
- 1...b5
- 2.Rc6#
- 1...b6
- 2.Rc6#
- threat
- 1.Qg4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(C)::B(B),XQ(c)
- Q(c);N_PINS(C),OGATE::QAB1(A),XQ(c)
- Q(c);N_PINS(C)::B(B)+S(C)
- Q(c);N_PINS(C),XS(H)::B(B)+S(C)
- R(h);N_GUARD::S(H),XP(i)
- S(d);N_GUARD::R1(E),XS(d)
- S(d);N_GUARD::R1(E)
- P(i);N_GUARD::R1(F)
- Tries
- Try
- Q(A);N_SPINS(C),XQ(c)
- Threat
- DUALS(11)
- Refutation
- S(a);XQ(A)
- Try
- Actual
- Q(A);
- Threat
- QAR(A)
- Vars
- Q(c);CHECK,N_GUARD,P_SPINQ(c),XS(C)::QAR(A)
- Q(c);N_GUARD,N_PINS(C),XS(H)::QAB1(A)
- Q(c);N_GUARD,N_PINS(C)::QAB1(A),XQ(c)
- Q(c);N_GUARD,N_PINS(C)::QAB1(A)
- S(d);N_GUARD::QAR1(A),XS(d)
- R(h);N_GUARD::S(H),XP(i)
- S(d);N_GUARD::QAR1(A)
- P(i);N_GUARD::R1(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).