MESON Chess Problem Database
Problem Display
PID: 83750 (4B3/BK6/PNNQ4/rk6/4q1R1/2np4/p1Pbp3/1b1n4 w - - 0 1)
Ellerman, Arnoldo
L'Italia Scacchistica, 1925
#2
9 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Rb4#
- 2.Qb4#
- 1...Qg2
- 2.Rb4#
- 2.Qb4#
- 1...Qf3
- 2.Rb4#
- 2.Qb4#
- 1...Qd5
- 2.Rb4#
- 2.Qb4#
- 1...Qf5
- 2.Sd4#
- 2.Rb4#
- 2.Qb4#
- 1...Qxc6+
- 2.Bxc6#
- 2.Qxc6#
- 1...Qg6
- 2.Sd4#
- 2.Rb4#
- 2.Qb4#
- 1...Qh7+
- 2.Se7#
- 1...Qe3
- 2.Sd4#
- 2.Se5#
- 2.Se7#
- 2.Rb4#
- 2.Qb4#
- 1...Qa4
- 2.Sb4#
- 2.Sd4#
- 2.Se5#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 1...Qb4
- 2.Sxb4#
- 2.Sd4#
- 2.Se5#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Rxb4#
- 2.Qxb4#
- 1...Qc4
- 2.Sd4#
- 1...Qd4
- 2.Sb4#
- 2.Sxd4#
- 2.Se5#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 1...Qf4
- 2.Sb4#
- 2.Sd4#
- 2.Se5#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 1...Qxg4
- 2.Sd4#
- 1...Qe5
- 2.Sd4#
- 2.Sxe5#
- 2.Se7#
- 2.Rb4#
- 2.Qb4#
- 1...Qe6
- 2.Sd4#
- 2.Rb4#
- 2.Qb4#
- 1...Qe7+
- 2.Sxe7#
- 1...Qxe8
- 2.Sd4#
- 2.Rb4#
- 2.Qb4#
- 1...Sd5
- 2.Sd4#
- 2.Se5#
- 2.Se7#
- 1...Qh1
- Tries
- 1.Rxe4?
- threat
- 2.Sb4#
- 2.Sd4#
- 2.Se5#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Rb4#
- 2.Qb4#
- 1...Rxa6
- 2.Rb4#
- 2.Qb4#
- 1...Sxe4
- 2.Sb4#
- 2.Sd4#
- 2.Se5#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.c4#
- 1...Ra3
- 2.Rb4#
- 2.Qb4#
- 1...Sa4
- 2.Sb4#
- 2.Sd4#
- 2.Se5#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.c4#
- 1...Sd5
- 2.Sb4#
- 2.Sd4#
- 2.Se5#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qxd5#
- 2.c4#
- 1...Ra4!
- threat
- 1.Rg5+?
- 1...Qd5
- 2.Qb4#
- 1...Qf5
- 2.Sb4#
- 2.Sd4#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qb4#
- 1...Qe5
- 2.Sb4#
- 2.Sd4#
- 2.Sxe5#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qb4#
- 1...Sd5
- 2.Sd4#
- 2.Se5#
- 2.Se7#
- 1...Bxg5!
- 1...Qd5
- 1.Qxd3+?
- 1...Kc5
- 2.Sa4#
- 2.Sd7#
- 2.Sa8#
- 2.Sc8#
- 1...Qc4
- 2.Qxc4#
- 1...Qxd3!
- 1...Kc5
- 1.Rxe4?
- Keys
- 1.Sc4!
- threat
- 2.Qb4#
- 1...Qxc6+
- 2.Bxc6#
- 1...Qh7+
- 2.Se7#
- 1...Qe7+
- 2.Sxe7#
- 1...Ka4
- 2.Qb4#
- 1...Kxc4
- 2.Qxd3#
- 1...Qxc4
- 2.Sd4#
- 1...Ra4
- 2.Qc5#
- 1...Sa4
- 2.Sa3#
- 1...Sd5
- 2.S6e5#
- threat
- 1.Sc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 1
- Sets
- Q(h);CHECK,N_PINS(E)::B(I)+S(E)
- Q(h);N_PINS(E)::B(I)+S(E),DCHECK
- Q(h);N_PINS(E),XR(B)::B(I)+S(E),DCHECK
- Q(h);CHECK,N_PINS(E)::B(I)+S(E),XQ(h)
- Tries
- Try
- R(B);N_SPINS(E),XQ(h)
- Threat
- DUALS(8)
- Refutation
- R(i);
- Try
- R(B);CHECK
- Vars
- Q(h);P_SPINQ(h)::QAR1(F)
- Refutation
- B(d);XR(B)
- Try
- Q(F);CHECK,XP(g)
- Vars
- Q(h);N_GUARD,N_PINS(E),P_SPINQ(h)::QAB1(F),XQ(h)
- Refutation
- Q(h);N_PINS(E),XQ(F)
- Try
- Actual
- S(D);
- Threat
- QAR1(F)
- Vars
- Q(h);CHECK,OGATE,P_SPINQ(h),XS(E)::B(I),XQ(h)
- Q(h);CHECK,N_PINS(E)::B(I)+S(E)
- Q(h);CHECK,N_PINS(E)::B(I)+S(E),XQ(h)
- K(j);S_FLIGHT::QAR1(F)
- K(j);OGATEB,P_SPINQ(h),S_FLIGHT,XS(D)::QAB1(F),XP(g)
- Q(h);N_PINS(E),SBLOCK,XS(D)::B(I)+S(E),DCHECK
- R(i);SBLOCK::QAR1(F)
- S(f);SBLOCK,S_CUTR(i)::S(D)
- S(f);N_PINS(E)::B(I)+S(E)
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).