MESON Chess Problem Database
Problem Display
PID: 183049 (2rR2BK/r6p/5P2/1Nq4p/R1pPkBP1/2Qn3N/3nP3/8 w - - 0 1)
Ellerman, Arnoldo
Bulletin Ouvrier des Echecs, 1953
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Qa3
- 2.Bd5#
- 1...Qb4
- 2.Bd5#
- 1...Qxd4
- 2.Rxd4#
- 2.Qxd4#
- 1...Qb6
- 2.Bd5#
- 1...Qd6
- 2.Sxd6#
- 1...Qe7
- 2.Bd5#
- 1...Qd5
- 2.Bxd5#
- 1...Qf5
- 2.Sd6#
- 1...Qg5
- 2.Sd6#
- 1...Qc7
- 2.Bd5#
- 1...Sc1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sb2
- 2.Qe3#
- 1...Sf2
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...Sxf4
- 2.Sf2#
- 1...Se5
- 2.Qe3#
- 1...Qa3
- Tries
- 1.Sf2+?
- 1...Sxf2
- 2.Qe3#
- 1...Kxf4!
- 1...Sxf2
- 1.Bxh7+?
- 1...Qf5
- 2.Bxf5#
- 1...Rxh7+!
- 1...Qf5
- 1.Rxc4?
- threat
- 2.Qxd3#
- 1...Qxc4
- 2.Sd6#
- 1...Sxf4
- 2.Sf2#
- 1...Qa3
- 2.Bd5#
- 1...Sc1
- 2.Qe3#
- 1...Se1
- 2.Qe3#
- 1...Sb2
- 2.Qe3#
- 1...Sf2
- 2.Qe3#
- 1...Sb4
- 2.Qe3#
- 1...Se5
- 2.Qe3#
- 1...Ra3!
- threat
- 1.Qxd2?
- threat
- 2.Sc3#
- 2.Qe3#
- 1...Qxd4
- 2.Sg5#
- 2.Rxd4#
- 1...Qxb5
- 2.Qe3#
- 1...Rxd8
- 2.Qe3#
- 1...Sxf4
- 2.Sf2#
- 2.Sc3#
- 2.Qxf4#
- 1...Qa3
- 2.Sg5#
- 2.Bd5#
- 2.Qe3#
- 1...Qb4
- 2.Sg5#
- 2.Bd5#
- 2.Qe3#
- 1...Qd6
- 2.Sg5#
- 2.Qe3#
- 1...Qd5
- 2.Bxd5#
- 2.Qe3#
- 1...Rd7
- 2.Qe3#
- 1...c3
- 2.Qe3#
- 2.Qxd3#
- 1...hxg4!
- threat
- 1.Sf2+?
- Keys
- 1.d5!
- threat
- 2.Qxd3#
- 1...Qxd5
- 2.Bxd5#
- 1...Rxa4
- 2.Bxh7#
- 1...Sxf4
- 2.Sg5#
- 1...Qa3
- 2.Qd4#
- 1...Qe3
- 2.Sd6#
- 1...Qb4
- 2.Qd4#
- 1...Qd4
- 2.Sd6#
- 2.Qxd4#
- 1...Sc1
- 2.Qe5#
- 1...Se1
- 2.Qe5#
- 1...Sb2
- 2.Qe5#
- 1...Sf2
- 2.Qe5#
- 1...Sb4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- threat
- 1.d5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 9
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- Q(e);N_GUARD::B(K)
- Q(e);N_GUARD::S(H),XQ(e)
- Q(e);N_GUARD::B(K),XQ(e)
- Q(e);N_GUARD::S(H)
- S(b);OGATE::QAR1(B)
- S(b);N_GUARD,SBLOCK,XB(F)::S(C)
- Tries
- Try
- S(C);CHECK
- Vars
- S(b);OGATE,XS(C)::QAR1(B)
- Refutation
- K(d);P-FLIGHT,XB(F)
- Try
- B(K);CHECK,P_SPINR(J),XP(h)
- Vars
- Q(e);N_GUARD,P_SPINQ(e)::B(K),XQ(e)
- Refutation
- R(g);CHECK,XB(K)
- Try
- R(D);XP(c)
- Threat
- QAB1(B),XS(b)
- Vars
- Q(e);N_GUARD,XR(D)::S(H)
- S(b);N_GUARD,SBLOCK,XB(F)::S(C)
- Q(e);N_GUARD::B(K)
- S(b);OGATE::QAR1(B)
- Refutation
- R(g);
- Try
- Q(B);XS(a)
- Threat
- DUALS(2)
- Vars
- Q(e);XS(H)::QAR1(B)
- R(i);P_PINB(K),XR(J)::QAR1(B)
- R(g);::QAR1(B)
- Refutation
- P(f);XP(G)
- Try
- Actual
- P(E);P_PINP(c)
- Threat
- QAB1(B),XS(b)
- Vars
- Q(e);OGATE,XP(E)::B(K),XQ(e)
- R(g);N_GUARD,N_SPINP(c),XR(D)::B(K),XP(h)
- S(b);SBLOCK,XB(F)::S(C)
- Q(e);N_GUARD::QAR1(B)
- Q(e);N_GUARD::S(H)
- Q(e);N_GUARD,N_SPINP(c)::QAR1(B)
- S(b);N_GUARD::QAR1(B)
- S(b);N_GUARD,N_SPINP(c)::QAR1(B)
- S(b);N_GUARD::QAR1(B),XS(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).