MESON Chess Problem Database
Problem Display
PID: 137296 (1r2b3/2bR3q/n2pp3/1p1kr3/p2Np3/2R1P3/3N2B1/1K1Q4 w - - 0 1)
Ellerman, Arnoldo
2nd Prize, Europe Echecs, 1962
#2
8 + 12
SOLUTION
- SOUND
- Sets
- 1...a3
- 2.Qb3#
- 1...a3
- Tries
- 1.Sc2?
- threat
- 2.Sf1#
- 2.Sb3#
- 2.Sf3#
- 2.Sxe4#
- 1...Rf5
- 2.Sf3#
- 1...Rg5
- 2.Sf3#
- 1...Rh5
- 2.Sf3#
- 1...Sc5
- 2.Sb4#
- 1...Qh1
- 2.Sf1#
- 1...Qh5
- 2.Sf3#
- 1...Bh5
- 2.Sf3#
- 1...Sb4
- 2.Sxb4#
- 1...Bb6!
- threat
- 1.Se2?
- threat
- 2.Sf1#
- 2.Sb3#
- 2.Sf3#
- 2.Sxe4#
- 2.Sf4#
- 1...Rf5
- 2.Sf3#
- 1...Rg5
- 2.Sf3#
- 1...Rh5
- 2.Sf3#
- 1...Bb6
- 2.Sf4#
- 1...Qf5
- 2.Sf1#
- 2.Sb3#
- 2.Sf3#
- 2.Sxe4#
- 1...Qh1
- 2.Sf1#
- 2.Sf4#
- 1...Qh2
- 2.Sf1#
- 2.Sb3#
- 2.Sf3#
- 2.Sxe4#
- 1...Qh4
- 2.Sf1#
- 2.Sb3#
- 2.Sf3#
- 2.Sxe4#
- 1...Qh6
- 2.Sf1#
- 2.Sb3#
- 2.Sf3#
- 2.Sxe4#
- 1...Qf7
- 2.Sf1#
- 2.Sb3#
- 2.Sf3#
- 2.Sxe4#
- 1...Sb4
- 2.Sf4#
- 1...Sc5!
- threat
- 1.S4b3?
- threat
- 2.Sf1#
- 2.Sf3#
- 2.Sxe4#
- 1...Rf5
- 2.Sf3#
- 1...Rg5
- 2.Sf3#
- 1...Rh5
- 2.Sf3#
- 1...Sc5
- 2.Rxc5#
- 1...Qh1
- 2.Sf1#
- 1...Qh5
- 2.Sf3#
- 1...Bh5
- 2.Sf3#
- 1...Sb4
- 2.Rc5#
- 1...Bb6!
- threat
- 1.Sxb5?
- threat
- 2.Sf1#
- 2.Sb3#
- 2.Sf3#
- 2.Sxe4#
- 1...Rxb5+
- 2.Sb3#
- 1...Rf5
- 2.Sf3#
- 1...Rg5
- 2.Sf3#
- 1...Rh5
- 2.Sf3#
- 1...Bb6
- 2.Rxd6#
- 1...Qh1
- 2.Sf1#
- 1...Qh5
- 2.Sf3#
- 1...Bh5
- 2.Sf3#
- 1...Sb4
- 2.Sxc7#
- 1...Sc5!
- threat
- 1.Sc6?
- threat
- 2.Sf1#
- 2.Sb3#
- 2.Sf3#
- 2.Sxe4#
- 1...Sc5
- 2.Sb4#
- 1...Qh1
- 2.Sf1#
- 2.Se7#
- 1...Qh5
- 2.Sf3#
- 2.Se7#
- 1...Bh5
- 2.Sf3#
- 1...Sb4
- 2.Sxb4#
- 1...Bb6!
- threat
- 1.Sc2?
- Keys
- 1.Sxe4!
- threat
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sxb5#
- 2.Sf5#
- 2.Sc6#
- 1...Qxe4+
- 2.Sc2#
- 1...Rxe4
- 2.Sc6#
- 1...Rf5
- 2.Sc6#
- 1...Rg5
- 2.Sc6#
- 1...Rh5
- 2.Sc6#
- 1...Bb6
- 2.Rxd6#
- 1...Qf5
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sxb5#
- 2.Sxf5#
- 2.Sc6#
- 1...Qh1
- 2.Sf6#
- 1...Qh5
- 2.Se2#
- 2.Sf6#
- 1...Bh5
- 2.Se2#
- 1...Sb4
- 2.Rc5#
- 1...Sc5
- 2.Rxc5#
- 1...b4
- 2.Sc2#
- 2.Se2#
- 2.Sb3#
- 2.Sb5#
- 2.Sf5#
- 2.Sc6#
- threat
- 1.Sxe4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 10
- REMOVED MATES = 1
- Sets
- P(a);N_GUARD::QAB(B)
- Tries
- Try
- S(G);
- Threat
- DUALS(4)
- Vars
- R(e);::QAR(B)+S(C)
- S(f);N_GUARD::S(G)
- Q(j);P_PINQ(B)::QAR(B)+S(C)
- Q(j);::QAR(B)+S(C)
- B(l);::QAR(B)+S(C)
- S(f);N_GUARD::S(G),XS(f)
- Refutation
- B(i);
- Try
- S(G);
- Threat
- DUALS(5)
- Vars
- R(e);::QAR(B)+S(C)
- B(i);::S(G)
- S(f);::S(G)
- Refutation
- S(f);
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- R(e);::QAR(B)+S(C)
- S(f);N_GUARD::R1(E),XS(f)
- Q(j);P_PINQ(B)::QAR(B)+S(C)
- Q(j);::QAR(B)+S(C)
- B(l);::QAR(B)+S(C)
- S(f);N_GUARD::R1(E)
- Refutation
- B(i);
- Try
- S(G);P_SPINS(G),XP(c)
- Threat
- DUALS(4)
- Vars
- R(k);CHECK,XS(G)::QAR(B)+S(C)
- R(e);::QAR(B)+S(C)
- B(i);N_GUARD,N_PINS(G)::R1(H),XP(g)
- Q(j);P_PINQ(B)::QAR(B)+S(C)
- Q(j);::QAR(B)+S(C)
- B(l);::QAR(B)+S(C)
- S(f);N_PINS(G)::S(G),XB(i)
- Refutation
- S(f);
- Try
- S(G);
- Threat
- DUALS(4)
- Vars
- S(f);N_GUARD::S(G)
- B(l);::QAR(B)+S(C)
- S(f);N_GUARD::S(G),XS(f)
- Refutation
- B(i);
- Try
- Actual
- S(C);P_PINP(g),P_SPINS(C),XP(b)
- Threat
- DUALS(6)
- Vars
- Q(j);CHECK,P_SPINQ(j),XS(C)::QAR(B)+S(G)
- R(e);P_SPINR(e),XS(C)::QAR(B)+S(G)
- R(e);N_PINS(C)::QAR(B)+S(G)
- R(e);::QAR(B)+S(G)
- B(i);N_GUARD::R1(H),XP(g)
- Q(j);N_PINS(C),P_PINQ(B)::B(D)+S(C),DCHECK
- B(l);::QAR(B)+S(G)
- S(f);N_GUARD::R1(E)
- S(f);N_GUARD::R1(E),XS(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).