MESON Chess Problem Database
Problem Display
PID: 139807 (1B4n1/8/4p3/pK1k1p2/2Nr1P2/1BPq2N1/r5R1/1b1R2bQ w - - 0 1)
Ellerman, Arnoldo
Problemas, 1945
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Se3#
- 2.Sb6#
- 2.Rxc2#
- 1...Qxc4+
- 2.Bxc4#
- 1...Qe4
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Qxd1
- 2.Se3#
- 2.Sb6#
- 1...Qd2
- 2.Se3#
- 2.Sb6#
- 1...Qxc3
- 2.Se3#
- 2.Sb6#
- 1...Qe3
- 2.Sb2#
- 2.Sa3#
- 2.Sxe3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Qf3
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Qxg3
- 2.Sd6#
- 1...Rxc4
- 2.Bxc4#
- 2.Rxa2#
- 2.Rb2#
- 2.Rc2#
- 2.Rgd2#
- 2.Re2#
- 2.Rf2#
- 1...Qc2
- Tries
- 1.Rxd3?
- threat
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rxa2#
- 2.Rb2#
- 2.Rc2#
- 2.Rgd2#
- 2.Re2#
- 2.Rf2#
- 1...Rxg2
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Qxg2#
- 1...Rxd3
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rd2#
- 1...e5
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Sxe5#
- 2.Sb6#
- 2.Sd6#
- 1...Ra1
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rxg1#
- 2.Ra2#
- 2.Rb2#
- 2.Rc2#
- 2.Rgd2#
- 2.Re2#
- 2.Rf2#
- 2.Rh2#
- 1...Rb2
- 2.Sxb2#
- 2.Se3#
- 2.Sb6#
- 2.Rxb2#
- 2.Rc2#
- 2.Rgd2#
- 2.Re2#
- 2.Rf2#
- 1...Rc2
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rxc2#
- 2.Rgd2#
- 2.Re2#
- 2.Rf2#
- 1...Rd2
- 2.Sb2#
- 2.Sxd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rgxd2#
- 2.Re2#
- 2.Rf2#
- 1...Re2
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rxe2#
- 1...Rf2
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rxf2#
- 2.Rxd4#
- 1...Ra3
- 2.Sxa3#
- 2.Se3#
- 2.Sb6#
- 2.Rxg1#
- 2.Ra2#
- 2.Rb2#
- 2.Rc2#
- 2.Rgd2#
- 2.Re2#
- 2.Rf2#
- 2.Rh2#
- 1...Ra4
- 2.Se3#
- 2.Sb6#
- 2.Rxg1#
- 2.Ra2#
- 2.Rb2#
- 2.Rc2#
- 2.Rgd2#
- 2.Re2#
- 2.Rf2#
- 2.Rh2#
- 1...Bc2
- 2.Se3#
- 2.Sb6#
- 2.Rxg1#
- 2.Rxc2#
- 2.Rgd2#
- 2.Re2#
- 2.Rf2#
- 2.Rh2#
- 1...Bf2
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rg1#
- 2.Rxf2#
- 2.Rh2#
- 1...Be3
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Sxe3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rxa2#
- 2.Rb2#
- 2.Rc2#
- 2.Rgd2#
- 2.Re2#
- 2.Rf2#
- 1...Sf6
- 2.Sb2#
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...a4
- 2.Se3#
- 2.Sb6#
- 2.Rxa2#
- 2.Rb2#
- 2.Rc2#
- 2.Rgd2#
- 2.Re2#
- 2.Rf2#
- 1...Bxd3!
- threat
- 1.Rxa2+?
- 1...Qe4
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Qf3
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Re4!
- 1...Qe4
- 1.Rb2+?
- 1...Qe4
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Qf3
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Re4!
- 1...Qe4
- 1.Rc2+?
- 1...Qe4
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Qf3
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Qxf3#
- 1...Re4!
- 1...Qe4
- 1.Rgd2+?
- 1...Qe4
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Qf3
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Re4!
- 1...Qe4
- 1.Re2+?
- 1...Qe4
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...Qf3
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Re5#
- 1...Re4!
- 1...Qe4
- 1.Rf2+?
- 1...Qe4
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rxd4#
- 1...Qf3
- 2.Sb2#
- 2.Sa3#
- 2.Se3#
- 2.Sxa5#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 2.Rxd4#
- 1...Re4!
- 1...Qe4
- 1.Qh7?
- threat
- 2.Qb7#
- 2.Qd7#
- 1...Qxc4+
- 2.Bxc4#
- 1...Qxg3
- 2.Sd6#
- 2.Qb7#
- 1...e5
- 2.Qxg8#
- 2.Qd7#
- 2.Qf7#
- 1...Sf6
- 2.Qb7#
- 1...Se7!
- threat
- 1.Rxd3?
- Keys
- 1.Kb6!
- threat
- 2.Se3#
- 1...Rxc4+
- 2.Rf2#
- 1...Qxc4
- 2.Rc2#
- 1...Qxg3
- 2.Sd6#
- 1...Qe3
- 2.Sb2#
- 2.Sa3#
- 2.Sxe3#
- 2.Sxa5#
- 2.Se5#
- 2.Sd6#
- 1...Be3
- 2.Sxe3#
- threat
- 1.Kb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(d);CHECK,OGATE,P_SPINQ(d),P_SPINR(e),XS(G)::B(D),XQ(d)
- Q(d);N_PINS(G),P_SPINR(e),XS(F)::B(D)+S(G)
- Tries
- Try
- R(A);N_SPINS(G),P_PINR(e),XQ(d)
- Threat
- DUALS(14)
- Refutation
- B(a);N_SPINR(e),P_PINS(G),XR(A)
- Try
- R(C);CHECK,XR(c)
- Refutation
- R(e);P_SPINQ(d),P_SPINR(e)
- Try
- R(C);CHECK
- Refutation
- R(e);P_SPINQ(d),P_SPINR(e)
- Try
- R(C);CHECK
- Refutation
- R(e);P_SPINQ(d),P_SPINR(e)
- Try
- R(C);CHECK
- Refutation
- R(e);P_SPINQ(d),P_SPINR(e)
- Try
- R(C);CHECK
- Refutation
- R(e);P_SPINQ(d),P_SPINR(e)
- Try
- R(C);CHECK
- Refutation
- R(e);P_SPINQ(d),P_SPINR(e)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,OGATE,P_SPINQ(d),P_SPINR(e),XS(G)::B(D),XQ(d)
- S(j);::QAB(B)
- Refutation
- S(j);
- Try
- Actual
- K(I);N_SPINS(G),P-FLIGHT
- Threat
- B(D)+S(G),DCHECK
- Vars
- R(e);CHECK,N_GUARD,P_SPINQ(d),P_SPINR(e),XS(G)::QAB(B)+R(C)
- Q(d);N_GUARD,P_SPINQ(d),P_SPINR(e),XS(G)::QAB(B)+R(C)
- Q(d);N_GUARD,P_SPINR(e),XS(F)::B(D)+S(G)
- B(b);::B(D)+S(G),DCHECK,XB(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).