MESON Chess Problem Database
Problem Display
PID: 59539 (6r1/5Bbp/8/2P1N1R1/Rnq1k3/3N2P1/3PK1P1/1Q4B1 w - - 0 1)
Ellerman, Arnoldo
5th HM., Brisbane Courier, 1922-1923
#2
12 + 6
SOLUTION
- SOUND
- Sets
- 1...Qxd3+
- 2.Qxd3#
- 1...Qe6
- 2.Sxb4#
- 2.Sf4#
- 1...Qxf7
- 2.Sxb4#
- 2.Sf4#
- 1...Qc1
- 2.Sxc1#
- 1...Qd4
- 2.Sf2#
- 1...Qxc5
- 2.Sxc5#
- 1...Bxe5
- 2.Rxe5#
- 1...Sa2
- 2.Rxc4#
- 2.Qb7#
- 1...Sc2
- 2.Qb7#
- 1...Sxd3
- 2.Rxc4#
- 2.Qxd3#
- 2.Qb7#
- 1...Sd5
- 2.Rxc4#
- 1...Sa6
- 2.Rxc4#
- 2.Qb7#
- 1...Qxd3+
- Tries
- 1.Sxc4?
- threat
- 2.Sxb4#
- 2.Sd6#
- 1...Sxd3
- 2.Se5#
- 2.Sd6#
- 2.Bd5#
- 2.Qxd3#
- 2.Qb7#
- 1...Be5
- 2.Sxb4#
- 2.Rxe5#
- 1...Bf8
- 2.Sxb4#
- 2.Re5#
- 1...Sa2
- 2.Sc1#
- 2.Se1#
- 2.Sdb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sde5#
- 2.Sd6#
- 2.Bd5#
- 2.Qb7#
- 1...Sc2
- 2.Sd6#
- 2.Bd5#
- 2.Qb7#
- 1...Sd5
- 2.Sc1#
- 2.Se1#
- 2.Sdb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sde5#
- 2.Sd6#
- 2.Bxd5#
- 1...Sa6
- 2.Sc1#
- 2.Se1#
- 2.Sdb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sde5#
- 2.Sd6#
- 2.Bd5#
- 2.Qb7#
- 1...Sc6
- 2.Sc1#
- 2.Se1#
- 2.Sdb2#
- 2.Sb4#
- 2.Sf4#
- 2.Sde5#
- 2.Sd6#
- 2.Bd5#
- 1...Rd8!
- threat
- 1.Bxc4?
- threat
- 2.Sxb4#
- 1...Sxd3
- 2.Ba2#
- 2.Bb3#
- 2.Be6#
- 2.Bf7#
- 2.Bxg8#
- 2.Qxd3#
- 2.Qb7#
- 1...Sa2
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Bxa2#
- 2.Qb7#
- 1...Sc2
- 2.Qb7#
- 1...Sd5
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 1...Sa6
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 2.Qb7#
- 1...Sc6
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sb4#
- 2.Sf4#
- 1...Rd8!
- threat
- 1.Rxb4?
- threat
- 2.Rxc4#
- 1...Qxb4
- 2.Sb2#
- 2.Sxb4#
- 2.Qxb4#
- 1...Bxe5
- 2.Rxe5#
- 1...Qd4
- 2.Sc1#
- 2.Se1#
- 2.Sb2#
- 2.Sf2#
- 2.Sf4#
- 2.Rxd4#
- 1...Rd8!
- threat
- 1.Qxb4?
- threat
- 2.Qxc4#
- 2.Qb7#
- 1...Qxb4
- 2.Rxb4#
- 1...Bxe5
- 2.Rxe5#
- 2.Qb7#
- 1...Qd4
- 2.Sf2#
- 2.Qxd4#
- 2.Qb7#
- 1...Rb8
- 2.Qxc4#
- 1...Rc8
- 2.Qxc4#
- 1...Rd8!
- threat
- 1.Sxc4?
- Keys
- 1.Kf1!
- threat
- 2.Qe1#
- 1...Qxd3+
- 2.Qxd3#
- 1...Qxf7+
- 2.Sf4#
- 1...Qc1+
- 2.Sxc1#
- 1...Qxc5
- 2.Sxc5#
- 1...Bxe5
- 2.Rxe5#
- 1...Sxd3
- 2.Rxc4#
- 2.Qxd3#
- 2.Qb7#
- 1...Qe6
- 2.Sxb4#
- 2.Sf4#
- 1...Qd4
- 2.Sf2#
- 1...Sc2
- 2.Qb7#
- 1...Sd5
- 2.Rxc4#
- threat
- 1.Kf1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(b);CHECK,OGATE,P_SPINQ(b),P_SPINS(a),XS(F)::QAB1(A),XQ(b)
- Q(b);N_PINS(F),P_SPINS(a)::QAB(A)+S(F),XQ(b)
- Q(b);N_PINS(F),SBLOCK::QAB(A)+S(F),DCHECK
- Q(b);N_PINS(F),P_SPINS(a),XP(I)::QAB(A)+S(F),DCHECK,XQ(b)
- B(d);OGATE,XS(J)::R1(K),XB(d)
- S(a);OGATE,P_SPINQ(b)::QAB(A)
- S(a);OGATE,P_SPINQ(b)::R(H),XQ(b)
- Tries
- Try
- S(J);N_SPINS(F),XQ(b)
- Threat
- DUALS(2)
- Refutation
- R(f);
- Try
- B(L);N_SPINS(F),XQ(b)
- Threat
- QAB(A)+S(F),XS(a)
- Vars
- S(a);OGATE::QAB(A)
- Refutation
- R(f);
- Try
- R(H);P_PINQ(b),XS(a)
- Threat
- R(H),XQ(b)
- Vars
- B(d);OGATE,XS(J)::R1(K),XB(d)
- Refutation
- R(f);
- Try
- Q(A);P_PINQ(b),XS(a)
- Threat
- DUALS(2)
- Vars
- Q(b);N_PINS(F),OGATE,XQ(A)::R(H),XQ(b)
- R(f);::QAR2(A),XQ(b)
- Refutation
- R(f);
- Try
- Actual
- K(D);S_FLIGHT
- Threat
- QAR(A)
- Vars
- Q(b);CHECK,OGATE,P_SPINQ(b),P_SPINS(a),XS(F)::QAB1(A),XQ(b)
- Q(b);CHECK,N_PINS(F),P_SPINS(a),XB(L)::QAB(A)+S(F)
- Q(b);CHECK,N_PINS(F),P_SPINS(a)::QAB(A)+S(F),XQ(b)
- Q(b);N_PINS(F),P_SPINS(a),XP(I)::QAB(A)+S(F),DCHECK,XQ(b)
- B(d);OGATE,XS(J)::R1(K),XB(d)
- Q(b);N_PINS(F),SBLOCK::QAB(A)+S(F),DCHECK
- S(a);OGATE,P_SPINQ(b)::QAB(A)
- S(a);OGATE,P_SPINQ(b)::R(H),XQ(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).