MESON Chess Problem Database
Problem Display
PID: 137524 (6BB/4rp2/p7/4P1p1/2NkN1Q1/1pR2n2/1K2R2p/n7 w - - 0 1)
Ellerman, Arnoldo
4th Prize, White-70 JT, 1950
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Rxe5
- 2.Qd7#
- 1...Rd7
- 2.Qxd7#
- 1...Re8
- 2.Qd7#
- 1...Sg1
- 2.Rd2#
- 1...Sd2
- 2.Rxd2#
- 1...Sh4
- 2.Rd2#
- 1...Sxe5
- 2.Rd2#
- 1...Rxe5
- Tries
- 1.Scd2?
- threat
- 2.Sf6#
- 1...Kd5
- 2.Sf6#
- 1...Rxe5
- 2.Qd7#
- 1...Sxd2
- 2.Rxd2#
- 1...f5
- 2.Sxf3#
- 1...f6
- 2.Sxf3#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sxf6#
- 1...Sxe5!
- threat
- 1.Sa3?
- threat
- 2.Sf6#
- 1...Kd5
- 2.Sf6#
- 1...Rxe5
- 2.Qd7#
- 1...Sxe5
- 2.Rd2#
- 1...Sd2
- 2.Rxd2#
- 1...f6
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sxf6#
- 1...f5!
- threat
- 1.Se3?
- threat
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 1...Sd2
- 2.Sxd2#
- 2.Rxd2#
- 1...f5
- 2.Sxf5#
- 1...f6!
- threat
- 1.Sb6?
- threat
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sf6#
- 1...Rxe5
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Qd7#
- 1...Sxe5
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Rd2#
- 1...f6
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sxf6#
- 1...Sd2
- 2.Sxd2#
- 2.Rxd2#
- 1...f5!
- threat
- 1.Scd6?
- threat
- 2.Sf6#
- 1...Kd5
- 2.Sf6#
- 1...Sxe5
- 2.Rd2#
- 1...f5
- 2.Sxf5#
- 1...Sd2
- 2.Rxd2#
- 1...f6
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sxf6#
- 1...Rxe5!
- threat
- 1.Sed2+?
- 1...Kd5
- 2.Se3#
- 2.Sb6#
- 1...Kc5!
- 1...Kd5
- 1.Sf2+?
- 1...Kd5
- 2.Se3#
- 2.Sb6#
- 1...Kc5!
- 1...Kd5
- 1.Sg3+?
- 1...Kd5
- 2.Se3#
- 2.Sb6#
- 1...Kc5!
- 1...Kd5
- 1.Sxg5+?
- 1...Kd5
- 2.Se3#
- 2.Sb6#
- 1...Kc5!
- 1...Kd5
- 1.Sed6+?
- 1...Kd5
- 2.Se3#
- 2.Sb6#
- 1...Kc5!
- 1...Kd5
- 1.e6+?
- 1...Kd5
- 2.Se3#
- 2.Sb6#
- 1...Se5
- 2.Rd2#
- 1...f6!
- 1...Kd5
- 1.Scd2?
- Keys
- 1.Sa5!
- threat
- 2.Sf6#
- 1...Kd5
- 2.Sf6#
- 1...Rxe5
- 2.Qd7#
- 1...Sxe5
- 2.Rd2#
- 1...Sd2
- 2.Rxd2#
- 1...f5
- 2.Sc6#
- 1...f6
- 2.Sd2#
- 2.Sf2#
- 2.Sg3#
- 2.Sc5#
- 2.Sxg5#
- 2.Sd6#
- 2.Sxf6#
- 2.Sc6#
- threat
- 1.Sa5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 4
- Sets
- R(h);N_GUARD,P_SPINR(h),XP(G)::QAR(F)
- R(h);N_GUARD::QAR(F),XR(h)
- R(h);N_GUARD::QAR(F)
- S(d);N_GUARD::R(B)
- S(d);N_GUARD::R(B),XS(d)
- S(d);N_GUARD,P_SPINS(d),XP(G)::R(B)
- Tries
- Try
- S(D);
- Threat
- QAR(F)+S(E)
- Vars
- K(e);P-FLIGHT,P_SPINP(i)::S(E)
- R(h);N_GUARD,P_SPINR(h),XP(G)::QAR(F)
- S(d);OGATE,XS(D)::R(B),XS(d)
- P(i);::S(D),XS(d)
- Refutation
- S(d);P_SPINS(d),XP(G)
- Try
- S(D);
- Threat
- QAR(F)+S(E)
- Vars
- K(e);P-FLIGHT,P_SPINP(i)::S(E)
- R(h);N_GUARD,P_SPINR(h),XP(G)::QAR(F)
- S(d);N_GUARD,P_SPINS(d),XP(G)::R(B)
- S(d);N_GUARD::R(B),XS(d)
- Refutation
- P(i);
- Try
- S(D);
- Threat
- DUALS(6)
- Vars
- P(i);::S(D),XP(i)
- Refutation
- P(i);
- Try
- S(D);
- Threat
- DUALS(7)
- Refutation
- P(i);
- Try
- S(D);
- Threat
- QAR(F)+S(E)
- Vars
- K(e);P-FLIGHT,P_SPINP(i)::S(E)
- S(d);N_GUARD,P_SPINS(d),XP(G)::R(B)
- P(i);::S(D),XP(i)
- S(d);N_GUARD::R(B),XS(d)
- Refutation
- R(h);P_SPINR(h),XP(G)
- Try
- S(E);CHECK
- Refutation
- K(e);S_FLIGHT
- Try
- S(E);CHECK
- Refutation
- K(e);S_FLIGHT
- Try
- S(E);CHECK
- Refutation
- K(e);S_FLIGHT
- Try
- S(E);CHECK,XP(f)
- Refutation
- K(e);S_FLIGHT
- Try
- S(E);CHECK
- Refutation
- K(e);S_FLIGHT
- Try
- P(G);CHECK
- Vars
- S(d);P_SPINS(d)::R(B)
- Refutation
- P(i);P_SPINP(i)
- Try
- Actual
- S(D);
- Threat
- QAR(F)+S(E)
- Vars
- K(e);P-FLIGHT,P_SPINP(i)::S(E)
- R(h);N_GUARD,P_SPINR(h),XP(G)::QAR(F)
- S(d);N_GUARD,P_SPINS(d),XP(G)::R(B)
- S(d);N_GUARD::R(B),XS(d)
- P(i);::S(D)
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).