MESON Chess Problem Database
Problem Display
PID: 237718 (B1q4r/3PN3/b2P2Rp/Nn2kp1r/nRpp4/7p/2QB4/2K5 w - - 0 1)
Ellerman, Arnoldo
Arbejder-Skak, 1947
#2
10 + 12
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qb7
- 2.Sxc4#
- 1...Qxd7
- 2.Sxc4#
- 1...Qc6
- 2.Saxc6#
- 1...Qxa8
- 2.Sxc4#
- 1...Qb8
- 2.Sxc4#
- 2.Sac6#
- 1...Qd8
- 2.Sxc4#
- 2.Sac6#
- 1...Qe8
- 2.Sxc4#
- 2.Sac6#
- 1...Qf8
- 2.Sxc4#
- 2.Sac6#
- 1...Qg8
- 2.Sac6#
- 1...Rh4
- 2.Qxf5#
- 1...Sc5
- 2.Sxc4#
- 1...Sc7
- 2.Sac6#
- 1...f4
- 2.Qe4#
- 1...Qb7
- Tries
- 1.Bd5?
- threat
- 2.Re6#
- 1...Qxd7
- 2.Sxc4#
- 1...Qg8
- 2.Sxc4#
- 2.Sac6#
- 1...Sc5
- 2.Sxc4#
- 1...Sc7
- 2.Sac6#
- 1...d3!
- threat
- 1.Rxb5+?
- 1...Qc5
- 2.Sxc4#
- 2.Sac6#
- 1...Sc5
- 2.Sxc4#
- 1...Bxb5!
- 1...Qc5
- 1.dxc8Q?
- threat
- 2.Sxc4#
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 2.Qxh8#
- 1...Bxc8
- 2.Sxc4#
- 2.Sac6#
- 1...Sxd6
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 2.Qxh8#
- 1...d3
- 2.Qxh8#
- 1...Rh7
- 2.Sxc4#
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 1...Rd8
- 2.Sxc4#
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 1...Re8
- 2.Sxc4#
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 1...Rf8
- 2.Sxc4#
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 1...Rg8
- 2.Sxc4#
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 1...Bb7
- 2.Sxc4#
- 2.Re6#
- 2.Qe6#
- 2.Qxh8#
- 1...Sb2
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 2.Qc5#
- 2.Qxh8#
- 1...Sc5
- 2.Sxc4#
- 2.Sac6#
- 2.Qxc5#
- 2.Qxh8#
- 1...Sb6
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 2.Qxh8#
- 1...Sa3
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 2.Qxh8#
- 1...Sbc3
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 2.Qxh8#
- 1...Sa7
- 2.Re6#
- 2.Qe6#
- 2.Qxh8#
- 1...Sc7
- 2.Sac6#
- 2.Qxh8#
- 1...c3
- 2.Sc4#
- 2.Sac6#
- 2.Re6#
- 2.Qe6#
- 2.Qxh8#
- 1...Rxc8!
- threat
- 1.Bd5?
- Keys
- 1.Qxc4!
- threat
- 2.Re6#
- 1...Qxc4+
- 2.Sxc4#
- 1...Qxd7
- 2.Qe2#
- 2.Qd5#
- 1...Qg8
- 2.Qe2#
- 1...Sc5
- 2.Qd5#
- 1...Sc7
- 2.Qxd4#
- threat
- 1.Qxc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 6
- Sets
- Q(k);N_GUARD::S(E),XP(c)
- Q(k);N_GUARD,XP(H)::S(E),XP(c)
- Q(k);N_GUARD::S(E),XQ(k)
- Q(k);N_GUARD,XB(J)::S(E),XP(c)
- Q(k);N_GUARD::S(E)
- R(h);N_GUARD::QAR1(B),XP(g)
- S(b);S_CUTQ(k)::S(E),XP(c)
- S(e);S_CUTQ(k)::S(E)
- P(g);N_GUARD::QAR1(B)
- Tries
- Try
- B(J);
- Threat
- R1(G)
- Vars
- Q(k);N_GUARD,XP(H)::S(E),XP(c)
- S(b);S_CUTQ(k)::S(E),XP(c)
- S(e);S_CUTQ(k)::S(E)
- Refutation
- P(d);
- Try
- R(D);CHECK,XS(e)
- Vars
- S(b);P_SPINS(b)::S(E),XP(c)
- Refutation
- B(i);XR(D)
- Try
- P(H);XQ(k)
- Threat
- DUALS(5)
- Vars
- P(d);::QAB(H),XR(l)
- Refutation
- R(l);XQ(H)
- Try
- Actual
- Q(B);P_SPINQ(B),XP(c)
- Threat
- R1(G)
- Vars
- Q(k);CHECK,XQ(B)::S(E),XQ(k)
- Q(k);N_PINQ(B)::QAR(B)
- S(b);N_PINQ(B)::QAR1(B)
- S(e);N_PINQ(B)::QAB1(B),XP(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).