MESON Chess Problem Database
Problem Display
PID: 237732 (4nQ2/1p1NPp1r/2P1k3/4B2p/nK1R2rN/2p4B/8/5R2 w - - 0 1)
Ellerman, Arnoldo
Arbejder-Skak, 1949
#2
10 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rh6
- 2.Qxf7#
- 1...Rh8
- 2.Qxf7#
- 1...Sd6
- 2.Rf6#
- 1...Sf6
- 2.Rxf6#
- 1...Sc7
- 2.Rf6#
- 1...Sg7
- 2.Rf6#
- 2.Qxf7#
- 1...Rh6
- Tries
- 1.Bxg4+?
- 1...f5
- 2.Bxf5#
- 1...hxg4!
- 1...f5
- 1.Bh2?
- threat
- 2.Re1#
- 1...Sc5
- 2.Sxc5#
- 1...Sd6
- 2.Rf6#
- 1...Sf6
- 2.Rxf6#
- 1...f5!
- threat
- 1.Bg3?
- threat
- 2.Re1#
- 1...Sc5
- 2.Sxc5#
- 1...Sd6
- 2.Rf6#
- 1...Sf6
- 2.Rxf6#
- 1...f5!
- threat
- 1.Bf4?
- threat
- 2.Re1#
- 1...Sd6
- 2.Rxd6#
- 1...Sf6
- 2.Rd6#
- 1...Sc5!
- threat
- 1.Bd6?
- threat
- 2.Re1#
- 1...Sxd6
- 2.Rf6#
- 1...Sc5
- 2.Sxc5#
- 1...Sf6
- 2.Rxf6#
- 1...f5
- 2.Qxf5#
- 1...bxc6!
- threat
- 1.Bf6?
- threat
- 2.Re1#
- 1...Sxf6
- 2.Rxf6#
- 1...Sc5
- 2.Sxc5#
- 1...Sd6!
- threat
- 1.Bc7?
- threat
- 2.Re1#
- 1...Sc5
- 2.Sxc5#
- 1...Sd6
- 2.Rf6#
- 1...Sf6
- 2.Rxf6#
- 1...f5!
- threat
- 1.Bg7?
- threat
- 2.Re1#
- 2.Qxf7#
- 1...Rxg7
- 2.Re1#
- 1...Sc5
- 2.Sxc5#
- 2.Qxf7#
- 1...Sd6
- 2.Rf6#
- 1...Sf6
- 2.Rxf6#
- 1...f6
- 2.Re1#
- 1...f5!
- threat
- 1.Bb8?
- threat
- 2.Re1#
- 1...Sc5
- 2.Sxc5#
- 1...Sd6
- 2.Rf6#
- 1...Sf6
- 2.Rxf6#
- 1...f5!
- threat
- 1.Bh8?
- threat
- 2.Re1#
- 1...Sc5
- 2.Sxc5#
- 1...Sd6
- 2.Rf6#
- 1...Sf6
- 2.Rxf6#
- 1...f5!
- threat
- 1.Qxe8?
- threat
- 2.Rf6#
- 1...Rh6
- 2.Qxf7#
- 1...f6
- 2.Rxf6#
- 1...f5!
- threat
- 1.Bxg4+?
- Keys
- 1.Re1!
- threat
- 2.Bh2#
- 2.Bg3#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bg7#
- 2.Bb8#
- 2.Bh8#
- 1...bxc6
- 2.Bh2#
- 2.Bg3#
- 2.Bf4#
- 2.Bf6#
- 2.Bc7#
- 2.Bg7#
- 2.Bb8#
- 2.Bh8#
- 1...f5
- 2.Bf4#
- 1...Rg7
- 2.Bh2#
- 2.Bg3#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bxg7#
- 2.Bb8#
- 1...Rh8
- 2.Bh2#
- 2.Bg3#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bg7#
- 2.Bb8#
- 2.Bxh8#
- 1...Sc5
- 2.Sxc5#
- 1...Sd6
- 2.Bxd6#
- 1...Sf6
- 2.Bxf6#
- 1...Sc7
- 2.Bh2#
- 2.Bg3#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bxc7#
- 2.Bg7#
- 2.Bh8#
- 1...Sg7
- 2.Bh2#
- 2.Bg3#
- 2.Bf4#
- 2.Bd6#
- 2.Bf6#
- 2.Bc7#
- 2.Bxg7#
- 2.Bb8#
- 1...f6
- 2.Bh2#
- 2.Bg3#
- 2.Bf4#
- 2.Bd6#
- 2.Bxf6#
- 2.Bc7#
- 2.Bb8#
- threat
- 1.Re1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- R(h);N_GUARD::QAB1(J),XP(g)
- S(i);N_GUARD::R1(A)
- S(i);N_GUARD::R1(A),XS(i)
- Tries
- Try
- B(B);CHECK,N_SPINR(D),XR(c)
- Vars
- P(g);P_SPINP(g)::B(B),XP(g)
- Refutation
- P(d);XB(B)
- Try
- B(F);
- Threat
- R(A)
- Vars
- S(b);N_GUARD::S(H),XS(b)
- S(i);N_GUARD::R1(A)
- S(i);N_GUARD::R1(A),XS(i)
- Refutation
- P(g);N_SPINR(c)
- Try
- B(F);
- Threat
- R(A)
- Vars
- S(b);N_GUARD::S(H),XS(b)
- S(i);N_GUARD::R1(A)
- S(i);N_GUARD::R1(A),XS(i)
- Refutation
- P(g);N_SPINR(c)
- Try
- B(F);N_SPINR(D)
- Threat
- R(A)
- Vars
- S(i);N_GUARD::R1(D),XS(i)
- S(i);N_GUARD::R1(D)
- Refutation
- S(b);
- Try
- B(F);
- Threat
- R(A)
- Vars
- S(i);N_GUARD,XB(F)::R1(A)
- S(b);N_GUARD::S(H),XS(b)
- S(i);N_GUARD::R1(A),XS(i)
- P(g);N_SPINR(c),OGATE::QAB1(J),XP(g)
- Refutation
- P(f);XP(G)
- Try
- B(F);
- Threat
- R(A)
- Vars
- S(i);OGATE,XB(F)::R1(A),XS(i)
- S(b);N_GUARD::S(H),XS(b)
- Refutation
- S(i);
- Try
- B(F);
- Threat
- R(A)
- Vars
- S(b);N_GUARD::S(H),XS(b)
- S(i);N_GUARD::R1(A)
- S(i);N_GUARD::R1(A),XS(i)
- Refutation
- P(g);N_SPINR(c)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(h);XB(F)::R(A)
- S(i);N_GUARD::R1(A)
- S(i);N_GUARD::R1(A),XS(i)
- P(g);::R(A)
- Refutation
- P(g);N_SPINR(c)
- Try
- B(F);
- Threat
- R(A)
- Vars
- S(b);N_GUARD::S(H),XS(b)
- S(i);N_GUARD::R1(A)
- S(i);N_GUARD::R1(A),XS(i)
- Refutation
- P(g);N_SPINR(c)
- Try
- B(F);
- Threat
- R(A)
- Vars
- S(b);N_GUARD::S(H),XS(b)
- S(i);N_GUARD::R1(A)
- S(i);N_GUARD::R1(A),XS(i)
- Refutation
- P(g);N_SPINR(c)
- Try
- Q(J);XS(i)
- Threat
- R1(A)
- Vars
- R(h);N_GUARD::QAB1(J),XP(g)
- P(g);::R1(A),XP(g)
- Refutation
- P(g);N_SPINR(c)
- Try
- Actual
- R(A);
- Threat
- DUALS(9)
- Vars
- P(g);N_SPINR(c)::R(A)+B(F)
- S(b);N_GUARD::S(H),XS(b)
- S(i);::R(A)+B(F),XS(i)
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).