MESON Chess Problem Database
Problem Display
PID: 204318 (B1RQ4/B2p1N2/PK1p1R2/pp3r2/2bk1b2/2p3Nq/r1P2P2/8 w - - 0 1)
Ellerman, Arnoldo
Comm., Centurini/Guidelli MT, 1925
#2
11 + 11
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Sxf5#
- 1...Qg2
- 2.Sxf5#
- 1...Qh1
- 2.Sxf5#
- 1...Qh2
- 2.Sxf5#
- 1...Qh4
- 2.Sxf5#
- 1...Qh6
- 2.Sxf5#
- 1...Qh8
- 2.Sxf5#
- 1...Rc5
- 2.Rxf4#
- 1...Rd5
- 2.Rxf4#
- 1...Rg5
- 2.Rxf4#
- 1...Rh5
- 2.Rxf4#
- 1...Rxf6
- 2.Kc7#
- 1...Be2
- 2.Sxe2#
- 1...Bb3
- 2.Se2#
- 1...Bd5
- 2.Kxb5#
- 1...Be6
- 2.Se2#
- 1...Be5
- 2.Kc7#
- 1...d5
- 2.Kb7#
- 1...Qf1
- Tries
- 1.Kb7+?
- 1...Kd5
- 2.Kc7#
- 2.Kb8#
- 1...Rc5!
- 1...Kd5
- 1.Rxf5?
- threat
- 2.Kb7#
- 2.Kc7#
- 2.Rxf4#
- 1...Qxf5
- 2.Sxf5#
- 1...Qxg3
- 2.Kc7#
- 1...Bxf7
- 2.Kxb5#
- 2.Kb7#
- 2.Se2#
- 1...Bxg3
- 2.Kc7#
- 1...Qg2
- 2.Kc7#
- 1...Qg4
- 2.Kb7#
- 2.Kc7#
- 1...Qh1
- 2.Kc7#
- 1...Qh4
- 2.Kb7#
- 2.Kc7#
- 1...Qh6
- 2.Kb7#
- 2.Kc7#
- 1...Qh7
- 2.Kb7#
- 2.Kc7#
- 1...Bf1
- 2.Kb7#
- 2.Rxf4#
- 2.Rd5#
- 1...Be2
- 2.Kb7#
- 2.Sxe2#
- 2.Rxf4#
- 2.Rd5#
- 1...Bb3
- 2.Kxb5#
- 2.Kb7#
- 2.Se2#
- 2.Rxf4#
- 1...Bd3
- 2.Kb7#
- 2.Rd5#
- 1...Bd5
- 2.Kxb5#
- 2.Rxd5#
- 1...Be6
- 2.Kxb5#
- 2.Kb7#
- 2.Se2#
- 2.Rxf4#
- 1...Bc1
- 2.Kb7#
- 2.Kc7#
- 2.Qf6#
- 1...Bd2
- 2.Kb7#
- 2.Kc7#
- 2.Qf6#
- 1...Be3
- 2.Kb7#
- 2.Kc7#
- 2.Qf6#
- 1...Be5
- 2.Kc7#
- 1...Bg5
- 2.Kb7#
- 2.Kc7#
- 1...Bh6
- 2.Kb7#
- 2.Kc7#
- 2.Qf6#
- 1...d5
- 2.Kb7#
- 2.Rxf4#
- 1...Rxc2!
- threat
- 1.Rxd6+?
- 1...Rd5
- 2.Kb7#
- 2.Kc7#
- 1...Bd5
- 2.Kxb5#
- 1...Bxd6!
- 1...Rd5
- 1.Rxc4+?
- 1...bxc4
- 2.Se2#
- 1...Kxc4!
- 1...bxc4
- 1.Kb7+?
- Keys
- 1.Qh8!
- threat
- 2.Rxd6#
- 1...Qxh8
- 2.Sxf5#
- 1...Rxf6
- 2.Kc7#
- 1...Re5
- 2.Rxf4#
- 1...Rd5
- 2.Rxf4#
- 1...Bd5
- 2.Kxb5#
- 1...Be6
- 2.Se2#
- 1...Be5
- 2.Kc7#
- 1...d5
- 2.Kb7#
- threat
- 1.Qh8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 11
- Sets
- Q(c);N_GUARD::S(C),XR(i)
- R(i);OGATE::R(F),XB(f)
- R(i);N_GUARD,XR(F)::B(G)+K(E)
- B(d);N_GUARD::S(C),XB(d)
- B(d);N_GUARD::S(C)
- B(d);::B(G)+K(E),XP(h)
- B(f);S_CUTR(i)::B(G)+K(E)
- P(j);SBLOCK,S_CUTR(i)::B(G)+K(E)
- Tries
- Try
- K(E);CHECK,P-FLIGHT
- Refutation
- R(i);P_SPINR(i)
- Try
- R(F);XR(i)
- Threat
- DUALS(3)
- Vars
- Q(c);XR(F)::S(C),XQ(c)
- Q(c);XS(C)::B(G)+K(E)
- B(f);XS(C)::B(G)+K(E)
- Q(c);::B(G)+K(E)
- B(f);::B(G)+K(E)
- Refutation
- R(a);XP(A)
- Try
- R(F);CHECK,XP(j)
- Vars
- B(d);P_SPINB(d)::B(G)+K(E),XP(h)
- Refutation
- B(f);XR(F)
- Try
- R(J);CHECK,XB(d)
- Vars
- P(h);SBLOCK,XR(J)::S(C)
- Refutation
- K(e);P-FLIGHT,XR(J)
- Try
- Actual
- Q(K);
- Threat
- QAB(K)+R(F),DCHECK,XP(j)
- Vars
- Q(c);N_GUARD,XQ(K)::S(C),XR(i)
- R(i);N_GUARD,P_SPINR(i),XR(F)::B(G)+K(E)
- R(i);OGATE::R(F),XB(f)
- R(i);OGATE::QAB(K)+R(F),DCHECK,XB(f)
- B(d);::B(G)+K(E),XP(h)
- B(d);N_GUARD::S(C)
- B(f);S_CUTR(i)::B(G)+K(E)
- P(j);SBLOCK,S_CUTR(i)::B(G)+K(E)
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).