MESON Chess Problem Database
Problem Display
PID: 237745 (b2R1K2/8/1p1B1p1Q/1r1B4/2Pk4/3Nn3/1PPNR2p/4nrbq w - - 0 1)
Ellerman, Arnoldo
Arbejder-Skak, 1952
#2
11 + 11
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rf2
- 2.Qxe3#
- 1...Rb3
- 2.Sxb3#
- 1...Ra5
- 2.Sb3#
- 1...Rc5
- 2.Sb3#
- 1...Bf2
- 2.Qxf6#
- 1...Sxd3
- 2.c3#
- 1...Sf3
- 2.Qf4#
- 1...Sg2
- 2.Re4#
- 1...Sf5
- 2.Qxf6#
- 1...f5
- 2.Be5#
- 2.Qg7#
- 2.Qf6#
- 2.Qh8#
- 1...Rf2
- Tries
- 1.Sf4?
- threat
- 2.Se6#
- 2.Qxf6#
- 2.c3#
- 1...Qxd5
- 2.c3#
- 1...Rxb2
- 2.Qxf6#
- 1...Rxd5
- 2.Se6#
- 2.c3#
- 1...Bxd5
- 2.Qxf6#
- 2.c3#
- 1...S1xc2
- 2.Qxf6#
- 1...S3xc2
- 2.Qxf6#
- 1...Sxc4
- 2.c3#
- 1...Sxd5
- 2.Se6#
- 1...Qe4
- 2.c3#
- 1...Rb3
- 2.Sxb3#
- 2.Se6#
- 2.Qxf6#
- 1...Sd3
- 2.Se6#
- 2.c3#
- 1...Sf3
- 2.Se6#
- 2.c3#
- 1...Sd1
- 2.Se6#
- 2.Qxf6#
- 1...Sg4
- 2.Se6#
- 2.c3#
- 1...f5
- 2.Se6#
- 2.Qg7#
- 2.Qf6#
- 2.Qh8#
- 2.c3#
- 1...Rxf4!
- threat
- 1.Be4?
- threat
- 2.Bc5#
- 2.Be5#
- 2.c3#
- 1...Qxe4
- 2.Bc5#
- 2.Be5#
- 1...Rxb2
- 2.Be5#
- 1...Bxe4
- 2.Bc5#
- 2.Be5#
- 1...S1xc2
- 2.Bc5#
- 2.Be5#
- 1...Sxd3
- 2.c3#
- 1...S3xc2
- 2.Bc5#
- 2.Be5#
- 1...Rd5
- 2.c3#
- 1...Rb3
- 2.Bc5#
- 2.Be5#
- 1...Rc5
- 2.Bxc5#
- 2.Be5#
- 2.c3#
- 1...Re5
- 2.Bc5#
- 2.Bxe5#
- 2.c3#
- 1...Bd5
- 2.c3#
- 1...Sd1
- 2.Bc5#
- 2.Be5#
- 1...Sd5!
- threat
- 1.Bc5+?
- 1...Rxc5
- 2.Sb3#
- 1...bxc5!
- 1...Rxc5
- 1.Qf4+?
- 1...Qe4
- 2.Qxe4#
- 1...Rxf4!
- 1...Qe4
- 1.Sf4?
- Keys
- 1.Bf3!
- threat
- 2.Bc5#
- 2.Be5#
- 1...Rxb2
- 2.Be5#
- 2.Qxf6#
- 1...Sxd3
- 2.c3#
- 1...Rd5
- 2.Qf4#
- 1...Rc5
- 2.Bxc5#
- 2.Be5#
- 1...Re5
- 2.Bc5#
- 2.Bxe5#
- 1...Bd5
- 2.Qxf6#
- 1...Sd5
- 2.Re4#
- threat
- 1.Bf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 8
- Sets
- R(b);S_CUTB(c)::QAB1(I),XS(f)
- R(h);N_GUARD::S(C),XR(h)
- R(h);N_GUARD::S(C)
- B(c);S_CUTR(b)::QAB(I),XP(j)
- S(a);SBLOCK,XS(E)::P(B)
- S(a);S_CUTQ(d),S_CUTR(b)::QAR2(I)
- S(f);OGATE::R1(D)
- S(f);S_CUTR(b)::QAB(I),XP(j)
- Tries
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- Q(d);XB(G)::P(B)
- R(h);XP(A)::QAB(I),XP(j)
- S(a);XP(B)::QAB(I),XP(j)
- S(f);XP(B)::QAB(I),XP(j)
- S(f);XP(F)::P(B)
- S(f);XB(G)::S(E)
- Q(d);::P(B)
- Refutation
- R(b);XS(E)
- Try
- B(G);
- Threat
- DUALS(3)
- Vars
- R(h);XP(A)::R(J)+B(H),DCHECK
- S(a);XS(E)::P(B)
- R(h);::P(B)
- B(k);::P(B)
- Refutation
- S(f);
- Try
- B(H);CHECK
- Vars
- R(h);XB(H)::S(C)
- Refutation
- P(i);XB(H)
- Try
- Q(I);CHECK
- Vars
- Q(d);N_GUARD,P_SPINQ(d)::QAR1(I),XQ(d)
- Refutation
- R(b);XQ(I)
- Try
- Actual
- B(G);
- Threat
- DUALS(2)
- Vars
- S(a);SBLOCK,XS(E)::P(B)
- R(h);S_CUTB(k)::QAR2(I)
- B(k);S_CUTR(h)::QAB(I),XP(j)
- S(f);OGATE::R1(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).