MESON Chess Problem Database
Problem Display
PID: 233875 (4R3/K2b4/1N3p2/1p4bn/1BNk2r1/pQ1B4/2P2P1n/q7 w - - 0 1)
Ellerman, Arnoldo
Skakbladet, 1949
#2
9 + 10
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qc3
- 2.Qxc3#
- 1...Qb1
- 2.Qc3#
- 1...Qc1
- 2.Qc3#
- 1...Qd1
- 2.Qc3#
- 1...Qf1
- 2.Qc3#
- 1...Qg1
- 2.Qc3#
- 1...Qh1
- 2.Qc3#
- 1...Qa2
- 2.Qc3#
- 1...Rg1
- 2.Re4#
- 1...Rg2
- 2.Re4#
- 1...Rg3
- 2.Re4#
- 1...Re4
- 2.Rxe4#
- 1...Be3
- 2.fxe3#
- 1...Bf4
- 2.Re4#
- 1...Sf4
- 2.Re4#
- 1...bxc4
- 2.Qxc4#
- 1...Qc3
- Tries
- 1.Sb2?
- threat
- 2.Qd5#
- 2.Qc3#
- 2.c3#
- 1...Qxb2
- 2.Qd5#
- 1...Bxe8
- 2.Qd5#
- 2.Qc3#
- 1...Be6
- 2.Qc3#
- 1...Qc1
- 2.Qd5#
- 2.Qc3#
- 1...Qe1
- 2.Qd5#
- 1...Qh1
- 2.Qc3#
- 2.c3#
- 1...Qa2
- 2.Qc3#
- 2.c3#
- 1...Bd2
- 2.Qd5#
- 1...Bc6
- 2.Qc3#
- 2.c3#
- 1...Sf4
- 2.Re4#
- 2.Qc3#
- 2.c3#
- 1...axb2+!
- threat
- 1.Se3?
- threat
- 2.Qd5#
- 1...Qh1
- 2.Qc3#
- 1...Qa2
- 2.Qc3#
- 1...Bc6
- 2.Sf5#
- 1...Sf4
- 2.Re4#
- 1...Be6!
- threat
- 1.Se5?
- threat
- 2.Qd5#
- 1...Be6
- 2.Sc6#
- 1...Qh1
- 2.Qc3#
- 2.c3#
- 1...Qa2
- 2.Qc3#
- 2.c3#
- 1...Bc6
- 2.Sxc6#
- 1...Sf4!
- threat
- 1.Sd6?
- threat
- 2.Qd5#
- 1...Qh1
- 2.Qc3#
- 1...Qa2
- 2.Qc3#
- 1...Bc6
- 2.Sf5#
- 1...Sf4
- 2.Re4#
- 1...Be6!
- threat
- 1.Be4?
- threat
- 2.Qd3#
- 1...bxc4
- 2.Qxc4#
- 1...Qc3
- 2.Qxc3#
- 1...Qd1
- 2.Qc3#
- 2.c3#
- 1...Qf1
- 2.Qc3#
- 2.c3#
- 1...Sf4
- 2.Qe3#
- 1...Rg3!
- threat
- 1.Bf5?
- threat
- 2.Qd3#
- 1...bxc4
- 2.Qxc4#
- 1...Rg3
- 2.Re4#
- 1...Qc3
- 2.Qxc3#
- 1...Qd1
- 2.Qc3#
- 2.c3#
- 1...Qf1
- 2.Qc3#
- 2.c3#
- 1...Sf4
- 2.Re4#
- 2.Qe3#
- 1...Bxf5!
- threat
- 1.Bg6?
- threat
- 2.Qd3#
- 1...bxc4
- 2.Qxc4#
- 1...Rg3
- 2.Re4#
- 1...Qc3
- 2.Qxc3#
- 1...Qd1
- 2.Qc3#
- 2.c3#
- 1...Qf1
- 2.Qc3#
- 2.c3#
- 1...Sf4
- 2.Re4#
- 2.Qe3#
- 1...Bf5!
- threat
- 1.Bh7?
- threat
- 2.Qd3#
- 1...bxc4
- 2.Qxc4#
- 1...Rg3
- 2.Re4#
- 1...Qc3
- 2.Qxc3#
- 1...Qd1
- 2.Qc3#
- 2.c3#
- 1...Qf1
- 2.Qc3#
- 2.c3#
- 1...Sf4
- 2.Re4#
- 2.Qe3#
- 1...Bf5!
- threat
- 1.Re5?
- threat
- 2.Bc5#
- 2.Rd5#
- 1...bxc4
- 2.Rd5#
- 1...Qh1
- 2.Bc3#
- 2.Bc5#
- 2.Qc3#
- 1...Bc6
- 2.Bc5#
- 1...Be6
- 2.Bc5#
- 1...Sf4
- 2.Bc5#
- 2.Re4#
- 1...fxe5!
- threat
- 1.Qxa3?
- threat
- 2.Bc5#
- 2.Qxa1#
- 1...bxc4
- 2.Bc5#
- 1...Qb2
- 2.Bc5#
- 2.Qxb2#
- 1...Qc3
- 2.Bxc3#
- 2.Bc5#
- 2.Qxc3#
- 1...Qb1
- 2.Bc3#
- 2.Bc5#
- 2.Qc3#
- 1...Qc1
- 2.Bc3#
- 2.Bc5#
- 2.Qc3#
- 1...Qd1
- 2.Bc3#
- 2.Bc5#
- 2.Qb2#
- 2.Qc3#
- 1...Qe1
- 2.Bc5#
- 1...Qf1
- 2.Bc3#
- 2.Bc5#
- 2.Qb2#
- 2.Qc3#
- 1...Qg1
- 2.Bc3#
- 2.Bc5#
- 2.Qb2#
- 2.Qc3#
- 1...Qh1
- 2.Bc3#
- 2.Bc5#
- 2.Qb2#
- 2.Qc3#
- 1...Qa2
- 2.Bc3#
- 2.Bc5#
- 1...Rg1
- 2.Bc5#
- 2.Re4#
- 1...Bc1
- 2.Bc5#
- 1...Bd2
- 2.Bc5#
- 1...Qxa3+!
- threat
- 1.c3+?
- 1...Qxc3
- 2.Qxc3#
- 1...Kxd3!
- 1...Qxc3
- 1.Sb2?
- Keys
- 1.Sa5!
- threat
- 2.Qd5#
- 1...Be6
- 2.Sc6#
- 1...Qh1
- 2.Qc3#
- 1...Qa2
- 2.Qc3#
- 1...Bc6
- 2.Sxc6#
- 1...Sf4
- 2.Re4#
- threat
- 1.Sa5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 13
- Sets
- Q(a);N_GUARD::QAB1(C),XQ(a)
- Q(a);N_GUARD::QAB1(C)
- R(e);N_GUARD::R1(I)
- R(e);N_GUARD::R1(I),XR(e)
- B(g);OGATE::P(B),XB(g)
- B(g);S_CUTR(e)::R1(I)
- S(h);S_CUTR(e)::R1(I)
- P(f);OGATE,XS(F)::QAR1(C),XP(f)
- Tries
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- Q(a);XS(F)::QAR1(C)
- B(j);::QAB1(C)
- Q(a);::QAR1(C)
- B(g);::QAR1(C)
- Refutation
- P(c);CHECK,XS(F)
- Try
- S(F);
- Threat
- QAR1(C)
- Vars
- Q(a);N_GUARD::QAB1(C)
- B(j);N_GUARD::S(F)
- S(h);S_CUTR(e)::R1(I)
- Refutation
- B(j);
- Try
- S(F);
- Threat
- QAR1(C)
- Vars
- B(j);N_GUARD::S(F)
- B(j);N_GUARD::S(F),XB(j)
- Refutation
- S(h);
- Try
- S(F);
- Threat
- QAR1(C)
- Vars
- Q(a);N_GUARD::QAB1(C)
- B(j);N_GUARD::S(F)
- S(h);S_CUTR(e)::R1(I)
- Refutation
- B(j);
- Try
- B(D);
- Threat
- QAR1(C)
- Vars
- P(f);OGATE,XS(F)::QAR1(C),XP(f)
- Q(a);N_GUARD::QAB1(C),XQ(a)
- S(h);S_CUTB(g)::QAB1(C)
- Refutation
- R(e);
- Try
- B(D);
- Threat
- QAR1(C)
- Vars
- P(f);OGATE,XS(F)::QAR1(C),XP(f)
- R(e);N_GUARD::R1(I)
- Q(a);N_GUARD::QAB1(C),XQ(a)
- Refutation
- B(j);XB(D)
- Try
- B(D);
- Threat
- QAR1(C)
- Vars
- P(f);OGATE,XS(F)::QAR1(C),XP(f)
- R(e);N_GUARD::R1(I)
- Q(a);N_GUARD::QAB1(C),XQ(a)
- Refutation
- B(j);
- Try
- B(D);
- Threat
- QAR1(C)
- Vars
- P(f);OGATE,XS(F)::QAR1(C),XP(f)
- R(e);N_GUARD::R1(I)
- Q(a);N_GUARD::QAB1(C),XQ(a)
- Refutation
- B(j);
- Try
- R(I);
- Threat
- DUALS(2)
- Vars
- P(f);XS(F)::R1(I)
- B(j);::B(E)
- Refutation
- P(i);XR(I)
- Try
- Q(C);P_SPINQ(C),XP(c)
- Threat
- DUALS(2)
- Vars
- P(f);XS(F)::B(E)
- Q(a);N_PINQ(C)::B(E)
- B(g);::B(E)
- Refutation
- Q(a);CHECK,XQ(C)
- Try
- P(A);CHECK
- Vars
- Q(a);OGATE,XP(A)::QAB1(C),XQ(a)
- Refutation
- K(d);P-FLIGHT,XB(D)
- Try
- Actual
- S(F);
- Threat
- QAR1(C)
- Vars
- B(j);N_GUARD::S(F)
- Q(a);N_GUARD::QAB1(C)
- B(j);N_GUARD::S(F),XB(j)
- S(h);S_CUTR(e)::R1(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).