MESON Chess Problem Database
Problem Display
PID: 83689 (K3R1b1/p3nrp1/5p1n/2Q5/r4k2/2BpN2P/1p2P2P/4q1RB w - - 0 1)
Ellerman, Arnoldo
Die Schwalbe, 1969
#2
10 + 12
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qd2
- 2.Rf1#
- 1...Qxc3
- 2.Rf1#
- 1...Qg3
- 2.hxg3#
- 1...Qf1
- 2.Rxf1#
- 1...Ra1
- 2.Qd4#
- 1...Ra2
- 2.Qd4#
- 1...Ra3
- 2.Qd4#
- 1...Rd4
- 2.Qxd4#
- 1...Re4
- 2.Sg2#
- 1...Ra5
- 2.Qd4#
- 1...Ra6
- 2.Qd4#
- 1...Sg4
- 2.Rxg4#
- 1...Shf5
- 2.Rg4#
- 1...Sd5
- 2.Qd6#
- 1...Sef5
- 2.Sd5#
- 1...Sc6
- 2.Sg2#
- 1...Sg6
- 2.Sg2#
- 1...Sc8
- 2.Sg2#
- 1...f5
- 2.Be5#
- 2.Qe5#
- 1...Qd2
- Tries
- 1.Bxe1?
- threat
- 2.Bg3#
- 2.Rf1#
- 1...dxe2
- 2.Bg3#
- 1...Rd4
- 2.Qxd4#
- 1...Sg4
- 2.Bg3#
- 2.Rxg4#
- 1...Shf5
- 2.Rg4#
- 1...Sd5
- 2.Qd6#
- 1...Sef5
- 2.Sd5#
- 1...f5!
- threat
- 1.Bd2?
- threat
- 2.Qd6#
- 2.Qc7#
- 1...Qxd2
- 2.Rf1#
- 1...Qg3
- 2.hxg3#
- 1...Qc1
- 2.Qd6#
- 1...Rc4
- 2.Qd6#
- 1...Rd4
- 2.Qxd4#
- 1...Re4
- 2.Sg2#
- 1...Ra5
- 2.Qd4#
- 1...Ra6
- 2.Qd4#
- 1...Sg4
- 2.Rxg4#
- 1...Shf5
- 2.Rg4#
- 1...Sd5
- 2.Qd6#
- 1...Sef5
- 2.Sg2#
- 2.Sd5#
- 1...Sc6
- 2.Sg2#
- 1...Sg6
- 2.Sg2#
- 1...Sc8
- 2.Sg2#
- 1...Qxg1!
- threat
- 1.Bxf6?
- threat
- 2.Be5#
- 2.Bg5#
- 2.Qe5#
- 2.Qg5#
- 1...Qxg1
- 2.Qe5#
- 1...Rxf6
- 2.Qg5#
- 1...Rd4
- 2.Bg5#
- 2.Qxd4#
- 2.Qe5#
- 2.Qg5#
- 1...Qc3
- 2.Bg5#
- 2.Rf1#
- 2.Qg5#
- 1...Qg3
- 2.Qe5#
- 2.hxg3#
- 1...Qh4
- 2.Be5#
- 2.Qe5#
- 1...Qa5
- 2.Be5#
- 2.Bg5#
- 2.Rf1#
- 1...Re4
- 2.Sg2#
- 2.Bg5#
- 2.Qg5#
- 1...Ra5
- 2.Be5#
- 2.Bg5#
- 2.Qd4#
- 1...Sg4
- 2.Bg5#
- 2.Rxg4#
- 2.Qg5#
- 1...Shf5
- 2.Be5#
- 2.Bg5#
- 2.Rg4#
- 2.Qe5#
- 1...Sd5
- 2.Be5#
- 2.Bg5#
- 2.Qd6#
- 1...Sef5
- 2.Sg2#
- 2.Sd5#
- 2.Be5#
- 2.Bg5#
- 2.Qe5#
- 1...Sc6
- 2.Sg2#
- 2.Bg5#
- 2.Qg5#
- 1...Sg6
- 2.Sg2#
- 2.Bg5#
- 2.Qg5#
- 1...g5
- 2.Be5#
- 2.Bxg5#
- 2.Qe5#
- 2.Qxg5#
- 1...gxf6!
- threat
- 1.Rf1+?
- 1...Qf2
- 2.Rxf2#
- 1...Qxf1!
- 1...Qf2
- 1.Qf5+?
- 1...Kxe3
- 2.Qf3#
- 1...Sexf5
- 2.Sd5#
- 1...Shxf5!
- 1...Kxe3
- 1.Bxe1?
- Keys
- 1.Ba5!
- threat
- 2.Bc7#
- 1...Qxa5
- 2.Rf1#
- 1...Rxa5
- 2.Qd4#
- 1...Rd4
- 2.Qxd4#
- 1...Qc3
- 2.Rf1#
- 1...Re4
- 2.Sg2#
- 1...Sg4
- 2.Rxg4#
- 1...Shf5
- 2.Rg4#
- 1...Sd5
- 2.Qd6#
- 1...Sef5
- 2.Sd5#
- 1...Sc6
- 2.Sg2#
- 1...Sg6
- 2.Sg2#
- 1...Sc8
- 2.Sg2#
- threat
- 1.Ba5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 7
- Sets
- Q(a);N_GUARD::R(A)
- Q(a);N_GUARD,XB(E)::R(A)
- Q(a);OGATE::P(D),XQ(a)
- Q(a);N_GUARD::R(A),XQ(a)
- R(d);N_GUARD::QAR2(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- R(d);SBLOCK::S(F)
- S(g);N_GUARD::R1(A),XS(g)
- S(g);N_GUARD::R1(A)
- S(i);::QAB(H)
- S(i);N_GUARD,SBLOCK::S(F)
- S(i);::S(F)
- Tries
- Try
- B(E);XQ(a)
- Threat
- DUALS(2)
- Vars
- P(c);XP(C)::B(E)
- R(d);N_GUARD::QAR2(H),XR(d)
- S(g);N_GUARD::R1(A)
- S(i);::QAB(H)
- S(i);N_GUARD,SBLOCK::S(F)
- Refutation
- P(f);
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,XB(E)::R(A)
- Q(a);OGATE::P(D),XQ(a)
- Q(a);::QAB(H)
- R(d);::QAB(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- R(d);SBLOCK::B(E)+S(F),DCHECK
- R(d);N_GUARD::QAR2(H)
- S(g);N_GUARD::R1(A),XS(g)
- S(g);N_GUARD::R1(A)
- S(i);::QAB(H)
- S(i);::B(E)+S(F),DCHECK
- Refutation
- Q(a);XR(A)
- Try
- B(E);XP(f)
- Threat
- DUALS(4)
- Vars
- Q(a);XR(A)::QAB1(H)
- R(j);XB(E)::QAB1(H)
- Refutation
- P(k);XB(E)
- Try
- R(A);CHECK
- Vars
- Q(a);N_GUARD,P_SPINQ(a)::R(A),XQ(a)
- Refutation
- Q(a);XR(A)
- Try
- Q(H);CHECK
- Vars
- K(e);OGATE,P_SPINS(i),S_FLIGHT,XS(F)::QAR1(H)
- S(i);SBLOCK,XQ(H)::S(F)
- Refutation
- S(g);XQ(H)
- Try
- Actual
- B(E);
- Threat
- B(E)
- Vars
- Q(a);N_GUARD,XB(E)::R(A)
- R(d);N_GUARD,XB(E)::QAR2(H)
- R(d);N_GUARD::QAR2(H),XR(d)
- Q(a);N_GUARD::R(A)
- R(d);SBLOCK::S(F)
- S(g);N_GUARD::R1(A),XS(g)
- S(g);N_GUARD::R1(A)
- S(i);::QAB(H)
- S(i);N_GUARD,SBLOCK::S(F)
- S(i);::S(F)
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).