MESON Chess Problem Database
Problem Display
PID: 233862 (1bn5/N1rb1pp1/4Bp2/pp4RR/3k1B2/3p1P2/2p3nK/4Q3 w - - 0 1)
Ellerman, Arnoldo
Skakbladet, 1946
#2
8 + 13
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rc3
- 2.Qe4#
- 1...Rc4
- 2.Rd5#
- 1...Rc6
- 2.Sxb5#
- 1...Rxa7
- 2.Qa1#
- 1...Rb7
- 2.Qa1#
- 1...Bc6
- 2.Qa1#
- 1...Se3
- 2.Bxe3#
- 1...Sh4
- 2.Be3#
- 1...d2
- 2.Qxd2#
- 1...fxg5
- 2.Qe5#
- 1...f5
- 2.Qe5#
- 1...Rc3
- Tries
- 1.Sc6+?
- 1...Bxc6
- 2.Qa1#
- 1...Rxc6!
- 1...Bxc6
- 1.Be5+?
- 1...fxe5
- 2.Qxe5#
- 1...Kc5!
- 1...fxe5
- 1.Rg4?
- threat
- 2.Be3#
- 1...Rxa7
- 2.Qa1#
- 1...Sxe1
- 2.Bd2#
- 1...Sxf4
- 2.Rxf4#
- 1...d2
- 2.Qxd2#
- 1...f5
- 2.Qe5#
- 1...Rc3
- 2.Qe4#
- 1...Rc4
- 2.Rd5#
- 1...Rc5
- 2.Be5#
- 1...Rc6
- 2.Sxb5#
- 1...Rb7
- 2.Qa1#
- 1...Se3
- 2.Bxe3#
- 1...g5!
- threat
- 1.Rc5?
- threat
- 2.Rhd5#
- 2.Qc3#
- 2.Qa1#
- 2.Qe4#
- 1...Bxe6
- 2.Sxb5#
- 2.Qc3#
- 2.Qa1#
- 2.Qe4#
- 1...Sxe1
- 2.Rhd5#
- 1...Sxf4
- 2.Qf2#
- 2.Qg1#
- 2.Qe4#
- 1...fxe6
- 2.Qc3#
- 2.Qa1#
- 2.Qe4#
- 1...d2
- 2.Rhd5#
- 2.Qxd2#
- 2.Qe4#
- 1...f5
- 2.Qc3#
- 2.Qe5#
- 1...g5
- 2.Qc3#
- 1...c1Q
- 2.Rhd5#
- 2.Qe4#
- 1...c1S
- 2.Rhd5#
- 2.Qc3#
- 2.Qe4#
- 1...c1B
- 2.Rhd5#
- 2.Qc3#
- 2.Qe4#
- 1...c1R
- 2.Rhd5#
- 2.Qe4#
- 1...Bc6
- 2.Qc3#
- 2.Qa1#
- 1...Se3
- 2.Bxe3#
- 2.Qc3#
- 2.Qa1#
- 2.Qxe3#
- 1...Sb6
- 2.Qc3#
- 2.Qa1#
- 2.Qe4#
- 1...Sd6
- 2.Rhd5#
- 2.Qc3#
- 2.Qa1#
- 1...Se7
- 2.Qc3#
- 2.Qa1#
- 2.Qe4#
- 1...b4
- 2.Rhd5#
- 2.Qa1#
- 2.Qe4#
- 1...Rxc5!
- threat
- 1.Qb4+?
- 1...Rc4
- 2.Rd5#
- 1...axb4!
- 1...Rc4
- 1.Sc6+?
- Keys
- 1.Rh4!
- threat
- 2.Be3#
- 1...Rxa7
- 2.Qa1#
- 1...Sxe1
- 2.Bd2#
- 1...Sxf4
- 2.Rxf4#
- 1...fxg5
- 2.Qe5#
- 1...d2
- 2.Qxd2#
- 1...f5
- 2.Qe5#
- 1...Rc3
- 2.Qe4#
- 1...Rc4
- 2.Rd5#
- 1...Rc5
- 2.Be5#
- 1...Rc6
- 2.Sxb5#
- 1...Rb7
- 2.Qa1#
- 1...Se3
- 2.Bxe3#
- threat
- 1.Rh4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- R(h);P_PINB(D),SBLOCK::QAR1(A)
- R(h);P_PINB(D),SBLOCK::R1(E)
- R(h);P_PINB(D),S_CUTB(i)::S(H),XP(f)
- R(h);N_GUARD,P_PINB(D),XS(H)::QAB(A)
- R(h);N_GUARD,P_PINB(D)::QAB(A)
- B(i);S_CUTR(h)::QAB(A)
- S(b);N_GUARD::B(D),XS(b)
- S(b);N_GUARD::B(D)
- P(c);OGATEB::QAR2(A),XP(c)
- P(g);N_GUARD,XR(E)::QAB1(A)
- P(g);N_GUARD::QAB1(A)
- Tries
- Try
- S(H);CHECK
- Vars
- B(i);XS(H)::QAB(A)
- Refutation
- R(h);P_PINB(D),XS(H)
- Try
- B(D);CHECK
- Vars
- P(g);OGATE,XB(D)::QAB1(A),XP(g)
- Refutation
- K(d);S_FLIGHT
- Try
- R(E);
- Threat
- R(E)+B(D),DCHECK
- Vars
- R(h);N_GUARD,P_PINB(D),XS(H)::QAB(A)
- S(b);N_GUARD,XQ(A)::R(E)+B(D)
- S(b);OGATE,P_SPINS(b),XB(D)::R(E),XS(b)
- P(c);OGATEB::QAR2(A),XP(c)
- P(g);N_GUARD::QAB1(A)
- R(h);P_PINB(D),SBLOCK::QAR1(A)
- R(h);P_PINB(D),SBLOCK::R1(F)
- R(h);P_PINB(D),SBLOCK::R(E)+B(D),DCHECK
- R(h);P_PINB(D),S_CUTB(i)::S(H),XP(f)
- R(h);N_GUARD,P_PINB(D)::QAB(A)
- S(b);::R(E)+B(D),DCHECK,XS(b)
- Refutation
- P(k);
- Try
- R(E);
- Threat
- DUALS(4)
- Vars
- S(b);XQ(A)::R1(F)
- P(k);::QAB1(A)
- Refutation
- R(h);P_PINB(D),XR(E)
- Try
- Q(A);CHECK
- Vars
- R(h);P_PINB(D),P_SPINR(h)::R1(E)
- Refutation
- P(e);XQ(A)
- Try
- Actual
- R(F);
- Threat
- R(F)+B(D),DCHECK
- Vars
- R(h);N_GUARD,P_PINB(D),XS(H)::QAB(A)
- S(b);N_GUARD,XQ(A)::R(F)+B(D)
- S(b);OGATE,P_SPINS(b),XB(D)::R(F),XS(b)
- P(g);N_GUARD,XR(E)::QAB1(A)
- P(c);OGATEB::QAR2(A),XP(c)
- P(g);N_GUARD::QAB1(A)
- R(h);P_PINB(D),SBLOCK::QAR1(A)
- R(h);P_PINB(D),SBLOCK::R1(E)
- R(h);P_PINB(D),SBLOCK::R(F)+B(D),DCHECK
- R(h);P_PINB(D),S_CUTB(i)::S(H),XP(f)
- R(h);N_GUARD,P_PINB(D)::QAB(A)
- S(b);::R(F)+B(D),DCHECK,XS(b)
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).