MESON Chess Problem Database
Problem Display
PID: 234157 (8/1K1p4/1p3Bp1/2pQ3p/2R2bkN/3n3p/3Nr1qP/3BnbR1 w - - 0 1)
Ellerman, Arnoldo
Shakhmaty (Riga), 1968
#2
9 + 13
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qxg1
- 2.Qg5#
- 2.Qxd7#
- 1...Qg3
- 2.Rxg3#
- 2.Qg5#
- 2.Qxd7#
- 1...Sc2
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...Qxg1
- Tries
- 1.Kxb6?
- threat
- 2.Qg5#
- 2.Qxd7#
- 1...g5
- 2.Qxg5#
- 1...Sf3
- 2.Qxf3#
- 1...d6
- 2.Qe6#
- 2.Qg5#
- 1...Se5!
- threat
- 1.Ka7?
- threat
- 2.Qg5#
- 2.Qxd7#
- 1...g5
- 2.Qxg5#
- 1...Sf3
- 2.Qxf3#
- 1...d6
- 2.Qe6#
- 2.Qg5#
- 1...Se5!
- threat
- 1.Kc8?
- threat
- 2.Qg5#
- 2.Qxd7#
- 1...g5
- 2.Qxg5#
- 1...Sf3
- 2.Qxf3#
- 1...d6
- 2.Qe6#
- 2.Qg5#
- 1...Se5!
- threat
- 1.Sxf1?
- threat
- 2.Se3#
- 1...Qxg1
- 2.Qg5#
- 2.Qxd7#
- 1...Sc2
- 2.Bxe2#
- 2.Qf3#
- 1...Sf3
- 2.Qxf3#
- 1...g5!
- threat
- 1.Se4?
- threat
- 2.Qxd7#
- 1...Bxh2
- 2.Qg5#
- 1...Bc1
- 2.Sf2#
- 1...Bd2
- 2.Sf2#
- 1...Be3
- 2.Sf2#
- 1...Bg3
- 2.Sf2#
- 2.Qg5#
- 1...Be5
- 2.Sf2#
- 1...Bg5
- 2.Sf2#
- 2.Qxg5#
- 1...Bd6
- 2.Sf2#
- 2.Qg5#
- 1...Bh6
- 2.Sf2#
- 1...Bc7
- 2.Sf2#
- 2.Qg5#
- 1...Bb8
- 2.Sf2#
- 2.Qg5#
- 1...Se5
- 2.Sf2#
- 1...d6
- 2.Qe6#
- 1...g5!
- threat
- 1.Sxg2?
- threat
- 2.Se3#
- 2.Qg5#
- 2.Qxd7#
- 1...Sxg2
- 2.Qg5#
- 2.Qxd7#
- 1...hxg2
- 2.Qxd7#
- 1...Se5
- 2.Se3#
- 2.Rxf4#
- 1...Sf3
- 2.Se3#
- 1...h4
- 2.Se3#
- 2.Qg5#
- 1...g5
- 2.Qxg5#
- 2.Qxd7#
- 1...d6
- 2.Se3#
- 2.Qe6#
- 2.Qg5#
- 1...Bxg2!
- threat
- 1.Bxe2+?
- 1...Sf3
- 2.Bxf3#
- 2.Qxf3#
- 2.Qg5#
- 2.Qxd7#
- 1...Bxe2!
- 1...Sf3
- 1.Rxg2+?
- 1...Sxg2
- 2.Qf3#
- 2.Qg5#
- 2.Qxd7#
- 1...hxg2
- 2.Qxd7#
- 1...Bxg2!
- 1...Sxg2
- 1.Re4?
- threat
- 2.Qg5#
- 2.Qxd7#
- 1...g5
- 2.Qxg5#
- 1...Sf3
- 2.Qxd7#
- 1...d6
- 2.Qe6#
- 2.Qg5#
- 1...Se5!
- threat
- 1.Kxb6?
- Keys
- 1.Sdf3!
- threat
- 2.Qg5#
- 1...Sxf3
- 2.Qxf3#
- 1...Se5
- 2.Sxe5#
- 1...Re4
- 2.Se5#
- 1...Re5
- 2.Sxe5#
- 1...g5
- 2.Qf5#
- 2.Qxg5#
- threat
- 1.Sdf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- S(a);N_GUARD::QAB1(G)
- S(a);N_GUARD,N_PINQ(G),N_SPINR(c)::QAB1(G),XS(a)
- Tries
- Try
- K(I);N_SPINQ(G),P-FLIGHT,XP(k)
- Threat
- DUALS(2)
- Vars
- P(l);::QAR1(G),XP(l)
- S(a);N_GUARD,N_SPINR(c)::QAB1(G),XS(a)
- Refutation
- S(e);
- Try
- K(I);N_SPINQ(G),P-FLIGHT
- Threat
- DUALS(2)
- Vars
- P(l);::QAR1(G),XP(l)
- S(a);N_GUARD,N_SPINR(c)::QAB1(G),XS(a)
- Refutation
- S(e);
- Try
- K(I);N_SPINQ(G),S_FLIGHT
- Threat
- DUALS(2)
- Vars
- P(l);::QAR1(G),XP(l)
- S(a);N_GUARD,N_SPINR(c)::QAB1(G),XS(a)
- Refutation
- S(e);
- Try
- S(C);XB(b)
- Threat
- S(C)
- Vars
- S(a);N_GUARD,N_PINQ(G),N_SPINR(c)::QAB1(G),XS(a)
- Refutation
- P(l);
- Try
- S(C);N_PINB(g),N_SPINQ(G)
- Threat
- QAB(G),XP(m)
- Vars
- B(g);N_GUARD,XP(D)::QAR1(G)
- B(g);::R(E)+S(C),DCHECK
- S(e);N_GUARD::S(C)
- P(m);N_GUARD::QAB(G)
- Refutation
- P(l);
- Try
- S(F);N_SPINQ(G),XQ(d)
- Threat
- DUALS(3)
- Vars
- P(f);P_SPINP(f),XS(F)::QAB(G),XP(m)
- S(a);N_SPINR(c)::R(B)+S(F),DCHECK
- Refutation
- B(b);N_SPINB(g),P_PINQ(G),P_SPINB(b),XS(F)
- Try
- B(A);CHECK,XR(c)
- Refutation
- B(b);XB(A)
- Try
- R(B);CHECK,N_SPINQ(G),XQ(d)
- Vars
- P(f);XR(B)::QAB(G),XP(m)
- Refutation
- B(b);P_PINQ(G),XR(B)
- Try
- R(E);N_SPINQ(G)
- Threat
- DUALS(2)
- Vars
- P(l);::QAR1(G),XP(l)
- S(a);N_SPINR(c)::QAB(G),XP(m)
- Refutation
- S(e);
- Try
- Actual
- S(C);N_PINR(c),N_SPINQ(G)
- Threat
- QAR1(G)
- Vars
- S(a);OGATE,XS(C)::QAB1(G),XS(a)
- S(e);N_GUARD::S(C),XS(e)
- R(c);N_SPINB(g)::B(A)+S(C),DCHECK
- R(c);::B(A)+S(C),DCHECK,XR(c)
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).