MESON Chess Problem Database
Problem Display
PID: 232766 (4Q3/3n2pb/8/K1ppppB1/4k1B1/2Pp1R1N/1p4rb/5Nq1 w - - 0 1)
Hoy, Paul
Freie Presse, 1968
#2
8 + 13
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qe3
- 2.Rxe3#
- 1...Qxf1
- 2.Re3#
- 1...Qh1
- 2.Re3#
- 1...Rd2
- 2.Sxd2#
- 1...Rf2
- 2.Re3#
- 1...Rg3
- 2.Sd2#
- 2.Rf4#
- 1...Rxg4
- 2.Sd2#
- 1...Bf4
- 2.Rxf4#
- 1...d4
- 2.Qa8#
- 1...Qe3
- Tries
- 1.Sf2+?
- 1...Rxf2
- 2.Re3#
- 1...Qxf2!
- 1...Rxf2
- 1.Bd2?
- threat
- 2.Sg5#
- 1...d4
- 2.Qa8#
- 1...Qe3
- 2.Rxe3#
- 1...Bf4
- 2.Rxf4#
- 1...g5
- 2.Sxg5#
- 1...Rxg4!
- threat
- 1.Be3?
- threat
- 2.Sg5#
- 1...Qxe3
- 2.Rxe3#
- 1...Rxg4
- 2.Sd2#
- 1...d4
- 2.Qa8#
- 1...Bf4
- 2.Rxf4#
- 1...g5
- 2.Sxg5#
- 1...d2!
- threat
- 1.Bf4?
- threat
- 2.Sg5#
- 1...Rxg4
- 2.Sd2#
- 1...Bxf4
- 2.Rxf4#
- 1...d4
- 2.Qa8#
- 1...g5
- 2.Sxg5#
- 1...fxg4!
- threat
- 1.Bf6?
- threat
- 2.Sg5#
- 1...Rxg4
- 2.Sd2#
- 1...d4
- 2.Qa8#
- 1...Qe3
- 2.Rxe3#
- 1...Bf4
- 2.Rxf4#
- 1...g5
- 2.Sxg5#
- 1...gxf6!
- threat
- 1.Bh6?
- threat
- 2.Sg5#
- 1...Rxg4
- 2.Sd2#
- 1...d4
- 2.Qa8#
- 1...Qe3
- 2.Rxe3#
- 1...Bf4
- 2.Rxf4#
- 1...g5
- 2.Sxg5#
- 1...gxh6!
- threat
- 1.Be7?
- threat
- 2.Sg5#
- 1...Rxg4
- 2.Sd2#
- 1...d4
- 2.Qa8#
- 1...Qe3
- 2.Rxe3#
- 1...g5
- 2.Sxg5#
- 1...Bf4!
- threat
- 1.Bd8?
- threat
- 2.Sg5#
- 1...Rxg4
- 2.Sd2#
- 1...Qe3
- 2.Rxe3#
- 1...Bf4
- 2.Rxf4#
- 1...g5
- 2.Sxg5#
- 1...d4!
- threat
- 1.Sf2+?
- Keys
- 1.Bh4!
- threat
- 2.Sg5#
- 1...Rxg4
- 2.Sd2#
- 1...d4
- 2.Qa8#
- 1...Qe3
- 2.Rxe3#
- 1...Bf4
- 2.Rxf4#
- 1...g5
- 2.Sxg5#
- threat
- 1.Bh4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- Q(a);N_GUARD::R1(C),XQ(a)
- Q(a);N_GUARD,XS(A)::R1(C)
- Q(a);N_GUARD::R1(C)
- R(c);N_GUARD::S(A),XR(c)
- R(c);S_CUTQ(a)::R1(C)
- R(c);N_GUARD,XB(E)::S(A)
- B(d);N_GUARD::R1(C),XB(d)
- P(h);OGATEB::QAB(H)
- Tries
- Try
- S(D);CHECK
- Vars
- R(c);XS(D)::R1(C)
- Refutation
- Q(a);XS(D)
- Try
- B(G);
- Threat
- S(D)
- Vars
- P(h);OGATEB::QAB(H)
- Q(a);N_GUARD::R1(C),XQ(a)
- B(d);N_GUARD::R1(C),XB(d)
- P(l);::S(D),XP(l)
- Refutation
- R(c);XB(E)
- Try
- B(G);
- Threat
- S(D)
- Vars
- Q(a);OGATE,XB(G)::R1(C),XQ(a)
- R(c);N_GUARD,XB(E)::S(A)
- P(h);OGATEB::QAB(H)
- B(d);N_GUARD::R1(C),XB(d)
- P(l);::S(D),XP(l)
- Refutation
- P(e);
- Try
- B(G);
- Threat
- S(D)
- Vars
- R(c);N_GUARD,XB(E)::S(A)
- B(d);OGATE,XB(G)::R1(C),XB(d)
- P(h);OGATEB::QAB(H)
- P(l);::S(D),XP(l)
- Refutation
- P(j);XB(E)
- Try
- B(G);
- Threat
- S(D)
- Vars
- R(c);N_GUARD,XB(E)::S(A)
- P(h);OGATEB::QAB(H)
- Q(a);N_GUARD::R1(C),XQ(a)
- B(d);N_GUARD::R1(C),XB(d)
- P(l);::S(D),XP(l)
- Refutation
- P(l);XB(G)
- Try
- B(G);
- Threat
- S(D)
- Vars
- R(c);N_GUARD,XB(E)::S(A)
- P(h);OGATEB::QAB(H)
- Q(a);N_GUARD::R1(C),XQ(a)
- B(d);N_GUARD::R1(C),XB(d)
- P(l);::S(D),XP(l)
- Refutation
- P(l);XB(G)
- Try
- B(G);N_PINP(i)
- Threat
- S(D)
- Vars
- R(c);N_GUARD,XB(E)::S(A)
- P(h);OGATEB::QAB(H)
- Q(a);N_GUARD::R1(C),XQ(a)
- P(l);::S(D),XP(l)
- Refutation
- B(d);
- Try
- B(G);
- Threat
- S(D)
- Vars
- R(c);N_GUARD,XB(E)::S(A)
- Q(a);N_GUARD::R1(C),XQ(a)
- B(d);N_GUARD::R1(C),XB(d)
- P(l);::S(D),XP(l)
- Refutation
- P(h);
- Try
- Actual
- B(G);
- Threat
- S(D)
- Vars
- R(c);N_GUARD,XB(E)::S(A)
- P(h);OGATEB::QAB(H)
- Q(a);N_GUARD::R1(C),XQ(a)
- B(d);N_GUARD::R1(C),XB(d)
- P(l);::S(D),XP(l)
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).