MESON Chess Problem Database
Problem Display
PID: 232776 (4Bb1B/rQ6/1rppp1Np/Rq3k1K/4N1pp/8/n7/4R3 w - - 0 1)
Hoy, Paul
Freie Presse, 1974
#2
8 + 12
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rxa5
- 2.Qf7#
- 1...Ra6
- 2.Qf7#
- 1...Ra8
- 2.Qf7#
- 1...h3
- 2.Sg3#
- 1...e5
- 2.Bd7#
- 1...Rxa5
- Tries
- 1.Sc3?
- threat
- 2.Rf1#
- 1...Rxa5
- 2.Qf7#
- 1...e5
- 2.Bd7#
- 1...c5
- 2.Qe4#
- 1...d5
- 2.Re5#
- 1...Sxc3!
- threat
- 1.Sg5?
- threat
- 2.Rf1#
- 1...Rxa5
- 2.Qf7#
- 1...c5
- 2.Qe4#
- 1...d5
- 2.Re5#
- 1...e5
- 2.Bd7#
- 1...hxg5!
- threat
- 1.Sf6?
- threat
- 2.Rf1#
- 1...e5
- 2.Bd7#
- 1...c5
- 2.Qe4#
- 1...d5
- 2.Re5#
- 1...Rxa5!
- threat
- 1.Qe7?
- threat
- 2.Sxd6#
- 2.Qf6#
- 1...Rxe7
- 2.Sxd6#
- 1...Rd7
- 2.Qf6#
- 1...Bg7
- 2.Sxd6#
- 1...c5
- 2.Qf6#
- 1...d5
- 2.Sd6#
- 2.Qf6#
- 1...Bxe7!
- threat
- 1.Sc3?
- Keys
- 1.Sd2!
- threat
- 2.Rf1#
- 1...Rxa5
- 2.Qf7#
- 1...e5
- 2.Bd7#
- 1...c5
- 2.Qe4#
- 1...d5
- 2.Re5#
- threat
- 1.Sd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 3
- Sets
- R(k);N_GUARD,N_SPINQ(d),XR(C)::QAR2(F)
- R(k);N_GUARD::QAR2(F)
- P(c);N_GUARD::S(B)
- P(i);N_SPINQ(d),OGATEB::B(G)
- Tries
- Try
- S(B);
- Threat
- R(A)
- Vars
- R(k);N_GUARD,N_SPINQ(d),XR(C)::QAR2(F)
- P(i);N_SPINQ(d),OGATEB::B(G)
- P(g);N_SPINQ(d),OGATE::QAB1(F)
- P(h);N_GUARD,N_SPINQ(d),S_CUTQ(d)::R1(A)
- Refutation
- S(a);XS(B)
- Try
- S(B);
- Threat
- R(A)
- Vars
- R(k);N_GUARD,N_SPINQ(d),XR(C)::QAR2(F)
- P(g);N_SPINQ(d),OGATE::QAB1(F)
- P(h);N_GUARD,N_SPINQ(d),S_CUTQ(d)::R1(A)
- P(i);N_SPINQ(d),OGATEB::B(G)
- Refutation
- P(j);XS(B)
- Try
- S(B);
- Threat
- R(A)
- Vars
- P(i);N_SPINQ(d),OGATEB::B(G)
- P(g);N_SPINQ(d),OGATE::QAB1(F)
- P(h);N_GUARD,N_SPINQ(d),S_CUTQ(d)::R1(A)
- Refutation
- R(k);N_SPINQ(d),XR(C)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- R(k);XQ(F)::S(B),XP(h)
- R(k);::QAR1(F)
- B(l);::S(B),XP(h)
- P(g);N_SPINQ(d)::QAR1(F)
- Refutation
- B(l);XQ(F)
- Try
- Actual
- S(B);
- Threat
- R(A)
- Vars
- R(k);N_GUARD,N_SPINQ(d),XR(C)::QAR2(F)
- P(i);N_SPINQ(d),OGATEB::B(G)
- P(g);N_SPINQ(d),OGATE::QAB1(F)
- P(h);N_GUARD,N_SPINQ(d),S_CUTQ(d)::R1(A)
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).