MESON Chess Problem Database
Problem Display
PID: 2991 (nr6/p2R4/Pk1p4/4N3/PBB2Pp1/2P3P1/3PP1K1/rQ6 w - - 0 1)
Bernard, Henry D'Oyly
Source?, 1916
#2
13 + 7
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Rxb1
- 2.a5#
- 1...Ra2
- 2.Qg1#
- 1...Ra3
- 2.Qg1#
- 1...Rxa4
- 2.Qg1#
- 1...Rb7
- 2.Rxb7#
- 1...Rc8
- 2.Rb7#
- 1...Rd8
- 2.Rb7#
- 1...Re8
- 2.Rb7#
- 1...Rf8
- 2.Rb7#
- 1...Rg8
- 2.Rb7#
- 1...Rh8
- 2.Rb7#
- 1...Sc7
- 2.Rxd6#
- 1...dxe5
- 2.Qg6#
- 1...d5
- 2.Qg6#
- 1...Rxb1
- Tries
- 1.Kh2?
- 1...Rxb1
- 2.a5#
- 1...Rxa4
- 2.Qg1#
- 1...dxe5
- 2.Qg6#
- 1...Ra2
- 2.Qg1#
- 1...Ra3
- 2.Qg1#
- 1...Rb7
- 2.Rxb7#
- 1...Rc8
- 2.Rb7#
- 1...Rd8
- 2.Rb7#
- 1...Re8
- 2.Rb7#
- 1...Rf8
- 2.Rb7#
- 1...Rg8
- 2.Rb7#
- 1...Sc7
- 2.Rxd6#
- 1...d5
- 2.Qg6#
- 1...Rh8+!
- 1...Rxb1
- 1.Ba5+?
- 1...Kc5
- 2.d4#
- 1...Kxa5!
- 1...Kc5
- 1.Bc5+?
- 1...Kxc5
- 2.d4#
- 1...Ka5!
- 1...Kxc5
- 1.Bb5?
- threat
- 2.Sc4#
- 1...dxe5
- 2.Qg6#
- 1...Rc8
- 2.Rb7#
- 1...d5
- 2.Qg6#
- 1...Rxa4!
- threat
- 1.Re7?
- 1...Rxb1
- 2.a5#
- 1...Rxa4
- 2.Qg1#
- 1...dxe5
- 2.Qg6#
- 1...Ra2
- 2.Qg1#
- 1...Ra3
- 2.Qg1#
- 1...Rb7
- 2.Rxb7#
- 1...Rc8
- 2.Rb7#
- 1...Rd8
- 2.Rb7#
- 1...Re8
- 2.Rb7#
- 1...Rf8
- 2.Rb7#
- 1...Rg8
- 2.Rb7#
- 1...Rh8
- 2.Rb7#
- 1...d5
- 2.Qg6#
- 1...Sc7!
- 1...Rxb1
- 1.Rf7?
- 1...Rxb1
- 2.a5#
- 1...Rxa4
- 2.Qg1#
- 1...dxe5
- 2.Qg6#
- 1...Ra2
- 2.Qg1#
- 1...Ra3
- 2.Qg1#
- 1...Rb7
- 2.Rxb7#
- 1...Rc8
- 2.Rb7#
- 1...Rd8
- 2.Rb7#
- 1...Re8
- 2.Rb7#
- 1...Rf8
- 2.Rb7#
- 1...Rg8
- 2.Rb7#
- 1...Rh8
- 2.Rb7#
- 1...d5
- 2.Qg6#
- 1...Sc7!
- 1...Rxb1
- 1.Rg7?
- 1...Rxb1
- 2.a5#
- 1...Rxa4
- 2.Qg1#
- 1...dxe5
- 2.Qg6#
- 1...Ra2
- 2.Qg1#
- 1...Ra3
- 2.Qg1#
- 1...Rb7
- 2.Rxb7#
- 1...Rc8
- 2.Rb7#
- 1...Rd8
- 2.Rb7#
- 1...Re8
- 2.Rb7#
- 1...Rf8
- 2.Rb7#
- 1...Rg8
- 2.Rb7#
- 1...Rh8
- 2.Rb7#
- 1...d5
- 2.Qg6#
- 1...Sc7!
- 1...Rxb1
- 1.Rh7?
- 1...Rxb1
- 2.a5#
- 1...Rxa4
- 2.Qg1#
- 1...dxe5
- 2.Qg6#
- 1...Ra2
- 2.Qg1#
- 1...Ra3
- 2.Qg1#
- 1...Rb7
- 2.Rxb7#
- 1...Rc8
- 2.Rb7#
- 1...Rd8
- 2.Rb7#
- 1...Re8
- 2.Rb7#
- 1...Rf8
- 2.Rb7#
- 1...Rg8
- 2.Rb7#
- 1...Rh8
- 2.Rb7#
- 1...d5
- 2.Qg6#
- 1...Sc7!
- 1...Rxb1
- 1.Qd3?
- threat
- 2.Qe3#
- 2.Qd4#
- 2.Qxd6#
- 1...dxe5
- 2.Qg6#
- 2.Qd6#
- 1...Rc8
- 2.Rb7#
- 1...d5
- 2.Qg6#
- 2.Qd4#
- 1...Rg1+!
- threat
- 1.Qe4?
- threat
- 2.Qc6#
- 2.Qe3#
- 2.Qd4#
- 1...dxe5
- 2.Qg6#
- 1...Rc8
- 2.Rb7#
- 2.Qb7#
- 1...d5
- 2.Qg6#
- 2.Qd4#
- 1...Rg1+!
- threat
- 1.Qg6?
- threat
- 2.Qxd6#
- 1...Rc8
- 2.Rb7#
- 1...Rg1+!
- threat
- 1.Qh7?
- threat
- 2.Rxd6#
- 1...dxe5
- 2.Rd6#
- 2.Qg6#
- 2.Qh6#
- 1...Rc8
- 2.Rb7#
- 1...Rd8
- 2.Rb7#
- 1...d5
- 2.Rd6#
- 2.Qg6#
- 2.Qh6#
- 1...Rg1+!
- threat
- 1.Qxa1?
- threat
- 2.Qg1#
- 2.a5#
- 1...Rc8
- 2.Rb7#
- 2.a5#
- 1...d5
- 2.a5#
- 1...dxe5!
- threat
- 1.Kh2?
- Keys
- 1.Qh1!
- 1...Rg1+
- 2.Qxg1#
- 1...Rxh1
- 2.a5#
- 1...Rxa4
- 2.Qg1#
- 1...dxe5
- 2.Qh6#
- 1...d5
- 2.Qh6#
- 1...Rb1
- 2.a5#
- 1...Rc1
- 2.a5#
- 1...Rd1
- 2.a5#
- 1...Re1
- 2.a5#
- 1...Rf1
- 2.a5#
- 1...Ra2
- 2.Qg1#
- 1...Ra3
- 2.Qg1#
- 1...Rb7
- 2.Rxb7#
- 1...Rc8
- 2.Rb7#
- 1...Rd8
- 2.Rb7#
- 1...Re8
- 2.Rb7#
- 1...Rf8
- 2.Rb7#
- 1...Rg8
- 2.Rb7#
- 1...Rh8
- 2.Rb7#
- 1...Sc7
- 2.Rxd6#
- 1...Rg1+
- 1.Qh1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD,XQ(A)::P(G)
- R(a);N_GUARD::QAB(A)
- R(a);N_GUARD,XP(G)::QAB(A)
- R(g);N_GUARD::R1(M),XR(g)
- R(g);N_GUARD::R1(M)
- S(f);SBLOCK::R(M),XP(d)
- P(d);OGATEB,XS(K)::QAR(A)
- P(d);OGATEB::QAR(A)
- Tries
- Try
- K(D);P-FLIGHT
- Vars
- R(a);N_GUARD,XQ(A)::P(G)
- R(a);N_GUARD,XP(G)::QAB(A)
- P(d);OGATEB,XS(K)::QAR(A)
- R(a);N_GUARD::QAB(A)
- R(g);N_GUARD::R1(M),XR(g)
- R(g);N_GUARD::R1(M)
- S(f);SBLOCK::R(M),XP(d)
- P(d);OGATEB::QAR(A)
- Refutation
- R(g);CHECK
- Try
- B(H);CHECK
- Vars
- K(c);S_FLIGHT::P(B)
- Refutation
- K(c);S_FLIGHT,XB(H)
- Try
- B(H);CHECK
- Vars
- K(c);S_FLIGHT,XB(H)::P(B)
- Refutation
- K(c);S_FLIGHT
- Try
- B(I);
- Threat
- S(K)
- Vars
- P(d);OGATEB,XS(K)::QAR(A)
- R(g);N_GUARD::R1(M)
- P(d);OGATEB::QAR(A)
- Refutation
- R(a);XP(G)
- Try
- R(M);
- Vars
- R(a);N_GUARD,XQ(A)::P(G)
- R(a);N_GUARD,XP(G)::QAB(A)
- P(d);OGATEB,XS(K)::QAR(A)
- R(a);N_GUARD::QAB(A)
- R(g);N_GUARD::R1(M),XR(g)
- R(g);N_GUARD::R1(M)
- P(d);OGATEB::QAR(A)
- Refutation
- S(f);
- Try
- R(M);
- Vars
- R(a);N_GUARD,XQ(A)::P(G)
- R(a);N_GUARD,XP(G)::QAB(A)
- P(d);OGATEB,XS(K)::QAR(A)
- R(a);N_GUARD::QAB(A)
- R(g);N_GUARD::R1(M),XR(g)
- R(g);N_GUARD::R1(M)
- P(d);OGATEB::QAR(A)
- Refutation
- S(f);
- Try
- R(M);
- Vars
- R(a);N_GUARD,XQ(A)::P(G)
- R(a);N_GUARD,XP(G)::QAB(A)
- P(d);OGATEB,XS(K)::QAR(A)
- R(a);N_GUARD::QAB(A)
- R(g);N_GUARD::R1(M),XR(g)
- R(g);N_GUARD::R1(M)
- P(d);OGATEB::QAR(A)
- Refutation
- S(f);
- Try
- R(M);
- Vars
- R(a);N_GUARD,XQ(A)::P(G)
- R(a);N_GUARD,XP(G)::QAB(A)
- P(d);OGATEB,XS(K)::QAR(A)
- R(a);N_GUARD::QAB(A)
- R(g);N_GUARD::R1(M),XR(g)
- R(g);N_GUARD::R1(M)
- P(d);OGATEB::QAR(A)
- Refutation
- S(f);
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- R(g);N_GUARD::R1(M)
- Refutation
- R(a);CHECK
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- P(d);OGATEB,XS(K)::QAR(A)
- Refutation
- R(a);CHECK
- Try
- Q(A);P_PINP(d)
- Threat
- QAR2(A),XP(d)
- Vars
- R(g);N_GUARD::R1(M)
- Refutation
- R(a);CHECK
- Try
- Q(A);
- Threat
- R(M),XP(d)
- Vars
- R(g);N_GUARD::R1(M)
- Refutation
- R(a);CHECK
- Try
- Q(A);XR(a)
- Threat
- DUALS(2)
- Vars
- P(d);::P(G)
- Refutation
- P(d);XS(K)
- Try
- Actual
- Q(A);
- Vars
- R(a);CHECK,N_GUARD::QAB(A),XR(a)
- R(a);N_GUARD,XQ(A)::P(G)
- R(a);N_GUARD,XP(G)::QAB(A)
- P(d);OGATEB,XS(K)::QAR(A)
- P(d);OGATEB::QAR(A)
- R(a);N_GUARD::P(G)
- R(a);N_GUARD::QAB(A)
- R(g);N_GUARD::R1(M),XR(g)
- R(g);N_GUARD::R1(M)
- S(f);SBLOCK::R(M),XP(d)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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