MESON Chess Problem Database
Problem Display
PID: 2861 (1N5K/4ppQ1/1PB2n2/b1k2Np1/1R4P1/1Pn5/2P5/2B5 w - - 0 1)
Reira, Pedro
Tijdschrift vd NSB, 1895
#2
11 + 7
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Kxb4
- 2.Sa6#
- 1...Bxb4
- 2.Be3#
- 1...Bxb6
- 2.Rc4#
- 1...Sb1
- 2.Rb5#
- 1...Sd1
- 2.Rb5#
- 1...Sa2
- 2.Rb5#
- 1...Se2
- 2.Rb5#
- 1...Sa4
- 2.Rb5#
- 1...Sce4
- 2.Rb5#
- 1...Sb5
- 2.Rxb5#
- 1...Scd5
- 2.Rb5#
- 1...Sfe4
- 2.Qd4#
- 1...Sxg4
- 2.Qxc3#
- 2.Qd4#
- 1...Sfd5
- 2.Qd4#
- 1...Sh5
- 2.Qxc3#
- 2.Qd4#
- 1...Sd7
- 2.Qxc3#
- 2.Qd4#
- 1...Sh7
- 2.Qxc3#
- 2.Qd4#
- 1...Se8
- 2.Qxc3#
- 2.Qd4#
- 1...Sg8
- 2.Qxc3#
- 2.Qd4#
- 1...e5
- 2.Qf8#
- 1...e6
- 2.Qf8#
- 1...Kxb4
- Tries
- 1.Bb2?
- 1...Kxb4
- 2.Sa6#
- 1...Bxb6
- 2.Rc4#
- 1...Sxg4
- 2.Qxc3#
- 2.Qd4#
- 1...Sb5
- 2.Rxb5#
- 1...Sb1
- 2.Rb5#
- 1...Sd1
- 2.Rb5#
- 1...Sa2
- 2.Rb5#
- 1...Se2
- 2.Rb5#
- 1...Sa4
- 2.Rb5#
- 1...Sce4
- 2.Rb5#
- 1...Scd5
- 2.Rb5#
- 1...Sfe4
- 2.Qd4#
- 1...Sfd5
- 2.Qd4#
- 1...Sh5
- 2.Qxc3#
- 2.Qd4#
- 1...Sd7
- 2.Qxc3#
- 2.Qd4#
- 1...Sh7
- 2.Qxc3#
- 2.Qd4#
- 1...Se8
- 2.Qxc3#
- 2.Qd4#
- 1...Sg8
- 2.Qxc3#
- 2.Qd4#
- 1...e5
- 2.Qf8#
- 1...e6
- 2.Qf8#
- 1...Bxb4!
- 1...Kxb4
- 1.Bd2?
- 1...Bxb4
- 2.Be3#
- 1...Bxb6
- 2.Rc4#
- 1...Sxg4
- 2.Qxc3#
- 2.Qd4#
- 1...Sb1
- 2.Rb5#
- 1...Sd1
- 2.Rb5#
- 1...Sa2
- 2.Rb5#
- 1...Se2
- 2.Rb5#
- 1...Sa4
- 2.Rb5#
- 1...Sce4
- 2.Rb5#
- 1...Sb5
- 2.Rxb5#
- 1...Scd5
- 2.Rb5#
- 1...Sfe4
- 2.Qd4#
- 1...Sfd5
- 2.Qd4#
- 1...Sh5
- 2.Qxc3#
- 2.Qd4#
- 1...Sd7
- 2.Qxc3#
- 2.Qd4#
- 1...Sh7
- 2.Qxc3#
- 2.Qd4#
- 1...Se8
- 2.Qxc3#
- 2.Qd4#
- 1...Sg8
- 2.Qxc3#
- 2.Qd4#
- 1...e5
- 2.Qf8#
- 1...e6
- 2.Qf8#
- 1...Kxb4!
- 1...Bxb4
- 1.Ba3?
- threat
- 2.Rb5#
- 1...Sb5
- 2.Rxb5#
- 1...Bxb4!
- threat
- 1.Bxg5?
- 1...Bxb4
- 2.Be3#
- 1...Bxb6
- 2.Rc4#
- 1...Sxg4
- 2.Bxe7#
- 2.Qxc3#
- 2.Qd4#
- 1...Sb5
- 2.Rxb5#
- 1...Sb1
- 2.Rb5#
- 1...Sd1
- 2.Rb5#
- 1...Sa2
- 2.Rb5#
- 1...Se2
- 2.Rb5#
- 1...Sa4
- 2.Rb5#
- 1...Sce4
- 2.Rb5#
- 1...Scd5
- 2.Rb5#
- 1...Sfe4
- 2.Qd4#
- 1...Sfd5
- 2.Qd4#
- 1...Sh5
- 2.Bxe7#
- 2.Qxc3#
- 2.Qd4#
- 1...Sd7
- 2.Bxe7#
- 2.Qxc3#
- 2.Qd4#
- 1...Sh7
- 2.Bxe7#
- 2.Qxc3#
- 2.Qd4#
- 1...Se8
- 2.Qxc3#
- 2.Qd4#
- 1...Sg8
- 2.Qxc3#
- 2.Qd4#
- 1...e5
- 2.Qf8#
- 1...e6
- 2.Qf8#
- 1...Kxb4!
- 1...Bxb4
- 1.Qxf6?
- threat
- 2.Sa6#
- 2.Qxc3#
- 2.Qd4#
- 2.Qxe7#
- 1...Kxb4
- 2.Sa6#
- 2.Qd4#
- 2.Qxe7#
- 1...Bxb4
- 2.Sd7#
- 2.Be3#
- 2.Qd4#
- 1...Sb5
- 2.Rxb5#
- 1...Sb1
- 2.Sa6#
- 2.Rb5#
- 2.Qd4#
- 2.Qxe7#
- 1...Sd1
- 2.Sa6#
- 2.Rb5#
- 2.Qd4#
- 2.Qxe7#
- 1...Sa2
- 2.Sa6#
- 2.Rb5#
- 2.Qd4#
- 2.Qxe7#
- 1...Se2
- 2.Sa6#
- 2.Rb5#
- 2.Qxe7#
- 1...Sa4
- 2.Sa6#
- 2.Rb5#
- 2.Qd4#
- 2.Qxe7#
- 1...Se4
- 2.Sa6#
- 2.Rb5#
- 2.Qd4#
- 1...Sd5
- 2.Sa6#
- 2.Rb5#
- 2.Qd4#
- 1...e5
- 2.Sa6#
- 2.Qe7#
- 2.Qd6#
- 1...e6
- 2.Qxc3#
- 2.Qd4#
- 2.Qe7#
- 1...exf6!
- threat
- 1.Qxf7?
- threat
- 2.Qc4#
- 2.Qxe7#
- 1...Kxb4
- 2.Sa6#
- 2.Qc4#
- 2.Qxe7#
- 1...Bxb4
- 2.Be3#
- 1...Sb5
- 2.Rxb5#
- 1...Sfe4
- 2.Qc4#
- 1...Sce4
- 2.Rb5#
- 2.Qc4#
- 1...Scd5
- 2.Rb5#
- 1...Se8
- 2.Qc4#
- 1...Sg8
- 2.Qc4#
- 1...e5
- 2.Qc4#
- 2.Qe7#
- 2.Qf8#
- 1...e6
- 2.Qe7#
- 2.Qf8#
- 1...Sfd5!
- threat
- 1.Bb2?
- Keys
- 1.Qh6!
- 1...Kxb4
- 2.Sa6#
- 1...Bxb4
- 2.Be3#
- 1...Bxb6
- 2.Rc4#
- 1...Sxg4
- 2.Sa6#
- 1...Sb5
- 2.Rxb5#
- 1...Sb1
- 2.Rb5#
- 1...Sd1
- 2.Rb5#
- 1...Sa2
- 2.Rb5#
- 1...Se2
- 2.Rb5#
- 1...Sa4
- 2.Rb5#
- 1...Sce4
- 2.Rb5#
- 1...Scd5
- 2.Rb5#
- 1...Sfe4
- 2.Sa6#
- 1...Sfd5
- 2.Sa6#
- 1...Sh5
- 2.Sa6#
- 1...Sd7
- 2.Sa6#
- 1...Sh7
- 2.Sa6#
- 1...Se8
- 2.Sa6#
- 1...Sg8
- 2.Sa6#
- 1...e5
- 2.Qf8#
- 1...e6
- 2.Qf8#
- 1...Kxb4
- 1.Qh6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- K(c);S_FLIGHT,XR(D)::S(J)
- B(b);SBLOCK,XR(D)::B(A)
- B(b);SBLOCK,XP(G)::R1(D)
- S(a);N_GUARD::R1(D)
- S(a);N_GUARD::R1(D),XS(a)
- S(e);OGATE::QAB1(I)
- P(f);OGATEB::QAB(I)
- Tries
- Try
- B(A);
- Vars
- K(c);S_FLIGHT,XR(D)::S(J)
- B(b);SBLOCK,XP(G)::R1(D)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- S(e);OGATE::QAB1(I)
- P(f);OGATEB::QAB(I)
- Refutation
- B(b);XR(D)
- Try
- B(A);
- Vars
- B(b);SBLOCK,XR(D)::B(A)
- B(b);SBLOCK,XP(G)::R1(D)
- S(a);N_GUARD::R1(D)
- S(a);N_GUARD::R1(D),XS(a)
- S(e);OGATE::QAB1(I)
- P(f);OGATEB::QAB(I)
- Refutation
- K(c);P_SPINS(a),S_FLIGHT,XR(D)
- Try
- B(A);
- Threat
- B(A)+R(D),DCHECK
- Vars
- S(a);::B(A)+R(D),DCHECK,XS(a)
- Refutation
- B(b);P_SPINB(b),XR(D)
- Try
- B(A);XP(d)
- Vars
- B(b);SBLOCK,XR(D)::B(A)
- B(b);SBLOCK,XP(G)::R1(D)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- S(e);OGATE::QAB1(I)
- P(f);OGATEB::QAB(I)
- Refutation
- K(c);S_FLIGHT,XR(D)
- Try
- Q(I);XS(e)
- Threat
- DUALS(4)
- Vars
- S(a);N_GUARD::R1(D),XS(a)
- Refutation
- P(f);XQ(I)
- Try
- Q(I);XP(g)
- Threat
- DUALS(2)
- Vars
- B(b);SBLOCK,XR(D)::B(A)
- S(a);N_GUARD::R1(D),XS(a)
- S(e);::QAR1(I)
- S(a);N_GUARD::R1(D)
- Refutation
- S(e);
- Try
- Actual
- Q(I);
- Vars
- K(c);S_FLIGHT,XR(D)::S(J)
- B(b);SBLOCK,XR(D)::B(A)
- B(b);SBLOCK,XP(G)::R1(D)
- S(e);XP(E)::S(J)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- S(e);::S(J)
- P(f);OGATEB::QAB(I)
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).