MESON Chess Problem Database
Problem Display
PID: 272426 (8/Np1N4/bp6/bQ6/RpnkP3/B3nP1K/1PP2P2/8 w - - 0 1)
Smedley, Don A
The Problemist, 1957
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Bxb5
- 2.Sxb5#
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sxc2
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sf5
- 2.Qd5#
- 1...Sxb2
- 2.Bxb2#
- 1...Sd2
- 2.c3#
- 1...Sxa3
- 2.c3#
- 1...Se5
- 2.c3#
- 1...Sd6
- 2.c3#
- 1...bxa3
- 2.Qe5#
- 1...b3
- 2.Qe5#
- 1...Bxb5
- Tries
- 1.Sc8?
- 1...Sxc2
- 2.Qd5#
- 1...Sxb2
- 2.Bxb2#
- 1...Sxa3
- 2.c3#
- 1...bxa3
- 2.Qe5#
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sf5
- 2.Qd5#
- 1...Sd2
- 2.c3#
- 1...Se5
- 2.c3#
- 1...Sd6
- 2.c3#
- 1...b3
- 2.Qe5#
- 1...Bxb5!
- 1...Sxc2
- 1.Sf8?
- threat
- 2.Se6#
- 1...Sxc2
- 2.Qd5#
- 1...Sxb2
- 2.Bxb2#
- 1...Sd5
- 2.Qxd5#
- 1...Bxb5!
- threat
- 1.Bxb4?
- 1...Bxb5
- 2.Sxb5#
- 1...Sxc2
- 2.Qd5#
- 1...Sxb2
- 2.c3#
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sf5
- 2.Qd5#
- 1...Sd2
- 2.Bc3#
- 2.Bc5#
- 2.c3#
- 1...Sa3
- 2.Bc3#
- 2.Bc5#
- 2.c3#
- 1...Se5
- 2.Bc3#
- 2.Bc5#
- 2.c3#
- 1...Sd6
- 2.Bc3#
- 2.Bc5#
- 2.c3#
- 1...Bxb4!
- 1...Bxb5
- 1.Rxb4?
- threat
- 2.Qe5#
- 1...Bxb5
- 2.Sxb5#
- 1...Sxc2
- 2.Qd5#
- 1...Sg4
- 2.Rxc4#
- 2.Qd5#
- 1...Sd5
- 2.Rxc4#
- 2.Qxd5#
- 1...Bxb4!
- threat
- 1.Qxa6?
- threat
- 2.Sb5#
- 1...Sxb2
- 2.Bxb2#
- 1...Sxa3
- 2.Qd3#
- 2.c3#
- 1...bxa6
- 2.Sc6#
- 1...Sd2
- 2.Qd3#
- 2.c3#
- 1...Se5
- 2.c3#
- 1...Sd6
- 2.Qd3#
- 2.c3#
- 1...b5
- 2.Sxb5#
- 1...Sxc2!
- threat
- 1.fxe3+?
- 1...Sxe3
- 2.c3#
- 1...Kxe3!
- 1...Sxe3
- 1.Sc8?
- Keys
- 1.Qc6!
- 1...Sxc2
- 2.Qd5#
- 1...Sxb2
- 2.Bxb2#
- 1...Sxa3
- 2.Qc3#
- 1...bxa3
- 2.Qf6#
- 1...bxc6
- 2.Sxc6#
- 1...Bb5
- 2.Sxb5#
- 1...Sd1
- 2.Qd5#
- 1...Sf1
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sg4
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sf5
- 2.Qd5#
- 1...Sd2
- 2.Qc3#
- 1...Se5
- 2.Qc3#
- 1...Sd6
- 2.Qc3#
- 1...b3
- 2.Qf6#
- 1...b5
- 2.Qc5#
- 1...Sxc2
- 1.Qc6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(f);XQ(I)::S(J),XB(f)
- S(a);N_GUARD::QAR1(I)
- S(a);N_GUARD,XP(B)::QAR1(I)
- S(a);N_GUARD::QAR1(I),XS(a)
- S(c);OGATE,P_SPINP(b),XP(A)::B(D),XS(c)
- S(c);P_SPINP(b)::P(B)
- S(c);P_SPINP(b),XB(D)::P(B)
- P(b);P_SPINS(c),XB(D)::QAB1(I)
- P(b);P_SPINS(c)::QAB1(I)
- Tries
- Try
- S(J);
- Vars
- S(a);N_GUARD,XP(B)::QAR1(I)
- S(c);OGATE,P_SPINP(b),XP(A)::B(D),XS(c)
- S(c);P_SPINP(b),XB(D)::P(B)
- P(b);P_SPINS(c),XB(D)::QAB1(I)
- S(a);N_GUARD::QAR1(I)
- S(a);N_GUARD::QAR1(I),XS(a)
- S(c);P_SPINP(b)::P(B)
- P(b);P_SPINS(c)::QAB1(I)
- Refutation
- B(f);XQ(I)
- Try
- S(K);
- Threat
- S(K)
- Vars
- S(a);N_GUARD,XP(B)::QAR1(I)
- S(c);OGATE,P_SPINP(b),XP(A)::B(D),XS(c)
- S(a);N_GUARD::QAR1(I),XS(a)
- Refutation
- B(f);XQ(I)
- Try
- B(D);XP(b)
- Vars
- B(f);XQ(I)::S(J),XB(f)
- S(a);N_GUARD,XP(B)::QAR1(I)
- S(c);XP(A)::P(B)
- S(a);N_GUARD::QAR1(I)
- S(a);N_GUARD::QAR1(I),XS(a)
- Refutation
- B(e);XB(D)
- Try
- R(G);P_PINS(c),XP(b)
- Threat
- QAB1(I)
- Vars
- B(f);XQ(I)::S(J),XB(f)
- S(a);N_GUARD,XP(B)::QAR1(I)
- Refutation
- B(e);N_SPINS(c),XR(G)
- Try
- Q(I);XB(f)
- Threat
- S(J)
- Vars
- S(c);OGATE,P_SPINP(b),XP(A)::B(D),XS(c)
- P(h);N_GUARD,XQ(I)::S(J)
- S(c);P_SPINP(b)::P(B)
- P(g);::S(J),XP(g)
- Refutation
- S(a);XP(B)
- Try
- P(C);CHECK,XS(a)
- Vars
- S(c);P_SPINP(b),SBLOCK,XP(C)::P(B)
- Refutation
- K(d);S_FLIGHT,XP(C)
- Try
- Actual
- Q(I);
- Vars
- S(a);N_GUARD,XP(B)::QAR1(I)
- S(c);OGATE,P_SPINP(b),XP(A)::B(D),XS(c)
- S(c);OGATE,P_SPINP(b),XB(D)::QAB1(I)
- P(b);P_SPINS(c),XB(D)::QAB(I)
- P(h);XQ(I)::S(J),XP(h)
- B(f);N_GUARD::S(J),XB(f)
- S(a);N_GUARD::QAR1(I)
- S(a);N_GUARD::QAR1(I),XS(a)
- S(c);OGATE,P_SPINP(b)::QAB1(I)
- P(b);P_SPINS(c)::QAB(I)
- P(g);N_GUARD::QAB1(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).