MESON Chess Problem Database
Problem Display
PID: 251312 (4B3/n6p/p3N3/P1P1p1R1/KPQBk1nr/4N3/6P1/1b6 w - - 0 1)
Gevers, Raymond
Die Schwalbe, 1930
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Rxg4#
- 1...Rh2
- 2.Rxg4#
- 1...Rh3
- 2.Rxg4#
- 1...Rh5
- 2.Rxg4#
- 1...Rh6
- 2.Rxg4#
- 1...Ba2
- 2.Qc2#
- 1...Bc2+
- 2.Qxc2#
- 1...Bd3
- 2.Qd5#
- 1...Sf2
- 2.Rxe5#
- 1...Sh2
- 2.Rxe5#
- 1...Sxe3
- 2.Rxe5#
- 1...Sf6
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...Sb5
- 2.Bc6#
- 1...Sc6
- 2.Bxc6#
- 1...Sc8
- 2.Bc6#
- 1...exd4
- 2.Qxd4#
- 1...h5
- 2.Bg6#
- 1...h6
- 2.Bg6#
- 1...Rh1
- Tries
- 1.Ka3?
- 1...Sxe3
- 2.Rxe5#
- 1...exd4
- 2.Qxd4#
- 1...Rh1
- 2.Rxg4#
- 1...Rh2
- 2.Rxg4#
- 1...Rh3
- 2.Rxg4#
- 1...Rh5
- 2.Rxg4#
- 1...Rh6
- 2.Rxg4#
- 1...Ba2
- 2.Qc2#
- 1...Bc2
- 2.Qxc2#
- 1...Bd3
- 2.Qd5#
- 1...Sf2
- 2.Rxe5#
- 1...Sh2
- 2.Rxe5#
- 1...Sf6
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...Sc6
- 2.Bxc6#
- 1...Sc8
- 2.Bc6#
- 1...h5
- 2.Bg6#
- 1...h6
- 2.Bg6#
- 1...Sb5+!
- 1...Sxe3
- 1.Kb3?
- 1...Bc2+
- 2.Qxc2#
- 1...Sxe3
- 2.Rxe5#
- 1...exd4
- 2.Qxd4#
- 1...Rh1
- 2.Rxg4#
- 1...Rh2
- 2.Rxg4#
- 1...Rh3
- 2.Rxg4#
- 1...Rh5
- 2.Rxg4#
- 1...Rh6
- 2.Rxg4#
- 1...Bd3
- 2.Qd5#
- 1...Sf2
- 2.Rxe5#
- 1...Sh2
- 2.Rxe5#
- 1...Sf6
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...Sb5
- 2.Bc6#
- 1...Sc6
- 2.Bxc6#
- 1...Sc8
- 2.Bc6#
- 1...h5
- 2.Bg6#
- 1...h6
- 2.Bg6#
- 1...Ba2+!
- 1...Bc2+
- 1.Sd1?
- threat
- 2.Sc3#
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 2.Bxe5#
- 1...exd4
- 2.Qxd4#
- 1...Rh3
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 2.Bxe5#
- 1...Ba2
- 2.Sc3#
- 1...Bd3
- 2.Sc3#
- 1...Sf2
- 2.Sxf2#
- 2.Sc3#
- 2.Ba1#
- 2.Bb2#
- 2.Bxf2#
- 2.Bc3#
- 2.Be3#
- 2.Bxe5#
- 2.Rxe5#
- 1...Se3
- 2.Sf2#
- 2.Sc3#
- 2.Bxe3#
- 2.Rxe5#
- 1...Sb5
- 2.Bc6#
- 1...Sc6
- 2.Sc3#
- 2.Bxc6#
- 1...Bc2+!
- threat
- 1.Sf1?
- threat
- 2.Sd2#
- 2.Sg3#
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 2.Bxe5#
- 1...exd4
- 2.Qxd4#
- 1...Rh3
- 2.Sd2#
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 2.Bxe5#
- 1...Ba2
- 2.Sd2#
- 2.Sg3#
- 1...Bd3
- 2.Sd2#
- 2.Sg3#
- 1...Sf2
- 2.Sd2#
- 2.Sg3#
- 2.Ba1#
- 2.Bb2#
- 2.Bxf2#
- 2.Bc3#
- 2.Be3#
- 2.Bxe5#
- 2.Rxe5#
- 1...Se3
- 2.Sd2#
- 2.Sg3#
- 2.Bxe3#
- 2.Rxe5#
- 1...Sb5
- 2.Sd2#
- 2.Sg3#
- 2.Bc6#
- 1...Sc6
- 2.Sd2#
- 2.Sg3#
- 2.Bxc6#
- 1...Bc2+!
- threat
- 1.Sxg4?
- threat
- 2.Sf2#
- 2.Sf6#
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 2.Bxe5#
- 2.Rxe5#
- 1...Rxg4
- 2.Bg1#
- 2.Bf2#
- 2.Rxe5#
- 1...exd4
- 2.Re5#
- 2.Qe2#
- 2.Qxd4#
- 1...Rh5
- 2.Sf2#
- 2.Sf6#
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 2.Bxe5#
- 1...Rh6
- 2.Sf2#
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 2.Bxe5#
- 2.Rxe5#
- 1...Ba2
- 2.Sf2#
- 2.Sf6#
- 2.Rxe5#
- 1...Bd3
- 2.Sf2#
- 2.Sf6#
- 2.Rxe5#
- 1...Sb5
- 2.Sf2#
- 2.Sf6#
- 2.Bc6#
- 2.Rxe5#
- 1...Sc6
- 2.Sf2#
- 2.Sf6#
- 2.Bxc6#
- 1...Bc2+!
- threat
- 1.Sf5?
- threat
- 2.Sg3#
- 2.Sd6#
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 1...exd4
- 2.Qxd4#
- 1...Rh3
- 2.Sd6#
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 1...Ba2
- 2.Sg3#
- 2.Sd6#
- 1...Bd3
- 2.Sg3#
- 2.Sd6#
- 1...Sf2
- 2.Sg3#
- 2.Sd6#
- 2.Ba1#
- 2.Bb2#
- 2.Bxf2#
- 2.Bc3#
- 2.Be3#
- 1...Se3
- 2.Sg3#
- 2.Sd6#
- 2.Bxe3#
- 1...Sb5
- 2.Sg3#
- 2.Bc6#
- 1...Sc6
- 2.Sg3#
- 2.Sd6#
- 2.Bxc6#
- 1...Sc8
- 2.Sg3#
- 2.Ba1#
- 2.Bg1#
- 2.Bb2#
- 2.Bf2#
- 2.Bc3#
- 2.Be3#
- 2.Bc6#
- 1...Bc2+!
- threat
- 1.Qb3?
- threat
- 2.Qxb1#
- 1...Sxe3
- 2.Rxe5#
- 1...Rh1
- 2.Rxg4#
- 1...Ba2
- 2.Qc2#
- 1...Bc2
- 2.Qxc2#
- 1...Bd3
- 2.Qd5#
- 1...Sf2
- 2.Rxe5#
- 1...exd4!
- threat
- 1.Qc3?
- 1...Bc2+
- 2.Qxc2#
- 1...Sxe3
- 2.Rxe5#
- 1...exd4
- 2.Qxd4#
- 1...Sb5
- 2.Bc6#
- 1...Rh1
- 2.Rxg4#
- 1...Rh2
- 2.Rxg4#
- 1...Rh3
- 2.Rxg4#
- 1...Rh5
- 2.Rxg4#
- 1...Rh6
- 2.Rxg4#
- 1...Ba2
- 2.Qc2#
- 1...Sf2
- 2.Rxe5#
- 1...Sh2
- 2.Rxe5#
- 1...Sf6
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...Sc6
- 2.Bxc6#
- 1...Sc8
- 2.Bc6#
- 1...h5
- 2.Bg6#
- 1...h6
- 2.Bg6#
- 1...Bd3!
- 1...Bc2+
- 1.b5?
- 1...Bc2+
- 2.Qxc2#
- 1...Sxe3
- 2.Rxe5#
- 1...Sxb5
- 2.Bc6#
- 1...exd4
- 2.Qxd4#
- 1...Rh1
- 2.Rxg4#
- 1...Rh2
- 2.Rxg4#
- 1...Rh3
- 2.Rxg4#
- 1...Rh5
- 2.Rxg4#
- 1...Rh6
- 2.Rxg4#
- 1...Ba2
- 2.Qc2#
- 1...Bd3
- 2.Qd5#
- 1...Sf2
- 2.Rxe5#
- 1...Sh2
- 2.Rxe5#
- 1...Sf6
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...Sc6
- 2.Bxc6#
- 1...Sc8
- 2.Bc6#
- 1...h5
- 2.Bg6#
- 1...h6
- 2.Bg6#
- 1...axb5+!
- 1...Bc2+
- 1.c6?
- threat
- 2.Bc5#
- 2.Bb6#
- 2.Bxa7#
- 1...Bc2+
- 2.Qxc2#
- 1...Sxe3
- 2.Rxe5#
- 1...Sxc6
- 2.Bxc6#
- 1...exd4
- 2.Qxd4#
- 1...Ba2
- 2.Qc2#
- 1...Bd3
- 2.Qd5#
- 1...Sc8
- 2.Bc5#
- 2.Bb6#
- 2.Ba7#
- 1...Sb5!
- threat
- 1.Ka3?
- Keys
- 1.Qe2!
- 1...Bc2+
- 2.Qxc2#
- 1...Sxe3
- 2.Rxe5#
- 1...exd4
- 2.Sxg4#
- 1...Sb5
- 2.Bc6#
- 1...Rh1
- 2.Rxg4#
- 1...Rh2
- 2.Rxg4#
- 1...Rh3
- 2.Rxg4#
- 1...Rh5
- 2.Rxg4#
- 1...Rh6
- 2.Rxg4#
- 1...Ba2
- 2.Qc2#
- 1...Bd3
- 2.Qf3#
- 1...Sf2
- 2.Rxe5#
- 1...Sh2
- 2.Rxe5#
- 1...Sf6
- 2.Rxe5#
- 1...Sh6
- 2.Rxe5#
- 1...Sc6
- 2.Bxc6#
- 1...Sc8
- 2.Bc6#
- 1...h5
- 2.Bg6#
- 1...h6
- 2.Bg6#
- 1...Bc2+
- 1.Qe2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(d);N_GUARD::R(I),XS(c)
- B(a);N_GUARD::QAB(E)
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- B(a);SBLOCK::QAB1(E)
- S(c);N_GUARD::R1(I),XP(e)
- S(c);N_GUARD,XS(B)::R1(I),XP(e)
- S(g);N_GUARD::B(K)
- S(g);N_GUARD::B(K),XS(g)
- P(e);OGATE,P_SPINP(e),XB(F)::QAR1(E),XP(e)
- P(h);N_GUARD::B(K)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- S(c);N_GUARD,XS(B)::R1(I),XP(e)
- P(e);OGATE,P_SPINP(e),XB(F)::QAR1(E),XP(e)
- R(d);N_GUARD::R(I),XS(c)
- R(d);N_GUARD,P_PINS(B)::R(I),XS(c)
- B(a);N_GUARD::QAB(E)
- B(a);N_GUARD::QAB(E),XB(a)
- B(a);SBLOCK::QAB1(E)
- S(c);N_GUARD::R1(I),XP(e)
- S(g);N_GUARD::B(K),XS(g)
- S(g);N_GUARD::B(K)
- P(h);N_GUARD::B(K)
- Refutation
- S(g);CHECK
- Try
- K(C);S_FLIGHT
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- S(c);N_GUARD,XS(B)::R1(I),XP(e)
- P(e);OGATE,P_SPINP(e),XB(F)::QAR1(E),XP(e)
- R(d);N_GUARD::R(I),XS(c)
- R(d);N_GUARD,P_PINS(B)::R(I),XS(c)
- B(a);SBLOCK::QAB1(E)
- S(c);N_GUARD::R1(I),XP(e)
- S(g);N_GUARD::B(K)
- S(g);N_GUARD::B(K),XS(g)
- P(h);N_GUARD::B(K)
- Refutation
- B(a);CHECK
- Try
- S(B);
- Threat
- DUALS(8)
- Vars
- P(e);OGATE,P_SPINP(e),XB(F)::QAR1(E),XP(e)
- B(a);::S(B)
- S(g);N_GUARD::B(K)
- Refutation
- B(a);CHECK
- Try
- S(B);
- Threat
- DUALS(9)
- Vars
- P(e);OGATE,P_SPINP(e),XB(F)::QAR1(E),XP(e)
- Refutation
- B(a);CHECK
- Try
- S(B);XS(c)
- Threat
- DUALS(10)
- Refutation
- B(a);CHECK
- Try
- S(B);
- Threat
- DUALS(8)
- Vars
- P(e);OGATE,P_SPINP(e),XB(F)::QAR1(E),XP(e)
- Refutation
- B(a);CHECK
- Try
- Q(E);
- Threat
- QAB(E),XB(a)
- Vars
- S(c);N_GUARD,XS(B)::R1(I),XP(e)
- R(d);N_GUARD::R(I),XS(c)
- B(a);N_GUARD::QAB(E)
- B(a);N_GUARD,P_PINQ(E)::QAB(E),XB(a)
- B(a);SBLOCK::QAB1(E)
- S(c);N_GUARD::R1(I),XP(e)
- Refutation
- P(e);XB(F)
- Try
- Q(E);
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- S(c);N_GUARD,XS(B)::R1(I),XP(e)
- P(e);OGATE,XB(F)::QAR1(E),XP(e)
- S(g);N_GUARD::B(K)
- R(d);N_GUARD::R(I),XS(c)
- B(a);N_GUARD::QAB(E)
- S(c);N_GUARD::R1(I),XP(e)
- S(g);N_GUARD::B(K),XS(g)
- P(h);N_GUARD::B(K)
- Refutation
- B(a);
- Try
- P(D);
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- S(c);N_GUARD,XS(B)::R1(I),XP(e)
- S(g);N_GUARD,XP(D)::B(K)
- P(e);OGATE,P_SPINP(e),XB(F)::QAR1(E),XP(e)
- R(d);N_GUARD::R(I),XS(c)
- B(a);N_GUARD::QAB(E)
- B(a);SBLOCK::QAB1(E)
- S(c);N_GUARD::R1(I),XP(e)
- S(g);N_GUARD::B(K),XS(g)
- S(g);N_GUARD::B(K)
- P(h);N_GUARD::B(K)
- Refutation
- P(f);CHECK,XP(D)
- Try
- P(H);
- Threat
- DUALS(3)
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- S(c);N_GUARD,XS(B)::R1(I),XP(e)
- S(g);OGATE,XP(H)::B(K),XS(g)
- P(e);OGATE,P_SPINP(e),XB(F)::QAR1(E),XP(e)
- B(a);N_GUARD::QAB(E)
- B(a);SBLOCK::QAB1(E)
- Refutation
- S(g);
- Try
- Actual
- Q(E);
- Vars
- B(a);CHECK,N_GUARD::QAB(E),XB(a)
- S(c);N_GUARD,P_SPINS(c),XS(B)::R1(I),XP(e)
- P(e);XB(F)::QAR(E)+S(B),XS(c)
- S(g);N_GUARD::B(K)
- R(d);N_GUARD::R(I),XS(c)
- B(a);N_GUARD::QAB(E)
- B(a);SBLOCK::QAB1(E)
- S(c);N_GUARD::R1(I),XP(e)
- S(g);N_GUARD::B(K),XS(g)
- P(h);N_GUARD::B(K)
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).