MESON Chess Problem Database
Problem Display
PID: 17749 (2KbN1N1/4pp2/2kppR1p/1p5R/b5p1/Q4pP1/n4B2/8 w - - 0 1)
Bakay, Bela
Dolgozok Vilaglapja, 1949
#2
8 + 12
SOLUTION
- SOUND
- Sets
- 1...Bd1
- 2.Qa8#
- 1...Bc2
- 2.Qa8#
- 1...Bb3
- 2.Qa8#
- 1...Ba5
- 2.Sxe7#
- 1...Bb6
- 2.Sxe7#
- 1...Bc7
- 2.Sxe7#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qxa4#
- 1...d5
- 2.Qc5#
- 1...e5
- 2.Qc5#
- 1...exf6
- 2.Qxd6#
- 1...Bd1
- Tries
- 1.Sc7?
- 1...Bxc7
- 2.Sxe7#
- 1...Bd1
- 2.Qa6#
- 2.Qa8#
- 1...Bc2
- 2.Qa6#
- 2.Qa8#
- 1...Bb3
- 2.Qa6#
- 2.Qa8#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qxa4#
- 1...d5
- 2.Qc5#
- 1...e5
- 2.Qc5#
- 1...exf6!
- 1...Bxc7
- 1.Sg7?
- 1...e5
- 2.Qc5#
- 1...Bd1
- 2.Qa8#
- 1...Bc2
- 2.Qa8#
- 1...Bb3
- 2.Qa8#
- 1...Ba5
- 2.Sxe7#
- 1...Bb6
- 2.Sxe7#
- 1...Bc7
- 2.Sxe7#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qxa4#
- 1...d5
- 2.Qc5#
- 1...exf6!
- 1...e5
- 1.Bg1?
- 1...exf6
- 2.Qxd6#
- 1...e5
- 2.Qc5#
- 1...Bd1
- 2.Qa8#
- 1...Bc2
- 2.Qa8#
- 1...Bb3
- 2.Qa8#
- 1...Ba5
- 2.Sxe7#
- 1...Bb6
- 2.Sxe7#
- 1...Bc7
- 2.Sxe7#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qxa4#
- 1...d5
- 2.Qc5#
- 1...f2!
- 1...exf6
- 1.Be3?
- 1...exf6
- 2.Qxd6#
- 1...e5
- 2.Qc5#
- 1...Bd1
- 2.Qa8#
- 1...Bc2
- 2.Qa8#
- 1...Bb3
- 2.Qa8#
- 1...Ba5
- 2.Sxe7#
- 1...Bb6
- 2.Sxe7#
- 1...Bc7
- 2.Sxe7#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qxa4#
- 1...d5
- 2.Qc5#
- 1...f2!
- 1...exf6
- 1.Bd4?
- 1...exf6
- 2.Qxd6#
- 1...e5
- 2.Qc5#
- 1...Bd1
- 2.Qa8#
- 1...Bc2
- 2.Qa8#
- 1...Bb3
- 2.Qa8#
- 1...Ba5
- 2.Sxe7#
- 1...Bb6
- 2.Sxe7#
- 1...Bc7
- 2.Sxe7#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qxa4#
- 1...d5
- 2.Qc5#
- 1...f2!
- 1...exf6
- 1.Rc5+?
- 1...dxc5
- 2.Qxc5#
- 1...Kb6!
- 1...dxc5
- 1.Re5?
- 1...dxe5
- 2.Qc5#
- 1...exf6
- 2.Qxd6#
- 1...Bd1
- 2.Qa8#
- 1...Bc2
- 2.Qa8#
- 1...Bb3
- 2.Qa8#
- 1...Ba5
- 2.Sxe7#
- 1...Bb6
- 2.Sxe7#
- 1...Bc7
- 2.Sxe7#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qxa4#
- 1...d5
- 2.Qc5#
- 1...h5!
- 1...dxe5
- 1.Rhf5?
- 1...exf5
- 2.Qc5#
- 1...exf6
- 2.Qxd6#
- 1...e5
- 2.Qc5#
- 1...Bd1
- 2.Qa8#
- 1...Bc2
- 2.Qa8#
- 1...Bb3
- 2.Qa8#
- 1...Ba5
- 2.Sxe7#
- 1...Bb6
- 2.Sxe7#
- 1...Bc7
- 2.Sxe7#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qxa4#
- 1...d5
- 2.Qc5#
- 1...h5!
- 1...exf5
- 1.Rxe6?
- threat
- 2.Qc5#
- 1...Bb6
- 2.Sxe7#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qxa4#
- 1...fxe6!
- threat
- 1.Rxf7?
- 1...Bd1
- 2.Qa8#
- 1...Bc2
- 2.Qa8#
- 1...Bb3
- 2.Qa8#
- 1...Ba5
- 2.Sxe7#
- 1...Bb6
- 2.Sxe7#
- 1...Bc7
- 2.Sxe7#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qxa4#
- 1...d5
- 2.Qc5#
- 1...e5!
- 1...Bd1
- 1.Qb4?
- 1...exf6
- 2.Qxd6#
- 1...e5
- 2.Qc5#
- 2.Qe4#
- 1...Bd1
- 2.Qxb5#
- 1...Bc2
- 2.Qxb5#
- 1...Bb3
- 2.Qxb5#
- 1...Ba5
- 2.Sxe7#
- 1...Bb6
- 2.Sxe7#
- 1...Bc7
- 2.Sxe7#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...d5
- 2.Qc5#
- 1...Sxb4!
- 1...exf6
- 1.Qxf3+?
- 1...d5
- 2.Qxd5#
- 1...gxf3!
- 1...d5
- 1.Qxa4?
- threat
- 2.Qxb5#
- 2.Qa8#
- 1...e5
- 2.Qe4#
- 2.Qa8#
- 1...Ba5
- 2.Sxe7#
- 2.Qxb5#
- 1...Sc3
- 2.Qa8#
- 1...d5
- 2.Qa8#
- 1...bxa4!
- threat
- 1.Sc7?
- Keys
- 1.Qd3!
- 1...exf6
- 2.Qxd6#
- 1...Bd1
- 2.Qxb5#
- 1...Bc2
- 2.Qxb5#
- 1...Bb3
- 2.Qxb5#
- 1...Ba5
- 2.Sxe7#
- 1...Bb6
- 2.Sxe7#
- 1...Bc7
- 2.Sxe7#
- 1...Sc1
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sb4
- 2.Qc3#
- 1...b4
- 2.Qc4#
- 1...d5
- 2.Qxd5#
- 1...e5
- 2.Qe4#
- 1...exf6
- 1.Qd3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(c);OGATE::QAB(B)
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(e);OGATEB::QAB(B),XB(c)
- P(g);N_GUARD,P_SPINP(h)::QAR1(B)
- P(h);P_SPINP(g)::QAR1(B)
- P(j);N_GUARD,XR(E)::QAR1(B),XP(g)
- Tries
- Try
- S(G);
- Vars
- B(l);N_GUARD,XS(G)::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(e);OGATEB::QAB(B),XB(c)
- P(g);N_GUARD,P_SPINP(h)::QAR1(B)
- P(h);P_SPINP(g)::QAR1(B)
- Refutation
- P(j);XR(E)
- Try
- S(G);
- Vars
- P(h);P_SPINP(g)::QAR1(B)
- B(c);OGATE::QAB(B)
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(e);OGATEB::QAB(B),XB(c)
- P(g);N_GUARD,P_SPINP(h)::QAR1(B)
- Refutation
- P(j);XR(E)
- Try
- B(A);
- Vars
- P(j);N_GUARD,XR(E)::QAR1(B),XP(g)
- P(h);P_SPINP(g)::QAR1(B)
- B(c);OGATE::QAB(B)
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(e);OGATEB::QAB(B),XB(c)
- P(g);N_GUARD,P_SPINP(h)::QAR1(B)
- Refutation
- P(b);
- Try
- B(A);
- Vars
- P(j);N_GUARD,XR(E)::QAR1(B),XP(g)
- P(h);P_SPINP(g)::QAR1(B)
- B(c);OGATE::QAB(B)
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(e);OGATEB::QAB(B),XB(c)
- P(g);N_GUARD,P_SPINP(h)::QAR1(B)
- Refutation
- P(b);
- Try
- B(A);
- Vars
- P(j);N_GUARD,XR(E)::QAR1(B),XP(g)
- P(h);P_SPINP(g)::QAR1(B)
- B(c);OGATE::QAB(B)
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(e);OGATEB::QAB(B),XB(c)
- P(g);N_GUARD,P_SPINP(h)::QAR1(B)
- Refutation
- P(b);
- Try
- R(D);CHECK
- Vars
- P(g);OGATE,P_SPINP(h),XR(D)::QAR1(B),XP(g)
- Refutation
- K(f);P-FLIGHT
- Try
- R(D);
- Vars
- P(g);N_GUARD,P_SPINP(h),XR(D)::QAR1(B)
- P(j);N_GUARD,XR(E)::QAR1(B),XP(g)
- B(c);OGATE::QAB(B)
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(e);OGATEB::QAB(B),XB(c)
- P(g);N_GUARD,P_SPINP(h)::QAR1(B)
- Refutation
- P(i);
- Try
- R(D);
- Vars
- P(h);P_SPINP(g),XR(D)::QAR1(B)
- P(j);N_GUARD,XR(E)::QAR1(B),XP(g)
- P(h);P_SPINP(g)::QAR1(B)
- B(c);OGATE::QAB(B)
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(e);OGATEB::QAB(B),XB(c)
- P(g);N_GUARD,P_SPINP(h)::QAR1(B)
- Refutation
- P(i);
- Try
- R(E);P_PINP(g),XP(h)
- Threat
- QAR1(B)
- Vars
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- P(e);OGATEB::QAB(B),XB(c)
- Refutation
- P(k);N_SPINP(g),XR(E)
- Try
- R(E);XP(k)
- Vars
- B(c);OGATE::QAB(B)
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(e);OGATEB::QAB(B),XB(c)
- P(g);N_GUARD::QAR1(B)
- Refutation
- P(h);
- Try
- Q(B);
- Vars
- P(j);N_GUARD,XR(E)::QAR1(B),XP(g)
- B(c);N_GUARD::QAB1(B),XP(e)
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(g);N_GUARD,P_SPINP(h)::QAR1(B)
- Refutation
- S(a);XQ(B)
- Try
- Q(B);CHECK,XP(b)
- Vars
- P(g);P_SPINP(g),S_CUTP(h)::QAB1(B),XP(g)
- Refutation
- P(d);XQ(B)
- Try
- Q(B);P_PINP(e),XB(c)
- Threat
- DUALS(2)
- Vars
- S(a);::QAB(B)
- P(g);::QAB(B)
- Refutation
- P(e);N_SPINP(e),XQ(B)
- Try
- Actual
- Q(B);
- Vars
- P(j);N_GUARD,XR(E)::QAR1(B),XP(g)
- B(c);N_GUARD::QAB1(B),XP(e)
- B(l);N_GUARD::S(H),XP(j)
- S(a);N_GUARD::QAR(B)
- S(a);N_GUARD::QAR(B),XS(a)
- P(e);N_GUARD::QAR2(B)
- P(g);P_SPINP(h)::QAB1(B),XP(g)
- P(h);P_SPINP(g)::QAB(B)
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).