MESON Chess Problem Database
Problem Display
PID: 583 (2N5/2p4p/2P4R/1n4N1/Rp1kP3/1P1pn2p/1P4pB/1B2Q1K1 w - - 0 1)
Beal, Edward W
The Observer, 1966
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Kc5
- 2.Qxb4#
- 1...Sd1
- 2.Se6#
- 1...Sf1
- 2.Se6#
- 1...Sc2
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd6
- 2.Qc3#
- 1...Sa7
- 2.Qc3#
- 1...d2
- 2.Se6#
- 1...Kc5
- Tries
- 1.Sf3+?
- 1...Kc5
- 2.Qxb4#
- 1...Kxe4!
- 1...Kc5
- 1.Sa7?
- 1...Sxa7
- 2.Qc3#
- 1...Sd1
- 2.Se6#
- 1...Sf1
- 2.Se6#
- 1...Sc2
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd6
- 2.Qc3#
- 1...d2
- 2.Se6#
- 1...Kc5!
- 1...Sxa7
- 1.Se7?
- 1...Sd1
- 2.Se6#
- 1...Sf1
- 2.Se6#
- 1...Sc2
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd6
- 2.Qc3#
- 1...Sa7
- 2.Qc3#
- 1...d2
- 2.Se6#
- 1...Kc5!
- 1...Sd1
- 1.Ba2?
- 1...Kc5
- 2.Qxb4#
- 1...Sd1
- 2.Se6#
- 1...Sf1
- 2.Se6#
- 1...Sc2
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd6
- 2.Qc3#
- 1...Sa7
- 2.Qc3#
- 1...d2!
- 1...Kc5
- 1.Bc2?
- 1...Kc5
- 2.Qxb4#
- 1...Sxc2
- 2.Se6#
- 1...Sd1
- 2.Se6#
- 1...Sf1
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd6
- 2.Qc3#
- 1...Sa7
- 2.Qc3#
- 1...d2
- 2.Se6#
- 1...dxc2!
- 1...Kc5
- 1.Bg3?
- 1...Kc5
- 2.Qxb4#
- 1...Sd1
- 2.Se6#
- 1...Sf1
- 2.Se6#
- 1...Sc2
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd6
- 2.Qc3#
- 1...Sa7
- 2.Qc3#
- 1...d2
- 2.Se6#
- 1...h2+!
- 1...Kc5
- 1.Bf4?
- threat
- 2.Qxe3#
- 1...Kc5
- 2.Qxb4#
- 1...Sd1
- 2.Se6#
- 2.Qxb4#
- 1...Sf1
- 2.Se6#
- 2.Qxb4#
- 1...Sc2
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 2.Qxb4#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 2.Qxb4#
- 1...h2+!
- threat
- 1.Be5+?
- 1...Kc5
- 2.Qxb4#
- 1...Kxe5!
- 1...Kc5
- 1.Bxc7?
- 1...Kc5
- 2.Bb6#
- 2.Qxb4#
- 1...Sxc7
- 2.Qc3#
- 1...Sd6
- 2.Qc3#
- 1...Sd1
- 2.Se6#
- 1...Sf1
- 2.Se6#
- 1...Sc2
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sa7
- 2.Qc3#
- 1...d2
- 2.Se6#
- 1...h2+!
- 1...Kc5
- 1.Rxb4+?
- 1...Sc4
- 2.Se6#
- 2.Rxc4#
- 2.Qf2#
- 1...Kc5!
- 1...Sc4
- 1.Rxh3?
- threat
- 2.Qxe3#
- 1...Sd1
- 2.Se6#
- 2.Qxb4#
- 1...Sf1
- 2.Se6#
- 2.Qxb4#
- 1...Sc2
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 2.Qxb4#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 2.Qxb4#
- 1...Kc5!
- threat
- 1.Rd6+?
- 1...Kc5
- 2.Se6#
- 2.Qxb4#
- 1...Sd5
- 2.Se6#
- 2.Rxd5#
- 2.Qf2#
- 1...Sxd6
- 2.Qc3#
- 1...cxd6!
- 1...Kc5
- 1.Rxh7?
- 1...Sd1
- 2.Se6#
- 1...Sf1
- 2.Se6#
- 1...Sc2
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sd6
- 2.Qc3#
- 1...Sa7
- 2.Qc3#
- 1...d2
- 2.Se6#
- 1...Kc5!
- 1...Sd1
- 1.Sf3+?
- Keys
- 1.Ra5!
- 1...Kc5
- 2.Qxe3#
- 1...Sd1
- 2.Se6#
- 1...Sf1
- 2.Se6#
- 1...Sc2
- 2.Se6#
- 1...Sc4
- 2.Se6#
- 1...Sg4
- 2.Se6#
- 1...Sd5
- 2.Se6#
- 1...Sf5
- 2.Se6#
- 1...Sa3
- 2.Be5#
- 1...Sc3
- 2.Be5#
- 1...Sd6
- 2.Be5#
- 1...Sa7
- 2.Be5#
- 1...d2
- 2.Se6#
- 1...Kc5
- 1.Ra5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- K(f);N_SPINP(e),S_FLIGHT::QAB1(B),XP(e)
- S(c);::S(I)
- S(c);N_SPINP(e)::S(I)
- S(g);N_GUARD::QAB1(B)
- S(g);N_GUARD::QAB1(B),XS(g)
- P(b);::S(I)
- Tries
- Try
- S(I);CHECK
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(B),XP(e)
- Refutation
- K(f);N_SPINP(e),P-FLIGHT,P_SPINP(b),P_SPINS(c),XP(H)
- Try
- S(L);
- Vars
- S(g);N_GUARD,XS(L)::QAB1(B)
- S(c);::S(I)
- S(c);N_SPINP(e)::S(I)
- S(g);N_GUARD::QAB1(B)
- S(g);N_GUARD::QAB1(B),XS(g)
- P(b);::S(I)
- Refutation
- K(f);N_SPINP(e),S_FLIGHT
- Try
- S(L);
- Vars
- S(c);::S(I)
- S(c);N_SPINP(e)::S(I)
- S(g);N_GUARD::QAB1(B)
- S(g);N_GUARD::QAB1(B),XS(g)
- P(b);::S(I)
- Refutation
- K(f);N_SPINP(e),S_FLIGHT
- Try
- B(A);
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(B),XP(e)
- S(c);::S(I)
- S(c);N_SPINP(e)::S(I)
- S(g);N_GUARD::QAB1(B)
- S(g);N_GUARD::QAB1(B),XS(g)
- Refutation
- P(b);
- Try
- B(A);
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(B),XP(e)
- S(c);XB(A)::S(I)
- S(c);::S(I)
- S(c);N_SPINP(e)::S(I)
- S(g);N_GUARD::QAB1(B)
- S(g);N_GUARD::QAB1(B),XS(g)
- P(b);::S(I)
- Refutation
- P(b);XB(A)
- Try
- B(E);
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(B),XP(e)
- S(c);::S(I)
- S(c);N_SPINP(e)::S(I)
- S(g);N_GUARD::QAB1(B)
- S(g);N_GUARD::QAB1(B),XS(g)
- P(b);::S(I)
- Refutation
- P(d);CHECK
- Try
- B(E);
- Threat
- QAB1(B),XS(c)
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(B),XP(e)
- S(c);::S(I)
- S(c);N_SPINP(e)::S(I)
- Refutation
- P(d);CHECK
- Try
- B(E);CHECK
- Vars
- K(f);N_SPINP(e),S_FLIGHT::QAB1(B),XP(e)
- Refutation
- K(f);N_SPINP(e),S_FLIGHT,XB(E)
- Try
- B(E);XP(h)
- Vars
- S(g);N_GUARD,XB(E)::QAB1(B)
- S(g);N_GUARD::QAB1(B)
- S(c);::S(I)
- S(c);N_SPINP(e)::S(I)
- S(g);N_GUARD::QAB1(B),XS(g)
- P(b);::S(I)
- Refutation
- P(d);CHECK
- Try
- R(G);CHECK,XP(e)
- Refutation
- K(f);S_FLIGHT
- Try
- R(K);XP(d)
- Threat
- QAB1(B),XS(c)
- Vars
- S(c);::S(I)
- S(c);N_SPINP(e)::S(I)
- Refutation
- K(f);N_SPINP(e),S_FLIGHT
- Try
- R(K);CHECK
- Vars
- S(g);XR(K)::QAB1(B)
- Refutation
- P(h);XR(K)
- Try
- R(K);XP(i)
- Vars
- S(c);::S(I)
- S(c);N_SPINP(e)::S(I)
- S(g);N_GUARD::QAB1(B)
- S(g);N_GUARD::QAB1(B),XS(g)
- P(b);::S(I)
- Refutation
- K(f);N_SPINP(e),S_FLIGHT
- Try
- Actual
- R(G);N_PINP(e)
- Vars
- K(f);P_SPINS(g),S_FLIGHT::QAB(B),XS(c)
- S(c);::S(I)
- S(g);::B(E)
- P(b);::S(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).