MESON Chess Problem Database
Problem Display
PID: 3143 (1b2QR2/3p1N1p/3Pr2B/1N6/K1PPk1P1/P2p4/2BR1nP1/4r3 w - - 0 1)
Stewart, John
Source?, 1919
#2
14 + 8
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Re2#
- 1...Rb1
- 2.Re2#
- 1...Rc1
- 2.Re2#
- 1...Rd1
- 2.Re2#
- 1...Rf1
- 2.Re2#
- 1...Rg1
- 2.Re2#
- 1...Rh1
- 2.Re2#
- 1...Re2
- 2.Rxe2#
- 1...Re3
- 2.Sg5#
- 1...Re5
- 2.Qxe5#
- 1...Re7
- 2.Qxe7#
- 1...Rxe8
- 2.Rxe8#
- 1...Bxd6
- 2.Sfxd6#
- 2.Qa8#
- 1...Ba7
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...Sd1
- 2.Bxd3#
- 1...Sh1
- 2.Bxd3#
- 1...Sh3
- 2.Bxd3#
- 1...Sxg4
- 2.Bxd3#
- 1...dxc2
- 2.Sc3#
- 1...Ra1
- Tries
- 1.Kb3?
- 1...Rxe8
- 2.Rxe8#
- 1...Bxd6
- 2.Sfxd6#
- 2.Qa8#
- 1...Sxg4
- 2.Bxd3#
- 1...dxc2
- 2.Sc3#
- 1...Ra1
- 2.Re2#
- 1...Rc1
- 2.Re2#
- 1...Rd1
- 2.Re2#
- 1...Rf1
- 2.Re2#
- 1...Rg1
- 2.Re2#
- 1...Rh1
- 2.Re2#
- 1...Re2
- 2.Rxe2#
- 1...Re3
- 2.Sg5#
- 1...Re5
- 2.Qxe5#
- 1...Re7
- 2.Qxe7#
- 1...Ba7
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...Sd1
- 2.Bxd3#
- 1...Sh1
- 2.Bxd3#
- 1...Sh3
- 2.Bxd3#
- 1...Rb1+!
- 1...Rxe8
- 1.Kb4?
- 1...Bxd6+
- 2.Sfxd6#
- 1...Rxe8
- 2.Rxe8#
- 1...Sxg4
- 2.Bxd3#
- 1...dxc2
- 2.Sc3#
- 1...Ra1
- 2.Re2#
- 1...Rc1
- 2.Re2#
- 1...Rd1
- 2.Re2#
- 1...Rf1
- 2.Re2#
- 1...Rg1
- 2.Re2#
- 1...Rh1
- 2.Re2#
- 1...Re2
- 2.Rxe2#
- 1...Re3
- 2.Sg5#
- 1...Re5
- 2.Qxe5#
- 1...Re7
- 2.Qxe7#
- 1...Ba7
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...Sd1
- 2.Bxd3#
- 1...Sh1
- 2.Bxd3#
- 1...Sh3
- 2.Bxd3#
- 1...Rb1+!
- 1...Bxd6+
- 1.Ka5?
- 1...Rxe8
- 2.Rxe8#
- 1...Bxd6
- 2.Sfxd6#
- 2.Qa8#
- 1...Sxg4
- 2.Bxd3#
- 1...dxc2
- 2.Sc3#
- 1...Ra1
- 2.Re2#
- 1...Rb1
- 2.Re2#
- 1...Rc1
- 2.Re2#
- 1...Rd1
- 2.Re2#
- 1...Rf1
- 2.Re2#
- 1...Rg1
- 2.Re2#
- 1...Rh1
- 2.Re2#
- 1...Re2
- 2.Rxe2#
- 1...Re3
- 2.Sg5#
- 1...Re5
- 2.Qxe5#
- 1...Re7
- 2.Qxe7#
- 1...Ba7
- 2.Qa8#
- 1...Sd1
- 2.Bxd3#
- 1...Sh1
- 2.Bxd3#
- 1...Sh3
- 2.Bxd3#
- 1...Bc7+!
- 1...Rxe8
- 1.Bb1?
- 1...Rxe8
- 2.Rxe8#
- 1...Bxd6
- 2.Sfxd6#
- 2.Qa8#
- 1...Sxg4
- 2.Bxd3#
- 1...Rc1
- 2.Re2#
- 1...Rd1
- 2.Re2#
- 1...Rf1
- 2.Re2#
- 1...Rg1
- 2.Re2#
- 1...Rh1
- 2.Re2#
- 1...Re2
- 2.Rxe2#
- 1...Re3
- 2.Sg5#
- 1...Re5
- 2.Qxe5#
- 1...Re7
- 2.Qxe7#
- 1...Ba7
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...Sd1
- 2.Bxd3#
- 1...Sh1
- 2.Bxd3#
- 1...Sh3
- 2.Bxd3#
- 1...Rxb1!
- 1...Rxe8
- 1.Rxf2?
- 1...Rxe8
- 2.Rxe8#
- 1...Bxd6
- 2.Sfxd6#
- 2.Qa8#
- 1...Ra1
- 2.Re2#
- 1...Rb1
- 2.Re2#
- 1...Rc1
- 2.Re2#
- 1...Rd1
- 2.Re2#
- 1...Rf1
- 2.Re2#
- 1...Rg1
- 2.Re2#
- 1...Rh1
- 2.Re2#
- 1...Re2
- 2.Rxe2#
- 1...Re3
- 2.Sg5#
- 2.Rf4#
- 1...Re5
- 2.Qxe5#
- 1...Re7
- 2.Qxe7#
- 1...Ba7
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...dxc2!
- 1...Rxe8
- 1.Rxd3?
- threat
- 2.Sc3#
- 2.Sg5#
- 2.Re3#
- 1...Sxg4
- 2.Sg5#
- 2.Rd1#
- 2.Rd2#
- 2.Rb3#
- 2.Rc3#
- 2.Re3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 1...Re3
- 2.Sc3#
- 2.Sg5#
- 2.Rxe3#
- 1...Sd1
- 2.Sg5#
- 2.Rxd1#
- 2.Rd2#
- 2.Rb3#
- 2.Rc3#
- 2.Re3#
- 2.Rf3#
- 2.Rg3#
- 2.Rh3#
- 1...Sh3
- 2.Sc3#
- 2.Rd1#
- 2.Rd2#
- 2.Rb3#
- 2.Rc3#
- 2.Re3#
- 2.Rf3#
- 2.Rg3#
- 2.Rxh3#
- 1...Sxd3!
- threat
- 1.Rg8?
- 1...Rxe8
- 2.Rxe8#
- 1...Bxd6
- 2.Sfxd6#
- 2.Qa8#
- 1...Sxg4
- 2.Bxd3#
- 1...dxc2
- 2.Sc3#
- 1...Ra1
- 2.Re2#
- 1...Rb1
- 2.Re2#
- 1...Rc1
- 2.Re2#
- 1...Rd1
- 2.Re2#
- 1...Rf1
- 2.Re2#
- 1...Rg1
- 2.Re2#
- 1...Rh1
- 2.Re2#
- 1...Re2
- 2.Rxe2#
- 1...Re5
- 2.Qxe5#
- 1...Re7
- 2.Qxe7#
- 1...Ba7
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...Sd1
- 2.Bxd3#
- 1...Sh1
- 2.Bxd3#
- 1...Sh3
- 2.Bxd3#
- 1...Re3!
- 1...Rxe8
- 1.Rh8?
- 1...Rxe8
- 2.Rxe8#
- 1...Bxd6
- 2.Sfxd6#
- 2.Qa8#
- 1...Sxg4
- 2.Bxd3#
- 1...dxc2
- 2.Sc3#
- 1...Ra1
- 2.Re2#
- 1...Rb1
- 2.Re2#
- 1...Rc1
- 2.Re2#
- 1...Rd1
- 2.Re2#
- 1...Rf1
- 2.Re2#
- 1...Rg1
- 2.Re2#
- 1...Rh1
- 2.Re2#
- 1...Re2
- 2.Rxe2#
- 1...Re5
- 2.Qxe5#
- 1...Re7
- 2.Qxe7#
- 1...Ba7
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...Sd1
- 2.Bxd3#
- 1...Sh1
- 2.Bxd3#
- 1...Sh3
- 2.Bxd3#
- 1...Re3!
- 1...Rxe8
- 1.Kb3?
- Keys
- 1.Sh8!
- 1...Rxe8
- 2.Rxe8#
- 1...Bxd6
- 2.Qa8#
- 1...Sxg4
- 2.Bxd3#
- 1...dxc2
- 2.Sc3#
- 1...Ra1
- 2.Re2#
- 1...Rb1
- 2.Re2#
- 1...Rc1
- 2.Re2#
- 1...Rd1
- 2.Re2#
- 1...Rf1
- 2.Re2#
- 1...Rg1
- 2.Re2#
- 1...Rh1
- 2.Re2#
- 1...Re2
- 2.Rxe2#
- 1...Re3
- 2.Rf4#
- 1...Re5
- 2.Qxe5#
- 1...Re7
- 2.Qxe7#
- 1...Ba7
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...Sd1
- 2.Bxd3#
- 1...Sh1
- 2.Bxd3#
- 1...Sh3
- 2.Bxd3#
- 1...Rxe8
- 1.Sh8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(a);N_GUARD,P_PINP(D)::R(B)
- R(a);N_GUARD::R(B)
- R(a);N_GUARD::R(B),XR(a)
- R(a);SBLOCK::S(L)
- R(e);OGATE::QAR1(M),XR(e)
- R(e);OGATEB::QAR(M),XR(e)
- R(e);N_SPINR(e),OGATE,XQ(M)::R(N),XR(e)
- B(h);OGATE::QAB(M)
- S(b);N_GUARD::B(A),XP(c)
- S(b);N_GUARD,XP(H)::B(A),XP(c)
- P(c);N_SPINP(c),XB(A)::S(I)
- Tries
- Try
- K(E);S_FLIGHT
- Vars
- R(e);N_SPINR(e),OGATE,XQ(M)::R(N),XR(e)
- S(b);N_GUARD,XP(H)::B(A),XP(c)
- P(c);N_SPINP(c),XB(A)::S(I)
- R(a);N_GUARD::R(B)
- R(a);N_GUARD::R(B),XR(a)
- R(a);SBLOCK::S(L)
- R(e);OGATE::QAR1(M),XR(e)
- R(e);OGATEB::QAR(M),XR(e)
- B(h);OGATE::QAB(M)
- S(b);N_GUARD::B(A),XP(c)
- Refutation
- R(a);CHECK
- Try
- K(E);P-FLIGHT
- Vars
- B(h);CHECK,XP(J)::S(L),XB(h)
- R(e);N_SPINR(e),OGATE,XQ(M)::R(N),XR(e)
- S(b);N_GUARD,XP(H)::B(A),XP(c)
- P(c);N_SPINP(c),XB(A)::S(I)
- R(a);N_GUARD::R(B)
- R(a);N_GUARD::R(B),XR(a)
- R(a);SBLOCK::S(L)
- R(e);OGATE::QAR1(M),XR(e)
- R(e);OGATEB::QAR(M),XR(e)
- B(h);OGATE::QAB(M)
- S(b);N_GUARD::B(A),XP(c)
- Refutation
- R(a);CHECK
- Try
- K(E);P-FLIGHT
- Vars
- R(e);N_SPINR(e),OGATE,XQ(M)::R(N),XR(e)
- S(b);N_GUARD,XP(H)::B(A),XP(c)
- P(c);N_SPINP(c),XB(A)::S(I)
- R(a);N_GUARD,P_PINP(D)::R(B)
- R(a);N_GUARD::R(B)
- R(a);N_GUARD::R(B),XR(a)
- R(a);SBLOCK::S(L)
- R(e);OGATE,P_PINS(I)::QAR1(M),XR(e)
- R(e);OGATEB::QAR(M),XR(e)
- B(h);OGATE::QAB(M)
- S(b);N_GUARD::B(A),XP(c)
- Refutation
- B(h);CHECK
- Try
- B(A);
- Vars
- R(e);N_SPINR(e),OGATE,XQ(M)::R(N),XR(e)
- S(b);N_GUARD,XP(H)::B(A),XP(c)
- R(a);N_GUARD::R(B)
- R(a);N_GUARD::R(B),XR(a)
- R(a);SBLOCK::S(L)
- R(e);OGATE::QAR1(M),XR(e)
- R(e);OGATEB::QAR(M),XR(e)
- B(h);OGATE::QAB(M)
- S(b);N_GUARD::B(A),XP(c)
- Refutation
- R(a);N_SPINP(c),XB(A)
- Try
- R(B);XS(b)
- Vars
- R(e);N_SPINR(e),OGATE,XQ(M)::R(N),XR(e)
- R(a);N_GUARD,P_PINP(D)::R(B)
- R(a);N_GUARD::R(B)
- R(a);N_GUARD::R(B),XR(a)
- R(e);OGATE::QAR1(M),XR(e)
- R(e);OGATEB::QAR(M),XR(e)
- B(h);OGATE::QAB(M)
- Refutation
- P(c);N_SPINP(c),XB(A)
- Try
- R(B);XP(c)
- Threat
- DUALS(3)
- Refutation
- S(b);P_SPINS(b),XR(B)
- Try
- R(N);
- Vars
- R(e);N_SPINR(e),OGATE,XQ(M)::R(N),XR(e)
- S(b);N_GUARD,XP(H)::B(A),XP(c)
- P(c);N_SPINP(c),XB(A)::S(I)
- R(a);N_GUARD,P_PINP(D)::R(B)
- R(a);N_GUARD::R(B)
- R(a);N_GUARD::R(B),XR(a)
- R(e);OGATE::QAR1(M),XR(e)
- R(e);OGATEB::QAR(M),XR(e)
- B(h);OGATE::QAB(M)
- S(b);N_GUARD::B(A),XP(c)
- Refutation
- R(a);
- Try
- R(N);
- Vars
- R(e);N_SPINR(e),OGATE,XQ(M)::R(N),XR(e)
- S(b);N_GUARD,XP(H)::B(A),XP(c)
- P(c);N_SPINP(c),XB(A)::S(I)
- R(a);N_GUARD,P_PINP(D)::R(B)
- R(a);N_GUARD::R(B)
- R(a);N_GUARD::R(B),XR(a)
- R(e);OGATE::QAR1(M),XR(e)
- R(e);OGATEB::QAR(M),XR(e)
- B(h);OGATE::QAB(M)
- S(b);N_GUARD::B(A),XP(c)
- Refutation
- R(a);
- Try
- Actual
- S(L);
- Vars
- R(e);N_SPINR(e),OGATE,XQ(M)::R(N),XR(e)
- B(h);OGATE,XP(J)::QAB(M)
- S(b);N_GUARD,XP(H)::B(A),XP(c)
- P(c);N_SPINP(c),XB(A)::S(I)
- R(a);N_GUARD,P_PINP(D)::R(B)
- R(a);N_GUARD::R(B)
- R(a);N_GUARD::R(B),XR(a)
- R(a);SBLOCK::R1(N)
- R(e);OGATE::QAR1(M),XR(e)
- R(e);OGATEB::QAR(M),XR(e)
- B(h);OGATE::QAB(M)
- S(b);N_GUARD::B(A),XP(c)
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).