MESON Chess Problem Database
Problem Display
PID: 57312 (2b1B3/1nrpn3/p1k5/bR2Pp2/2P2Pp1/3Q2K1/5B2/8 w - - 0 1)
McArthur, William Johnstone
2nd Prize, Brisbane Courier, 1918-1919
#2
8 + 10
SOLUTION
- SOUND
- Sets
- 1...Be1
- 2.Rb6#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb4
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 2.cxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...axb5
- 2.cxb5#
- 1...Be1
- Tries
- 1.Kg2?
- 1...axb5
- 2.cxb5#
- 1...Be1
- 2.Rb6#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb4
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 2.cxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...g3!
- 1...axb5
- 1.Kh2?
- 1...axb5
- 2.cxb5#
- 1...Be1
- 2.Rb6#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb4
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 2.cxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...g3+!
- 1...axb5
- 1.Bg1?
- 1...axb5
- 2.cxb5#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb4
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 2.cxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...Be1+!
- 1...axb5
- 1.Be3?
- 1...axb5
- 2.cxb5#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb4
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 2.cxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...Be1+!
- 1...axb5
- 1.Rb1?
- 1...Be1
- 2.Rb6#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 2.cxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...Bb4!
- 1...Be1
- 1.Rb2?
- 1...Be1
- 2.Rb6#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 2.cxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...Bb4!
- 1...Be1
- 1.Rb3?
- 1...Be1
- 2.Rb6#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 2.cxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...Bb4!
- 1...Be1
- 1.Rb4?
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 2.cxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...Bxb4!
- 1...Bb6
- 1.Rxb7?
- 1...Rxb7
- 2.Qd6#
- 1...Bxb7
- 2.Qd6#
- 1...Bb4
- 2.Rb6#
- 1...Be1
- 2.Rb6#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sd5
- 2.Qxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...Kxb7!
- 1...Rxb7
- 1.Qe4+?
- 1...Sd5
- 2.Qxd5#
- 1...fxe4!
- 1...Sd5
- 1.Qd1?
- 1...Bb4
- 2.Rb6#
- 1...Be1
- 2.Rb6#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 1...Sg6
- 2.Qh1#
- 2.Qd5#
- 1...Sg8
- 2.Qh1#
- 2.Qd5#
- 1...axb5!
- 1...Bb4
- 1.Qd2?
- 1...Bxd2
- 2.Rb6#
- 1...Bb4
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sd8
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...axb5!
- 1...Bxd2
- 1.Qf3+?
- 1...Sd5
- 2.Qxd5#
- 1...gxf3!
- 1...Sd5
- 1.Qd4?
- 1...Sc5
- 2.Qxc5#
- 2.Qd6#
- 1...Be1
- 2.Rb6#
- 2.Qb6#
- 1...Bd2
- 2.Rb6#
- 2.Qb6#
- 1...Bc3
- 2.Rb6#
- 2.Qb6#
- 1...Bb4
- 2.Rb6#
- 2.Qb6#
- 1...Bb6
- 2.Rxb6#
- 2.Qxb6#
- 1...Sd6
- 2.Qc5#
- 2.Qxd6#
- 1...Sd8
- 2.Qc5#
- 2.Qd6#
- 1...Sd5
- 2.Qxd5#
- 1...Sg6
- 2.Qd5#
- 1...Sg8
- 2.Qd5#
- 1...axb5!
- 1...Sc5
- 1.Kg2?
- Keys
- 1.Qb1!
- 1...axb5
- 2.Qxb5#
- 1...Bb4
- 2.Rb6#
- 1...Be1
- 2.Rb6#
- 1...Bd2
- 2.Rb6#
- 1...Bc3
- 2.Rb6#
- 1...Bb6
- 2.Rxb6#
- 1...Sc5
- 2.Rxc5#
- 1...Sd6
- 2.Rc5#
- 1...Sd8
- 2.Rc5#
- 1...Sd5
- 2.cxd5#
- 1...Sg6
- 2.Qh1#
- 1...Sg8
- 2.Qh1#
- 1...axb5
- 1.Qb1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 6
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(b);N_GUARD,P_PINB(A)::R1(F)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B)
- P(d);OGATE,XR(F)::P(D),XP(d)
- Tries
- Try
- K(C);P-FLIGHT
- Vars
- P(d);OGATE,XR(F)::P(D),XP(d)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B)
- Refutation
- P(a);
- Try
- K(C);S_FLIGHT
- Vars
- P(d);OGATE,XR(F)::P(D),XP(d)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B)
- Refutation
- P(a);CHECK
- Try
- B(A);
- Vars
- P(d);OGATE,XR(F)::P(D),XP(d)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B)
- Refutation
- B(b);CHECK
- Try
- B(A);
- Vars
- P(d);OGATE,XR(F)::P(D),XP(d)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B)
- Refutation
- B(b);CHECK
- Try
- R(F);
- Vars
- B(b);N_GUARD,P_PINB(A)::R1(F)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B)
- Refutation
- B(b);
- Try
- R(F);
- Vars
- B(b);N_GUARD,P_PINB(A)::R1(F)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B)
- Refutation
- B(b);
- Try
- R(F);
- Vars
- B(b);N_GUARD,P_PINB(A)::R1(F)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B)
- Refutation
- B(b);
- Try
- R(F);
- Vars
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B)
- Refutation
- B(b);XR(F)
- Try
- R(F);XS(f)
- Vars
- R(g);SBLOCK,XR(F)::QAR1(B)
- B(j);SBLOCK,XR(F)::QAR1(B)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD,P_PINB(A)::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(i);N_GUARD::QAB1(B),XS(i)
- S(i);N_GUARD::QAB1(B)
- Refutation
- K(e);N_SPINP(h),S_FLIGHT,XR(F)
- Try
- Q(B);CHECK
- Vars
- S(i);N_GUARD,P_SPINS(i)::QAB1(B),XS(i)
- Refutation
- P(c);XQ(B)
- Try
- Q(B);
- Vars
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD,P_PINB(A)::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B),XS(i)
- Refutation
- P(d);XR(F)
- Try
- Q(B);
- Vars
- B(b);N_GUARD,XQ(B)::R1(F)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(i);N_GUARD::QAB1(B),XS(i)
- S(i);N_GUARD::QAB1(B)
- Refutation
- P(d);XR(F)
- Try
- Q(B);CHECK
- Vars
- S(i);N_GUARD,P_SPINS(i)::QAB1(B),XS(i)
- Refutation
- P(a);XQ(B)
- Try
- Q(B);
- Vars
- S(i);N_GUARD::QAB1(B),XS(i)
- S(i);N_GUARD::QAB1(B)
- Refutation
- P(d);XR(F)
- Try
- Actual
- Q(B);
- Vars
- P(d);OGATE,XR(F)::QAB1(B),XP(d)
- B(b);N_GUARD::R1(F)
- B(b);N_GUARD,P_PINB(A)::R1(F)
- B(b);N_GUARD::R1(F),XB(b)
- S(f);N_GUARD::R1(F),XS(f)
- S(f);N_GUARD::R1(F)
- S(i);OGATE::P(D),XS(i)
- S(i);N_GUARD::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).