MESON Chess Problem Database
Problem Display
PID: 2871 (8/4K3/1p6/1P1k2n1/1Q3P2/B1p1R3/2N2p2/1N1rqb2 w - - 0 1)
Blake, Percy Francis
Birmingham Daily Post, 1897-1898
#2
8 + 8
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Qd2
- 2.Re5#
- 1...Qe2
- 2.Sxc3#
- 1...Qxe3+
- 2.Sxe3#
- 1...Rxb1
- 2.Qd4#
- 1...Rc1
- 2.Qd4#
- 1...Rd2
- 2.Sxc3#
- 1...Rd3
- 2.Qb3#
- 1...Rd4
- 2.Qxd4#
- 1...Be2
- 2.Re5#
- 1...Bg2
- 2.Qb3#
- 1...Bd3
- 2.Qd4#
- 1...Bh3
- 2.Qb3#
- 1...Bc4
- 2.Qd6#
- 1...Bxb5
- 2.Qxb5#
- 1...Sf3
- 2.Qe4#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Qd2
- Tries
- 1.Kf6?
- 1...Se4+
- 2.Qxe4#
- 1...Qxe3
- 2.Sxe3#
- 1...Rxb1
- 2.Qd4#
- 1...Bxb5
- 2.Qxb5#
- 1...Qd2
- 2.Re5#
- 1...Qe2
- 2.Sxc3#
- 1...Rc1
- 2.Qd4#
- 1...Rd2
- 2.Sxc3#
- 1...Rd3
- 2.Qb3#
- 1...Rd4
- 2.Qxd4#
- 1...Be2
- 2.Re5#
- 1...Bg2
- 2.Qb3#
- 1...Bd3
- 2.Qd4#
- 1...Bh3
- 2.Qb3#
- 1...Bc4
- 2.Qd6#
- 1...Sf3
- 2.Qe4#
- 1...Sh3
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7+!
- 1...Se4+
- 1.Kd7?
- 1...Bxb5+
- 2.Qxb5#
- 1...Qxe3
- 2.Sxe3#
- 1...Rxb1
- 2.Qd4#
- 1...Qd2
- 2.Re5#
- 1...Qe2
- 2.Sxc3#
- 1...Rc1
- 2.Qd4#
- 1...Rd2
- 2.Sxc3#
- 1...Rd3
- 2.Qb3#
- 1...Rd4
- 2.Qxd4#
- 1...Be2
- 2.Re5#
- 1...Bg2
- 2.Qb3#
- 1...Bd3
- 2.Qd4#
- 1...Bc4
- 2.Qd6#
- 1...Sf3
- 2.Qe4#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Bh3+!
- 1...Bxb5+
- 1.Ke8?
- 1...Bxb5+
- 2.Qxb5#
- 1...Rxb1
- 2.Qd4#
- 1...Se4
- 2.Qxe4#
- 1...Qd2
- 2.Re5#
- 1...Qe2
- 2.Sxc3#
- 1...Rc1
- 2.Qd4#
- 1...Rd2
- 2.Sxc3#
- 1...Rd3
- 2.Qb3#
- 1...Rd4
- 2.Qxd4#
- 1...Be2
- 2.Re5#
- 1...Bg2
- 2.Qb3#
- 1...Bd3
- 2.Qd4#
- 1...Bh3
- 2.Qb3#
- 1...Bc4
- 2.Qd6#
- 1...Sf3
- 2.Qe4#
- 1...Sh3
- 2.Qe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Qxe3+!
- 1...Bxb5+
- 1.Sd2?
- threat
- 2.Qd6#
- 2.Qd4#
- 1...Qxe3+
- 2.Sxe3#
- 1...Qxd2
- 2.Re5#
- 1...Bxb5
- 2.Qd6#
- 2.Qxb5#
- 1...cxd2
- 2.Qd4#
- 1...Bc4
- 2.Qd6#
- 2.Qxc4#
- 1...Sf3
- 2.Qd6#
- 2.Qe4#
- 1...Se4
- 2.Qd4#
- 2.Qxe4#
- 1...Se6
- 2.Qd6#
- 2.Qe4#
- 1...Sf7
- 2.Qd4#
- 2.Qe4#
- 1...Rxd2!
- threat
- 1.Re2?
- threat
- 2.Se3#
- 2.Qb3#
- 1...Rxb1
- 2.Se3#
- 2.Qd4#
- 1...Bxe2
- 2.Se3#
- 1...Rd3
- 2.Qb3#
- 1...Qd2
- 2.Re5#
- 2.Qb3#
- 1...Rd4
- 2.Qxd4#
- 1...Qxe2+!
- threat
- 1.fxg5?
- threat
- 2.Qe4#
- 1...Rd4
- 2.Qxd4#
- 1...Bg2
- 2.Qb3#
- 1...Bd3
- 2.Qd4#
- 1...Bc4
- 2.Qd6#
- 1...Qxe3+!
- threat
- 1.Kf6?
- Keys
- 1.Qa4!
- 1...Qxe3+
- 2.Sxe3#
- 1...Rxb1
- 2.Qd4#
- 1...Bxb5
- 2.Qxb5#
- 1...Rd3
- 2.Qb3#
- 1...Qd2
- 2.Re5#
- 1...Qe2
- 2.Sxc3#
- 1...Rc1
- 2.Qd4#
- 1...Rd2
- 2.Sxc3#
- 1...Rd4
- 2.Qxd4#
- 1...Be2
- 2.Re5#
- 1...Bg2
- 2.Qb3#
- 1...Bd3
- 2.Qd4#
- 1...Bh3
- 2.Qb3#
- 1...Bc4
- 2.Qa8#
- 1...Sf3
- 2.Qe4#
- 1...Sh3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Se6
- 2.Qe4#
- 1...Sf7
- 2.Qe4#
- 1...Sh7
- 2.Qe4#
- 1...Qxe3+
- 1.Qa4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(b);N_GUARD,N_PINR(D)::R1(D)
- Q(b);N_GUARD::S(A),XP(e)
- Q(b);CHECK,XR(D)::S(B),XQ(b)
- R(a);N_GUARD,XS(A)::QAR1(E)
- R(a);N_GUARD::QAR1(E)
- R(a);S_CUTQ(b)::S(A),XP(e)
- R(a);S_CUTB(c)::QAB(E)
- R(a);N_GUARD::QAR1(E),XR(a)
- B(c);N_PINR(D),S_CUTQ(b)::R1(D)
- B(c);N_GUARD::QAB(E)
- B(c);S_CUTR(a)::QAR1(E)
- B(c);SBLOCK::QAR1(E)
- B(c);OGATE,XP(G)::QAR2(E),XB(c)
- S(g);N_GUARD::QAB1(E)
- S(g);N_GUARD,N_PINR(D)::QAB1(E),XS(g)
- S(g);N_GUARD,N_PINR(D)::QAB1(E)
- Tries
- Try
- K(H);N_SPINR(D),S_FLIGHT
- Vars
- S(g);CHECK,N_GUARD::QAB1(E),XS(g)
- Q(b);XR(D)::S(B),XQ(b)
- R(a);N_GUARD,XS(A)::QAR1(E)
- B(c);OGATE,XP(G)::QAR2(E),XB(c)
- Q(b);N_GUARD::R1(D)
- Q(b);N_GUARD::S(A),XP(e)
- R(a);N_GUARD::QAR1(E)
- R(a);S_CUTQ(b)::S(A),XP(e)
- R(a);S_CUTB(c)::QAB(E)
- R(a);N_GUARD::QAR1(E),XR(a)
- B(c);S_CUTQ(b)::R1(D)
- B(c);N_GUARD::QAB(E)
- B(c);S_CUTR(a)::QAR1(E)
- B(c);SBLOCK::QAR1(E)
- S(g);N_GUARD::QAB1(E)
- Refutation
- S(g);CHECK
- Try
- K(H);N_SPINR(D),P-FLIGHT
- Vars
- B(c);CHECK,OGATE,XP(G)::QAR2(E),XB(c)
- Q(b);XR(D)::S(B),XQ(b)
- R(a);N_GUARD,XS(A)::QAR1(E)
- Q(b);N_GUARD::R1(D)
- Q(b);N_GUARD::S(A),XP(e)
- R(a);N_GUARD::QAR1(E)
- R(a);S_CUTQ(b)::S(A),XP(e)
- R(a);S_CUTB(c)::QAB(E)
- R(a);N_GUARD::QAR1(E),XR(a)
- B(c);S_CUTQ(b)::R1(D)
- B(c);N_GUARD::QAB(E)
- B(c);S_CUTR(a)::QAR1(E)
- B(c);SBLOCK::QAR1(E)
- S(g);N_GUARD::QAB1(E)
- S(g);N_GUARD::QAB1(E),XS(g)
- Refutation
- B(c);CHECK
- Try
- K(H);P-FLIGHT
- Vars
- B(c);CHECK,OGATE,XP(G)::QAR2(E),XB(c)
- R(a);N_GUARD,XS(A)::QAR1(E)
- S(g);N_GUARD,N_PINR(D)::QAB1(E),XS(g)
- Q(b);N_GUARD,N_PINR(D)::R1(D)
- Q(b);N_GUARD::S(A),XP(e)
- R(a);N_GUARD::QAR1(E)
- R(a);S_CUTQ(b)::S(A),XP(e)
- R(a);S_CUTB(c)::QAB(E)
- R(a);N_GUARD::QAR1(E),XR(a)
- B(c);N_PINR(D),S_CUTQ(b)::R1(D)
- B(c);N_GUARD::QAB(E)
- B(c);S_CUTR(a)::QAR1(E)
- B(c);SBLOCK::QAR1(E)
- S(g);N_GUARD::QAB1(E)
- S(g);N_GUARD,N_PINR(D)::QAB1(E)
- Refutation
- Q(b);CHECK,XR(D)
- Try
- S(A);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,XR(D)::S(B),XQ(b)
- Q(b);N_GUARD,N_PINR(D),XS(A)::R1(D)
- P(e);XS(A)::QAR1(E)
- Refutation
- R(a);XS(A)
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- B(c);XR(D)::S(B)
- R(a);::QAB(E)
- R(a);N_GUARD::QAR1(E),XR(a)
- Refutation
- Q(b);CHECK,XR(D)
- Try
- P(F);XS(g)
- Threat
- QAB1(E)
- Vars
- R(a);N_GUARD::QAR1(E),XR(a)
- B(c);N_GUARD::QAB(E)
- B(c);S_CUTR(a)::QAR1(E)
- B(c);SBLOCK::QAR1(E)
- Refutation
- Q(b);CHECK,XR(D)
- Try
- Actual
- Q(E);
- Vars
- Q(b);CHECK,XR(D)::S(B),XQ(b)
- R(a);N_GUARD,XS(A)::QAR1(E)
- B(c);OGATE,XP(G)::QAR2(E),XB(c)
- R(a);S_CUTB(c)::QAB(E)
- Q(b);N_GUARD,N_PINR(D)::R1(D)
- Q(b);N_GUARD::S(A),XP(e)
- R(a);N_GUARD::QAR1(E)
- R(a);S_CUTQ(b)::S(A),XP(e)
- R(a);N_GUARD::QAR1(E),XR(a)
- B(c);N_PINR(D),S_CUTQ(b)::R1(D)
- B(c);N_GUARD::QAB(E)
- B(c);S_CUTR(a)::QAR1(E)
- B(c);SBLOCK::QAB(E)
- S(g);N_GUARD::QAB1(E)
- S(g);N_GUARD,N_PINR(D)::QAB1(E),XS(g)
- S(g);N_GUARD,N_PINR(D)::QAB1(E)
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).