MESON Chess Problem Database
Problem Display
PID: 266410 (8/1p6/1K6/4p2B/bRp1p2R/r2k4/1P4N1/n1Q5 w - - 0 1)
Lewis, Robert Tony
The Problemist, 1997
#2
7 + 8
SOLUTION
- SOUND
- Sets
- 1...Kd4
- 2.Qxc4#
- 1...Ra2
- 2.Qc3#
- 1...Rb3
- 2.Qd1#
- 1...Rc3
- 2.Qxc3#
- 1...Bd1
- 2.Qxd1#
- 1...Bc2
- 2.Qe3#
- 1...Bb3
- 2.Qc3#
- 1...Bb5
- 2.Qd1#
- 1...Bc6
- 2.Qd1#
- 1...Bd7
- 2.Qd1#
- 1...Be8
- 2.Qd1#
- 1...Sc2
- 2.Qd1#
- 1...Sb3
- 2.Qc3#
- 1...c3
- 2.Se1#
- 1...e3
- 2.Se1#
- 1...Kd4
- Tries
- 1.Kxb7?
- 1...Kd4
- 2.Qxc4#
- 1...Ra2
- 2.Qc3#
- 1...Rb3
- 2.Qd1#
- 1...Rc3
- 2.Qxc3#
- 1...Bd1
- 2.Qxd1#
- 1...Bc2
- 2.Qe3#
- 1...Bb3
- 2.Qc3#
- 1...Bb5
- 2.Qd1#
- 1...Bd7
- 2.Qd1#
- 1...Be8
- 2.Qd1#
- 1...Sc2
- 2.Qd1#
- 1...Sb3
- 2.Qc3#
- 1...c3
- 2.Se1#
- 1...e3
- 2.Se1#
- 1...Bc6+!
- 1...Kd4
- 1.Sf4+?
- 1...Kd4
- 2.Rxc4#
- 1...exf4!
- 1...Kd4
- 1.Bd1?
- threat
- 2.Qe3#
- 1...Kd4
- 2.Qxc4#
- 1...Bxd1
- 2.Qxd1#
- 1...e3
- 2.Se1#
- 2.Qxe3#
- 1...Sc2!
- threat
- 1.Be2+?
- 1...Kd4
- 2.Qxc4#
- 1...Kxe2!
- 1...Kd4
- 1.Bf3?
- 1...Kd4
- 2.Qxc4#
- 1...Ra2
- 2.Qc3#
- 1...Rb3
- 2.Qd1#
- 1...Rc3
- 2.Qxc3#
- 1...Bd1
- 2.Qxd1#
- 1...Bc2
- 2.Qe3#
- 1...Bb3
- 2.Qc3#
- 1...Bb5
- 2.Qd1#
- 1...Bc6
- 2.Qd1#
- 1...Bd7
- 2.Qd1#
- 1...Be8
- 2.Qd1#
- 1...Sc2
- 2.Qd1#
- 1...Sb3
- 2.Qc3#
- 1...c3
- 2.Se1#
- 1...e3
- 2.Se1#
- 1...exf3!
- 1...Kd4
- 1.Bg4?
- 1...Kd4
- 2.Qxc4#
- 1...Ra2
- 2.Qc3#
- 1...Rb3
- 2.Qd1#
- 1...Rc3
- 2.Qxc3#
- 1...Bd1
- 2.Qxd1#
- 1...Bc2
- 2.Qe3#
- 1...Bb3
- 2.Qc3#
- 1...Bb5
- 2.Qd1#
- 1...Bc6
- 2.Qd1#
- 1...Bd7
- 2.Qd1#
- 1...Be8
- 2.Qd1#
- 1...Sc2
- 2.Qd1#
- 1...Sb3
- 2.Qc3#
- 1...c3
- 2.Se1#
- 1...e3!
- 1...Kd4
- 1.Rb3+?
- 1...Kd4
- 2.Qd2#
- 2.Qd1#
- 1...Bxb3
- 2.Qc3#
- 1...Sxb3
- 2.Qc3#
- 1...cxb3
- 2.Qc3#
- 1...c3
- 2.Qxc3#
- 1...Rxb3+!
- 1...Kd4
- 1.Rxa4?
- threat
- 2.Qd1#
- 1...Kd4
- 2.Qxc4#
- 1...Sb3
- 2.Qc3#
- 1...Rb3+!
- threat
- 1.Rh1?
- 1...Kd4
- 2.Qxc4#
- 1...Ra2
- 2.Qc3#
- 1...Rb3
- 2.Rd1#
- 2.Qd1#
- 1...Rc3
- 2.Qxc3#
- 1...Bd1
- 2.Rxd1#
- 2.Qxd1#
- 1...Bc2
- 2.Qe3#
- 1...Bb3
- 2.Qc3#
- 1...Bb5
- 2.Rd1#
- 2.Qd1#
- 1...Bc6
- 2.Rd1#
- 2.Qd1#
- 1...Bd7
- 2.Rd1#
- 2.Qd1#
- 1...Be8
- 2.Rd1#
- 2.Qd1#
- 1...Sc2
- 2.Rd1#
- 2.Qd1#
- 1...Sb3
- 2.Qc3#
- 1...c3
- 2.Se1#
- 1...e3!
- 1...Kd4
- 1.Rh2?
- 1...Kd4
- 2.Qxc4#
- 1...Ra2
- 2.Qc3#
- 1...Rb3
- 2.Qd1#
- 1...Rc3
- 2.Qxc3#
- 1...Bd1
- 2.Qxd1#
- 1...Bc2
- 2.Qe3#
- 1...Bb3
- 2.Qc3#
- 1...Bb5
- 2.Qd1#
- 1...Bc6
- 2.Qd1#
- 1...Bd7
- 2.Qd1#
- 1...Be8
- 2.Qd1#
- 1...Sc2
- 2.Qd1#
- 1...Sb3
- 2.Qc3#
- 1...c3
- 2.Se1#
- 1...e3!
- 1...Kd4
- 1.Rh3+?
- 1...Kd4
- 2.Qxc4#
- 1...e3!
- 1...Kd4
- 1.Rf4?
- 1...Kd4
- 2.Qxc4#
- 1...Ra2
- 2.Qc3#
- 1...Rb3
- 2.Qd1#
- 1...Rc3
- 2.Qxc3#
- 1...Bd1
- 2.Qxd1#
- 1...Bc2
- 2.Qe3#
- 1...Bb3
- 2.Qc3#
- 1...Bb5
- 2.Qd1#
- 1...Bc6
- 2.Qd1#
- 1...Bd7
- 2.Qd1#
- 1...Be8
- 2.Qd1#
- 1...Sc2
- 2.Qd1#
- 1...Sb3
- 2.Qc3#
- 1...c3
- 2.Se1#
- 1...e3
- 2.Se1#
- 1...exf4!
- 1...Kd4
- 1.Qf1+?
- 1...Kc2
- 2.Qd1#
- 1...Kd4
- 2.Qxc4#
- 1...Kd2!
- 1...Kc2
- 1.Kxb7?
- Keys
- 1.Qe1!
- 1...Kc2
- 2.Qd1#
- 1...Kd4
- 2.Qxe4#
- 1...Ra2
- 2.Qc3#
- 1...Rb3
- 2.Qd1#
- 1...Rc3
- 2.Qxc3#
- 1...Bd1
- 2.Qxd1#
- 1...Bc2
- 2.Qe3#
- 1...Bb3
- 2.Qc3#
- 1...Bb5
- 2.Qd1#
- 1...Bc6
- 2.Qd1#
- 1...Bd7
- 2.Qd1#
- 1...Be8
- 2.Qd1#
- 1...Sc2
- 2.Qd1#
- 1...Sb3
- 2.Qc3#
- 1...c3
- 2.Qe2#
- 1...e3
- 2.Qe2#
- 1...Kc2
- 1.Qe1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- R(b);N_GUARD::QAR1(A)
- R(b);P_PINR(D),S_CUTB(d)::QAR2(A)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(d);N_GUARD::QAR2(A),XB(d)
- B(d);SBLOCK::QAR1(A)
- B(d);S_CUTR(b)::QAR1(A)
- B(d);N_GUARD::QAR2(A)
- S(a);S_CUTB(d)::QAR2(A)
- S(a);S_CUTR(b)::QAR1(A)
- P(e);::S(C)
- P(f);::S(C)
- Tries
- Try
- K(G);P-FLIGHT,XP(h)
- Vars
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- R(b);N_GUARD::QAR1(A)
- R(b);P_PINR(D),S_CUTB(d)::QAR2(A)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(d);N_GUARD::QAR2(A),XB(d)
- B(d);SBLOCK::QAR1(A)
- B(d);S_CUTR(b)::QAR1(A)
- B(d);N_GUARD::QAR2(A)
- S(a);S_CUTB(d)::QAR2(A)
- S(a);S_CUTR(b)::QAR1(A)
- P(e);::S(C)
- P(f);::S(C)
- Refutation
- B(d);CHECK
- Try
- S(C);CHECK
- Vars
- K(c);P-FLIGHT,P_SPINP(e),S_CUTP(g)::R1(D),XP(e)
- Refutation
- P(g);XS(C)
- Try
- B(F);
- Threat
- QAR1(A)
- Vars
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- B(d);OGATE,XB(F)::QAR2(A),XB(d)
- Refutation
- S(a);
- Try
- B(F);CHECK
- Vars
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- Refutation
- K(c);S_FLIGHT,XB(F)
- Try
- B(F);
- Vars
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- R(b);N_GUARD::QAR1(A)
- R(b);P_PINR(D),S_CUTB(d)::QAR2(A)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(d);N_GUARD::QAR2(A),XB(d)
- B(d);SBLOCK::QAR1(A)
- B(d);S_CUTR(b)::QAR1(A)
- B(d);N_GUARD::QAR2(A)
- S(a);S_CUTB(d)::QAR2(A)
- S(a);S_CUTR(b)::QAR1(A)
- P(e);::S(C)
- P(f);::S(C)
- Refutation
- P(f);XB(F)
- Try
- B(F);
- Vars
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- R(b);N_GUARD::QAR1(A)
- R(b);P_PINR(D),S_CUTB(d)::QAR2(A)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(d);N_GUARD::QAR2(A),XB(d)
- B(d);SBLOCK::QAR1(A)
- B(d);S_CUTR(b)::QAR1(A)
- B(d);N_GUARD::QAR2(A)
- S(a);S_CUTB(d)::QAR2(A)
- S(a);S_CUTR(b)::QAR1(A)
- P(e);::S(C)
- Refutation
- P(f);
- Try
- R(D);CHECK
- Vars
- B(d);XR(D)::QAR1(A)
- S(a);XR(D)::QAR1(A)
- P(e);XR(D)::QAR1(A)
- P(e);P_SPINP(e)::QAR1(A),XP(e)
- Refutation
- R(b);CHECK,XR(D)
- Try
- R(D);XB(d)
- Threat
- QAR2(A)
- Vars
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- S(a);S_CUTR(b)::QAR1(A)
- Refutation
- R(b);CHECK
- Try
- R(E);
- Vars
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- R(b);N_GUARD::QAR1(A)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(d);SBLOCK::QAR1(A)
- B(d);S_CUTR(b)::QAR1(A)
- S(a);S_CUTR(b)::QAR1(A)
- P(e);::S(C)
- Refutation
- P(f);
- Try
- R(E);
- Vars
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- R(b);N_GUARD::QAR1(A)
- R(b);P_PINR(D),S_CUTB(d)::QAR2(A)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(d);N_GUARD::QAR2(A),XB(d)
- B(d);SBLOCK::QAR1(A)
- B(d);S_CUTR(b)::QAR1(A)
- B(d);N_GUARD::QAR2(A)
- S(a);S_CUTB(d)::QAR2(A)
- S(a);S_CUTR(b)::QAR1(A)
- P(e);::S(C)
- Refutation
- P(f);
- Try
- R(E);CHECK
- Vars
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- Refutation
- P(f);P_SPINP(f)
- Try
- R(E);
- Vars
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- R(b);N_GUARD::QAR1(A)
- R(b);P_PINR(D),S_CUTB(d)::QAR2(A)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(d);N_GUARD::QAR2(A),XB(d)
- B(d);SBLOCK::QAR1(A)
- B(d);S_CUTR(b)::QAR1(A)
- B(d);N_GUARD::QAR2(A)
- S(a);S_CUTB(d)::QAR2(A)
- S(a);S_CUTR(b)::QAR1(A)
- P(e);::S(C)
- P(f);::S(C)
- Refutation
- P(g);XR(E)
- Try
- Q(A);CHECK
- Vars
- K(c);S_CUTB(d),S_FLIGHT::QAB1(A)
- K(c);OGATE,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(e)
- Refutation
- K(c);P-FLIGHT
- Try
- Actual
- Q(A);
- Vars
- K(c);S_CUTB(d),S_FLIGHT::QAB1(A)
- K(c);N_GUARD,P-FLIGHT,P_SPINP(e)::QAR1(A),XP(f)
- R(b);N_GUARD::QAR1(A)
- R(b);P_PINR(D),S_CUTB(d)::QAR2(A)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(d);N_GUARD::QAR2(A),XB(d)
- B(d);SBLOCK::QAR1(A)
- B(d);S_CUTR(b)::QAR1(A)
- B(d);N_GUARD::QAR2(A)
- S(a);S_CUTB(d)::QAR2(A)
- S(a);S_CUTR(b)::QAR1(A)
- P(e);::QAB1(A)
- P(f);::QAB1(A)
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).