MESON Chess Problem Database
Problem Display
PID: 96533 (b2R3K/3n1N1B/6R1/1p6/3B4/3knP2/1Q1Pp3/N1r1b1q1 w - - 0 1)
MacDougall, Randall
US Problem Bulletin, 1982
#2
10 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxa1
- 2.Qc3#
- 1...Rb1
- 2.Qc3#
- 1...Rd1
- 2.Qc3#
- 1...Rc3
- 2.Qxc3#
- 1...Sc2
- 2.Qc3#
- 1...Sg2
- 2.Rc6#
- 1...Sg4
- 2.Rc6#
- 1...Sc5
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Sb6
- 2.Se5#
- 1...Sf6
- 2.Se5#
- 1...Sb8
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Rxa1
- Tries
- 1.Bxe3?
- threat
- 2.Se5#
- 2.Qd4#
- 1...Kc4
- 2.Qd4#
- 2.Qb3#
- 1...Rxa1
- 2.Se5#
- 2.Qc3#
- 2.Qb3#
- 1...Bxd2
- 2.Qd4#
- 1...Bxf3
- 2.Qd4#
- 1...Qh2
- 2.Qd4#
- 1...Qg3
- 2.Qd4#
- 1...Qg4
- 2.Se5#
- 1...Qg5
- 2.Qd4#
- 1...Rc3
- 2.Se5#
- 2.Qxc3#
- 1...Rc4
- 2.Se5#
- 2.Rd6#
- 1...Rc5
- 2.Qd4#
- 1...Bg3
- 2.Rc6#
- 2.Qd4#
- 1...Bd5
- 2.Qd4#
- 1...Qxe3!
- threat
- 1.Bb6?
- threat
- 2.Se5#
- 2.Qd4#
- 1...Kc4
- 2.Qd4#
- 2.Qb3#
- 1...Rxa1
- 2.Se5#
- 2.Qc3#
- 1...Bxf3
- 2.Qd4#
- 1...Rc2
- 2.Qd4#
- 1...Sc2
- 2.Qc3#
- 1...Qh2
- 2.Qd4#
- 1...Qg3
- 2.Qd4#
- 1...Qg4
- 2.Se5#
- 1...Qg5
- 2.Qd4#
- 1...Rc3
- 2.Se5#
- 2.Qxc3#
- 1...Rc4
- 2.Se5#
- 2.Rd6#
- 1...Bg3
- 2.Qd4#
- 1...Bd5
- 2.Qd4#
- 1...Sd1
- 2.Se5#
- 1...Sf1
- 2.Se5#
- 1...Sg2
- 2.Se5#
- 2.Rc6#
- 1...Sc4
- 2.Rd6#
- 1...Sg4
- 2.Rc6#
- 1...Sd5
- 2.Rg4#
- 1...Sf5
- 2.Se5#
- 1...Rc5!
- threat
- 1.Ba7?
- threat
- 2.Se5#
- 2.Qd4#
- 1...Kc4
- 2.Qd4#
- 2.Qb3#
- 1...Rxa1
- 2.Se5#
- 2.Qc3#
- 1...Bxf3
- 2.Qd4#
- 1...Rc2
- 2.Qd4#
- 1...Sc2
- 2.Qc3#
- 1...Sg4
- 2.Rc6#
- 1...Qh2
- 2.Qd4#
- 1...Qg3
- 2.Qd4#
- 1...Qg4
- 2.Se5#
- 1...Qg5
- 2.Qd4#
- 1...Rc3
- 2.Se5#
- 2.Qxc3#
- 1...Rc4
- 2.Se5#
- 2.Rd6#
- 1...Bg3
- 2.Qd4#
- 1...Bd5
- 2.Qd4#
- 1...Sd1
- 2.Se5#
- 1...Sf1
- 2.Se5#
- 1...Sg2
- 2.Se5#
- 2.Rc6#
- 1...Sc4
- 2.Rd6#
- 1...Sd5
- 2.Rg4#
- 1...Sf5
- 2.Se5#
- 1...Rc5!
- threat
- 1.Rc6+?
- 1...Sf5
- 2.Bxf5#
- 1...Qg6!
- 1...Sf5
- 1.Bxe3?
- Keys
- 1.Bg7!
- threat
- 2.Se5#
- 2.Qd4#
- 1...Kc4
- 2.Qd4#
- 1...Rxa1
- 2.Se5#
- 2.Qc3#
- 1...Bxf3
- 2.Qd4#
- 1...Rc2
- 2.Qd4#
- 1...Sc2
- 2.Qc3#
- 1...Sg4
- 2.Rc6#
- 1...Qh2
- 2.Qd4#
- 1...Qg3
- 2.Qd4#
- 1...Qg4
- 2.Se5#
- 1...Qg5
- 2.Qd4#
- 1...Rc3
- 2.Qxc3#
- 1...Rc4
- 2.Se5#
- 2.Rd6#
- 1...Rc5
- 2.Qd4#
- 1...Bg3
- 2.Qd4#
- 1...Bd5
- 2.Qd4#
- 1...Sd1
- 2.Se5#
- 1...Sf1
- 2.Se5#
- 1...Sg2
- 2.Se5#
- 2.Rc6#
- 1...Sc4
- 2.Rd6#
- 1...Sd5
- 2.Rg4#
- 1...Sf5
- 2.Se5#
- threat
- 1.Bg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 15
- REMOVED MATES = 10
- Sets
- R(a);N_GUARD,XS(A)::QAR1(B)
- R(a);N_GUARD::QAR1(B)
- R(a);N_GUARD::QAR1(B),XR(a)
- S(f);S_CUTR(a)::QAR1(B)
- S(f);N_GUARD,S_CUTQ(c)::B(H)+R(F)
- S(h);N_GUARD::S(G)
- S(h);N_GUARD::S(G),XS(h)
- Tries
- Try
- B(E);P_PINS(h),XS(f)
- Threat
- DUALS(2)
- Vars
- B(b);XP(C)::QAR1(B)
- B(i);XP(D)::QAR1(B)
- Q(c);P_PINB(H)::QAR1(B)
- Q(c);::QAR1(B)
- Q(c);::S(G)
- R(a);::QAR1(B)
- B(i);N_SPINS(h)::QAR1(B)
- Refutation
- Q(c);XB(E)
- Try
- B(E);P_PINS(h)
- Threat
- DUALS(2)
- Vars
- B(i);XP(D)::QAR1(B)
- R(a);::QAR1(B)
- S(f);S_CUTR(a)::QAR1(B)
- Q(c);P_PINB(H)::QAR1(B)
- Q(c);::QAR1(B)
- Q(c);::S(G)
- B(b);::QAR1(B)
- B(i);N_SPINS(h)::QAR1(B)
- S(f);::S(G)
- S(f);SBLOCK::B(H)+R(F),DCHECK
- S(f);N_GUARD,S_CUTQ(c)::B(H)+R(F)
- S(f);N_GUARD,N_SPINS(h),S_CUTB(i)::B(H)+R(F)
- Refutation
- R(a);
- Try
- B(E);P_PINS(h)
- Threat
- DUALS(2)
- Vars
- B(i);XP(D)::QAR1(B)
- R(a);::QAR1(B)
- S(f);S_CUTR(a)::QAR1(B)
- S(f);N_GUARD,S_CUTQ(c)::B(H)+R(F)
- Q(c);P_PINB(H)::QAR1(B)
- Q(c);::QAR1(B)
- Q(c);::S(G)
- B(b);::QAR1(B)
- B(i);N_SPINS(h)::QAR1(B)
- S(f);::S(G)
- S(f);SBLOCK::B(H)+R(F),DCHECK
- S(f);N_GUARD,N_SPINS(h),S_CUTB(i)::B(H)+R(F)
- Refutation
- R(a);
- Try
- R(F);CHECK
- Vars
- S(f);N_GUARD,P_SPINS(f)::B(H),XS(f)
- Refutation
- Q(c);P_SPINQ(c)
- Try
- Actual
- B(E);P_PINS(h)
- Threat
- DUALS(2)
- Vars
- K(e);N_SPINS(h),S_FLIGHT::QAR1(B)
- B(i);XP(D)::QAR1(B)
- R(a);::QAR1(B)
- S(f);S_CUTR(a)::QAR1(B)
- S(f);N_GUARD,S_CUTQ(c)::B(H)+R(F)
- Q(c);P_PINB(H)::QAR1(B)
- Q(c);::QAR1(B)
- Q(c);::S(G)
- R(a);N_GUARD::QAR1(B),XR(a)
- B(b);::QAR1(B)
- B(i);N_SPINS(h)::QAR1(B)
- S(f);::S(G)
- S(f);SBLOCK::B(H)+R(F),DCHECK
- S(f);N_GUARD,N_SPINS(h),S_CUTB(i)::B(H)+R(F)
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).