MESON Chess Problem Database
Problem Display
PID: 273381 (BKn1R1n1/1RB1N3/1P3bP1/5r2/4k2q/5p2/N2Q1P2/4r3 w - - 0 1)
Alaikov, Venelin
diagrammes, 1978
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qe3#
- 1...Rb1
- 2.Qe3#
- 1...Rc1
- 2.Qe3#
- 1...Rd1
- 2.Qe3#
- 1...Rf1
- 2.Qe3#
- 1...Rg1
- 2.Qe3#
- 1...Rh1
- 2.Qe3#
- 1...Re3
- 2.Qxe3#
- 1...Rf4
- 2.Ra7#
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.Sc3#
- 1...Bc3
- 2.Sxc3#
- 1...Bd4
- 2.Qc2#
- 1...Be5
- 2.Ra7#
- 1...Bg5
- 2.Sc3#
- 1...Bxe7
- 2.Sc3#
- 1...Ra1
- Tries
- 1.Sc1?
- threat
- 2.Qd3#
- 1...Rxc1
- 2.Qe3#
- 1...Rd1
- 2.Qe3#
- 1...Re3
- 2.Qxe3#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.Qb4#
- 1...Be5
- 2.Ra7#
- 1...Sd6!
- threat
- 1.Sxc8+?
- 1...Re5
- 2.Sd6#
- 1...Be5
- 2.Sc3#
- 2.Sd6#
- 2.Ra7#
- 1...Be7
- 2.Sc3#
- 1...Se7!
- 1...Re5
- 1.Be5?
- threat
- 2.Qd4#
- 2.Qd5#
- 1...Bxe5+
- 2.Rc7#
- 1...Kxe5
- 2.Sc6#
- 1...Rxe5
- 2.Sc3#
- 1...Bxe7
- 2.Rbxe7#
- 2.Qd4#
- 1...Sxb6
- 2.Qd4#
- 1...Scxe7
- 2.Rbxe7#
- 2.Qd4#
- 1...Sgxe7
- 2.Rbxe7#
- 2.Qd4#
- 1...Rd1
- 2.Qe3#
- 1...Qxf2!
- threat
- 1.Rd8?
- threat
- 2.Qxe1#
- 2.Qc2#
- 2.Qd3#
- 1...Qxf2
- 2.Qd3#
- 1...Re5
- 2.Sc3#
- 2.Rd4#
- 2.Qb4#
- 2.Qd4#
- 1...Qg5
- 2.Qc2#
- 2.Qd3#
- 1...Qh1
- 2.Qc2#
- 2.Qd3#
- 1...Qf4
- 2.Qc2#
- 2.Qd3#
- 1...Qh6
- 2.Qc2#
- 2.Qd3#
- 1...Ra1
- 2.Qe3#
- 2.Qc2#
- 2.Qd3#
- 1...Rb1
- 2.Qe3#
- 2.Qc2#
- 2.Qd3#
- 1...Rc1
- 2.Qe3#
- 2.Qd3#
- 1...Rd1
- 2.Qe3#
- 1...Rf1
- 2.Qe3#
- 2.Qc2#
- 2.Qd3#
- 1...Rg1
- 2.Qe3#
- 2.Qc2#
- 2.Qd3#
- 1...Rh1
- 2.Qe3#
- 2.Qc2#
- 2.Qd3#
- 1...Re2
- 2.Qd3#
- 1...Re3
- 2.Qxe3#
- 1...Rc5
- 2.Qxe1#
- 2.Qd3#
- 1...Rd5
- 2.Qxd5#
- 1...Bc3
- 2.Sxc3#
- 2.Qc2#
- 2.Qd3#
- 1...Bd4
- 2.Rxd4#
- 2.Qc2#
- 2.Qxd4#
- 1...Be5
- 2.Ra7#
- 1...Bg5
- 2.Sc3#
- 2.Rd4#
- 2.Qb4#
- 2.Qc2#
- 2.Qd3#
- 2.Qd4#
- 1...Sd6!
- threat
- 1.Sc1?
- Keys
- 1.Ra7+!
- 1...Rd5
- 2.Bxd5#
- 2.Qxd5#
- 1...Rd5
- 1.Ra7+!
FEATURES
- Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 15
- Sets
- R(a);N_GUARD::QAR1(B)
- R(a);N_GUARD::QAR1(B),XR(a)
- R(e);N_GUARD::QAB1(B),XR(e)
- R(e);S_CUTB(f)::S(A)
- B(f);N_GUARD::S(A),XB(f)
- B(f);SBLOCK::QAB(B)
- B(f);P_PINB(G),S_CUTR(e)::B(I)+R(F)
- B(f);N_GUARD::S(A)
- B(f);N_GUARD,P_SPINB(f),XS(H)::S(A)
- Tries
- Try
- S(A);
- Threat
- QAB1(B)
- Vars
- R(a);N_GUARD,XS(A)::QAR1(B)
- R(a);N_GUARD::QAR1(B)
- R(a);N_GUARD::QAR1(B),XR(a)
- R(e);N_GUARD::QAB1(B),XR(e)
- R(e);S_CUTB(f)::QAR(B)
- B(f);P_PINB(G),S_CUTR(e)::B(I)+R(F)
- Refutation
- S(g);
- Try
- S(H);CHECK,XS(g)
- Vars
- R(e);P_SPINR(e)::S(H)
- B(f);P_SPINB(f)::S(A)
- Refutation
- S(h);P_SPINS(h)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- B(f);CHECK,SBLOCK,XB(G)::B(I)+R(F)
- K(c);P-FLIGHT,XB(G)::R(K)+S(H),DCHECK
- R(e);SBLOCK,XB(G)::S(A)
- S(g);XP(D)::QAR1(B)
- R(a);N_GUARD::QAR1(B)
- Refutation
- Q(d);XP(C)
- Try
- R(K);
- Threat
- DUALS(3)
- Vars
- Q(d);XP(C)::QAB1(B)
- R(a);N_GUARD::QAR1(B)
- R(a);::QAB1(B)
- R(a);N_GUARD::QAR1(B),XR(a)
- R(e);N_GUARD::QAB1(B),XR(e)
- B(f);P_PINB(G),S_CUTR(e)::B(I)+R(F)
- Refutation
- S(g);
- Try
- Actual
- R(F);CHECK
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