MESON Chess Problem Database
Problem Display
PID: 199625 (1R6/2ppB3/8/pPPB2P1/PkN3R1/1PN2p1q/1K4p1/1b4Q1 w - - 0 1)
Chobanyan, Shamil
Variantim, 1994
#2
13 + 8
SOLUTION
- SOUND
- Sets
- 1...Ba2
- 2.Sxa2#
- 1...Bc2
- 2.Sa2#
- 1...Bd3
- 2.Sa2#
- 1...Be4
- 2.Sa2#
- 1...Bf5
- 2.Sa2#
- 1...Bg6
- 2.Sa2#
- 1...Bh7
- 2.Sa2#
- 1...c6
- 2.bxc6#
- 1...Ba2
- Tries
- 1.Sd2+?
- 1...Be4
- 2.Sa2#
- 2.Rxe4#
- 2.Qd4#
- 1...Qxg4!
- 1...Be4
- 1.Sa3+?
- 1...Be4
- 2.Sc2#
- 2.Sa2#
- 2.Rxe4#
- 2.Qd4#
- 1...Qxg4!
- 1...Be4
- 1.Se3+?
- 1...Be4
- 2.Sa2#
- 2.Sc2#
- 2.Rxe4#
- 1...Qxg4!
- 1...Be4
- 1.Se5+?
- 1...Be4
- 2.Sa2#
- 2.Sd3#
- 2.Rxe4#
- 2.Qd4#
- 1...Qxg4!
- 1...Be4
- 1.Sb6+?
- 1...Be4
- 2.Sa2#
- 2.Rxe4#
- 2.Qd4#
- 1...Qxg4!
- 1...Be4
- 1.Sd6+?
- 1...Be4
- 2.Sa2#
- 2.Rxe4#
- 2.Qd4#
- 1...Qxg4!
- 1...Be4
- 1.Be4?
- threat
- 2.Sd5#
- 1...Bxe4
- 2.Sa2#
- 1...c6
- 2.bxc6#
- 1...d5
- 2.Sxd5#
- 2.c6#
- 1...Qh8!
- threat
- 1.Bc6?
- threat
- 2.Sd5#
- 1...dxc6
- 2.bxc6#
- 1...Be4
- 2.Sa2#
- 1...d5
- 2.Sxd5#
- 1...Qh8!
- threat
- 1.Be6?
- threat
- 2.Sd5#
- 1...dxe6
- 2.c6#
- 1...Be4
- 2.Sa2#
- 1...c6
- 2.bxc6#
- 1...d5
- 2.Sxd5#
- 2.c6#
- 1...Qh8!
- threat
- 1.Bf7?
- threat
- 2.Sd5#
- 1...Be4
- 2.Sa2#
- 1...c6
- 2.bxc6#
- 1...d5
- 2.Sxd5#
- 2.c6#
- 1...Qh8!
- threat
- 1.Ba8?
- threat
- 2.Sd5#
- 1...Be4
- 2.Sa2#
- 1...c6
- 2.bxc6#
- 1...d5
- 2.Sxd5#
- 2.c6#
- 1...Qh8!
- threat
- 1.Bg8?
- threat
- 2.Sd5#
- 1...Be4
- 2.Sa2#
- 1...c6
- 2.bxc6#
- 1...d5
- 2.Sxd5#
- 2.c6#
- 1...Qh8!
- threat
- 1.Qd4?
- threat
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 2.Sd6#
- 1...g1Q
- 2.Se3#
- 1...g1B
- 2.Se3#
- 1...Qh8
- 2.Se5#
- 1...Bd3
- 2.Sa2#
- 1...d6
- 2.Sd2#
- 2.Sa3#
- 2.Se3#
- 2.Se5#
- 2.Sb6#
- 2.Sxd6#
- 1...Qxg4!
- threat
- 1.Qxb1?
- threat
- 2.Sa2#
- 1...Qh8
- 2.Se5#
- 1...d6!
- threat
- 1.Qe1?
- threat
- 2.Sxb1#
- 2.Sd1#
- 2.Sa2#
- 2.Se2#
- 2.Se4#
- 1...d6
- 2.Se4#
- 1...g1Q
- 2.Sa2#
- 1...g1R
- 2.Sa2#
- 1...Qh1
- 2.Sa2#
- 1...Qg3
- 2.Sa2#
- 1...Qh4
- 2.Sa2#
- 1...Ba2
- 2.Sb1#
- 2.Sd1#
- 2.Sxa2#
- 2.Se2#
- 2.Se4#
- 1...Bc2
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Se2#
- 2.Se4#
- 1...Bd3
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Se2#
- 2.Se4#
- 1...Be4
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Se2#
- 2.Sxe4#
- 1...Bf5
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Se2#
- 2.Se4#
- 1...Bg6
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Se2#
- 2.Se4#
- 1...Bh7
- 2.Sb1#
- 2.Sd1#
- 2.Sa2#
- 2.Se2#
- 2.Se4#
- 1...f2
- 2.Sa2#
- 1...Qh8!
- threat
- 1.Sd2+?
- Keys
- 1.Sa2+!
- 1...Bxa2
- 2.Qe1#
- 1...Bxa2
- 1.Sa2+!
FEATURES
- Static
- TYPE = CHECKING_KEY
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 7
- Sets
- B(a);N_GUARD::S(D),XB(a)
- B(a);N_GUARD::S(D)
- P(g);OGATE::R(M)+P(H),XP(g)
- Tries
- Try
- S(F);CHECK
- Refutation
- Q(d);XR(G)
- Try
- S(F);CHECK
- Refutation
- Q(d);XR(G)
- Try
- S(F);CHECK
- Refutation
- Q(d);XR(G)
- Try
- S(F);CHECK
- Refutation
- Q(d);XR(G)
- Try
- S(F);CHECK
- Refutation
- Q(d);XR(G)
- Try
- S(F);CHECK
- Refutation
- Q(d);XR(G)
- Try
- B(J);
- Threat
- S(D)
- Vars
- B(a);N_GUARD,XB(J)::S(D)
- P(g);OGATE::R(M)+P(H),XP(g)
- Refutation
- Q(d);P_PINS(D)
- Try
- B(J);
- Threat
- S(D)
- Vars
- P(h);OGATE,XB(J)::R(M)+P(H),XP(h)
- B(a);N_GUARD::S(D)
- P(h);::S(D),XP(h)
- Refutation
- Q(d);P_PINS(D)
- Try
- B(J);
- Threat
- S(D)
- Vars
- P(h);N_GUARD,XB(J)::B(L)+P(I)
- B(a);N_GUARD::S(D)
- P(g);OGATE::R(M)+P(H),XP(g)
- Refutation
- Q(d);P_PINS(D)
- Try
- B(J);
- Threat
- S(D)
- Vars
- B(a);N_GUARD::S(D)
- P(g);OGATE::R(M)+P(H),XP(g)
- Refutation
- Q(d);P_PINS(D)
- Try
- B(J);
- Threat
- S(D)
- Vars
- B(a);N_GUARD::S(D)
- P(g);OGATE::R(M)+P(H),XP(g)
- Refutation
- Q(d);P_PINS(D)
- Try
- B(J);
- Threat
- S(D)
- Vars
- B(a);N_GUARD::S(D)
- P(g);OGATE::R(M)+P(H),XP(g)
- Refutation
- Q(d);P_PINS(D)
- Try
- Q(A);
- Threat
- DUALS(6)
- Vars
- P(b);::QAR(A)+S(F)
- Q(d);::QAR(A)+S(F)
- B(a);N_GUARD::S(D)
- Refutation
- Q(d);XR(G)
- Try
- Q(A);XB(a)
- Threat
- S(D)
- Vars
- Q(d);N_GUARD,P_PINS(D)::R(G)+S(F)
- Refutation
- P(h);
- Try
- Q(A);
- Threat
- DUALS(5)
- Vars
- P(h);::QAB(A)+S(D)
- P(b);::QAB(A)+S(D),DCHECK
- Q(d);::QAB(A)+S(D),DCHECK
- P(c);::QAB(A)+S(D),DCHECK
- Refutation
- Q(d);P_PINS(D)
- Try
- Actual
- S(D);CHECK
- Vars
- B(a);XS(D)::QAB(A)
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