MESON Chess Problem Database
Problem Display
PID: 32426 (B5Qb/1R6/2k4r/p1rNP2b/2p4q/2n5/7B/K2n4 w - - 0 1)
Gavrilov, G
De Problemist, 1928
#2
7 + 10
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Se7#
- 1...Qf2
- 2.Se7#
- 1...Qg3
- 2.Se7#
- 1...Qe7
- 2.Sxe7#
- 1...Qxh2
- 2.Se7#
- 1...Qh3
- 2.Se7#
- 1...Qd4
- 2.Se7#
- 1...Qe4
- 2.Se7#
- 1...Qf4
- 2.Se7#
- 1...Qg4
- 2.Se7#
- 1...Rb5
- 2.Rc7#
- 1...Rxd5
- 2.Qc8#
- 1...Re6
- 2.Qxe6#
- 1...Rf6
- 2.Se7#
- 1...Rh7
- 2.Qe6#
- 1...Bg6
- 2.Qe6#
- 1...Bf6
- 2.Qe6#
- 1...Sb5
- 2.Ra7#
- 2.Rc7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...a4
- 2.Sb4#
- 1...Qe1
- Tries
- 1.Qf7?
- threat
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qd7#
- 1...Rxd5
- 2.Qc7#
- 1...Bxe5
- 2.Rb6#
- 2.Qd7#
- 1...Sxd5
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb8#
- 2.Qd7#
- 1...Rb5
- 2.Rc7#
- 1...Qe7
- 2.Sxe7#
- 1...Qd8
- 2.Rb6#
- 2.Rb8#
- 1...Qh3
- 2.Se7#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Qg4
- 2.Se7#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Rd6
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Rh7
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qe6#
- 1...Bg4
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Sb2
- 2.Rxb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qd7#
- 1...Sb1
- 2.Rxb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qd7#
- 1...Sb5
- 2.Rb6#
- 2.Ra7#
- 2.Rc7#
- 2.Rd7#
- 2.Re7#
- 2.Rb8#
- 2.Qd7#
- 1...Bxf7!
- threat
- 1.Qg4?
- threat
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qd7#
- 1...Kxd5
- 2.Rd7#
- 1...Qxg4
- 2.Se7#
- 1...Rxd5
- 2.Qc8#
- 1...Bxe5
- 2.Rb6#
- 2.Qd7#
- 1...Sxd5
- 2.Qd7#
- 1...Rb5
- 2.Rc7#
- 1...Qe7
- 2.Sxe7#
- 2.Rb6#
- 1...Qd8
- 2.Rb6#
- 2.Rb8#
- 1...Qh3
- 2.Se7#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Rd6
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Re6
- 2.Qxe6#
- 1...Rh7
- 2.Rb6#
- 2.Qe6#
- 1...Be8
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Sb2
- 2.Rxb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qd7#
- 1...Sb1
- 2.Rxb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qd7#
- 1...Sb5
- 2.Rb6#
- 2.Ra7#
- 2.Rc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Rb8#
- 2.Qd7#
- 1...Bxg4!
- threat
- 1.Qb8?
- threat
- 2.Ra7#
- 2.Rc7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Rxd5
- 2.Rc7#
- 2.Qc7#
- 2.Qc8#
- 1...Bxe5
- 2.Ra7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 1...Rb5
- 2.Rc7#
- 1...Qe7
- 2.Sxe7#
- 2.Rc7#
- 2.Rxe7#
- 1...Rh7
- 2.Rc7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rxh7#
- 2.Qd6#
- 1...Bf7
- 2.Ra7#
- 2.Rc7#
- 2.Re7#
- 2.Rxf7#
- 1...Bg7
- 2.Ra7#
- 2.Rc7#
- 2.Re7#
- 2.Rf7#
- 2.Rxg7#
- 1...Kxd5!
- threat
- 1.Qd8?
- threat
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qd7#
- 1...Rxd5
- 2.Qb6#
- 2.Qc7#
- 2.Qc8#
- 1...Rb5
- 2.Rc7#
- 1...Rd6
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qxd6#
- 1...Qe7
- 2.Sxe7#
- 2.Rb6#
- 1...Qh3
- 2.Se7#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Qg4
- 2.Se7#
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Rh7
- 2.Rb6#
- 2.Qd6#
- 1...Bg4
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Be8
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Sb2
- 2.Rxb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qd7#
- 1...Sb1
- 2.Rxb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 2.Qd7#
- 1...Sb5
- 2.Rb6#
- 2.Ra7#
- 2.Rc7#
- 2.Rd7#
- 2.Re7#
- 2.Rf7#
- 2.Rg7#
- 2.Rh7#
- 2.Rb8#
- 2.Qd7#
- 1...Qxd8!
- threat
- 1.Qe8+?
- 1...Kxd5
- 2.Rd7#
- 1...Bxe8!
- 1...Kxd5
- 1.Qf7?
- Keys
- 1.e6!
- threat
- 2.Rb1#
- 2.Rb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- 1...Sb1+
- 2.Rb2#
- 1...Sa2+
- 2.Rb2#
- 1...Se2+
- 2.Rb2#
- 1...Sa4+
- 2.Rb2#
- 1...Se4+
- 2.Rb2#
- 1...Sb5+
- 2.Rg7#
- 1...Sxd5+
- 2.Rb2#
- 1...Kxd5
- 2.Rd7#
- 1...Qxh2
- 2.Rb6#
- 1...Rxd5
- 2.Qc8#
- 1...Rxe6
- 2.Qxe6#
- 1...Qg3
- 2.Rb6#
- 1...Qf4
- 2.Rb6#
- 1...Rb5
- 2.Rc7#
- 1...Be5
- 2.Rb6#
- 1...Qe7
- 2.Sxe7#
- 2.Rb6#
- 1...Qd8
- 2.Rb6#
- 2.Rb8#
- 1...Rh7
- 2.Rb6#
- 1...Sb2
- 2.Rxb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb6#
- 2.Rb8#
- threat
- 1.e6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 9
- REMOVED MATES = 11
- Sets
- Q(d);N_GUARD::S(C)
- Q(d);N_GUARD::S(C),XQ(d)
- Q(d);N_GUARD,XB(B)::S(C)
- R(f);SBLOCK::B(F)+R(E),DCHECK
- R(f);SBLOCK,XS(C)::QAR2(G)
- R(i);N_GUARD::QAR2(G),XR(i)
- R(i);S_CUTQ(d)::S(C)
- R(i);N_GUARD::QAR2(G)
- B(g);S_CUTR(i)::QAR2(G)
- B(j);S_CUTR(i)::QAR2(G)
- P(e);N_GUARD::S(C)
- Tries
- Try
- Q(G);
- Threat
- DUALS(7)
- Vars
- R(f);SBLOCK,XS(C)::QAR1(G)
- R(f);SBLOCK::B(F)+R(E),DCHECK
- Q(d);N_GUARD::S(C),XQ(d)
- Refutation
- B(g);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(7)
- Vars
- K(h);S_FLIGHT,XS(C)::B(F)+R(E),DCHECK
- Q(d);N_GUARD,XQ(G)::S(C)
- R(f);SBLOCK,XS(C)::QAR2(G)
- S(b);P_PINP(D),XS(C)::QAB1(G)
- R(f);SBLOCK::B(F)+R(E),DCHECK
- R(i);N_GUARD::QAR2(G),XR(i)
- Refutation
- B(g);XQ(G)
- Try
- Q(G);
- Threat
- DUALS(6)
- Vars
- R(f);::B(F)+R(E),DCHECK
- Refutation
- K(h);S_FLIGHT,XS(C)
- Try
- Q(G);
- Threat
- DUALS(7)
- Vars
- R(f);SBLOCK::B(F)+R(E),DCHECK
- Refutation
- Q(d);XQ(G)
- Try
- Q(G);CHECK
- Vars
- K(h);S_FLIGHT,XS(C)::B(F)+R(E),DCHECK
- Refutation
- B(g);XQ(G)
- Try
- Actual
- P(D);
- Threat
- DUALS(6)
- Vars
- S(b);CHECK::B(F)+R(E)
- S(b);CHECK,SBLOCK::B(F)+R(E)
- S(b);CHECK,SBLOCK,XS(C)::B(F)+R(E)
- K(h);S_FLIGHT,XS(C)::B(F)+R(E),DCHECK
- Q(d);XB(B)::B(F)+R(E),DCHECK
- R(f);SBLOCK,XS(C)::QAR2(G)
- R(i);OGATE,XP(D)::QAR2(G),XR(i)
- Q(d);::B(F)+R(E),DCHECK
- R(f);SBLOCK::B(F)+R(E),DCHECK
- B(j);::B(F)+R(E),DCHECK
- R(i);::B(F)+R(E),DCHECK
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