MESON Chess Problem Database
Problem Display
PID: 211369 (R5r1/2R4p/1PPBN3/2NkPB2/2p2P2/2P5/2P3bK/q4Q2 w - - 0 1)
Petite, Efren
The Problemist, 1986
#2
14 + 6
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.Qd1#
- 1...Qd1
- 2.Qxd1#
- 1...Qa2
- 2.Qd1#
- 1...Qa3
- 2.Qd1#
- 1...Qa4
- 2.Qd1#
- 1...Qa5
- 2.Qd1#
- 1...Qa6
- 2.Qd1#
- 1...Qa7
- 2.Qd1#
- 1...Qxa8
- 2.Qd1#
- 1...Rxa8
- 2.Qxg2#
- 1...Rb8
- 2.Qxg2#
- 1...Rc8
- 2.Qxg2#
- 1...Rd8
- 2.Qxg2#
- 1...Re8
- 2.Qxg2#
- 1...Rf8
- 2.Qxg2#
- 1...Rh8
- 2.Qxg2#
- 1...Bxf1
- 2.Be4#
- 1...Bf3
- 2.Qxf3#
- 1...Bh3
- 2.Be4#
- 2.Qf3#
- 1...Be4
- 2.Bxe4#
- 1...Qb2
- Tries
- 1.Sa4?
- threat
- 2.Ra5#
- 1...Qxc3
- 2.Sxc3#
- 1...Qxa4
- 2.Qd1#
- 1...Rxa8
- 2.Qxg2#
- 1...Qb2
- 2.Qd1#
- 1...Qa3
- 2.Qd1#
- 1...Qb1!
- threat
- 1.Sd7?
- threat
- 2.Sf6#
- 1...Rf8
- 2.Qxg2#
- 1...Rg6!
- threat
- 1.Sg5?
- threat
- 2.Be6#
- 2.Qxg2#
- 1...Qxf1
- 2.Be6#
- 1...Rxg5
- 2.Be6#
- 1...Bxf1
- 2.Be4#
- 2.Be6#
- 1...Rg6
- 2.Qxg2#
- 1...Qd1
- 2.Be6#
- 2.Qxd1#
- 1...Qe1
- 2.Be6#
- 1...Re8
- 2.Qxg2#
- 1...Bh1
- 2.Be6#
- 1...Bf3
- 2.Be6#
- 2.Qxf3#
- 1...Bh3
- 2.Be4#
- 2.Qf3#
- 1...Be4
- 2.Bxe4#
- 2.Be6#
- 1...Qxc3!
- threat
- 1.Sg7?
- threat
- 2.Be6#
- 2.Qxg2#
- 1...Qxf1
- 2.Be6#
- 1...Rxg7
- 2.Be6#
- 1...Bxf1
- 2.Be4#
- 2.Be6#
- 1...Qd1
- 2.Be6#
- 2.Qxd1#
- 1...Qe1
- 2.Be6#
- 1...Re8
- 2.Qxg2#
- 1...Bh1
- 2.Be6#
- 1...Bf3
- 2.Be6#
- 2.Qxf3#
- 1...Bh3
- 2.Be4#
- 2.Qf3#
- 1...Be4
- 2.Bxe4#
- 2.Be6#
- 1...Qxc3!
- threat
- 1.Bf8?
- threat
- 2.Rd8#
- 1...Qxa8
- 2.Qd1#
- 1...Rxf8
- 2.Qxg2#
- 1...Rg7!
- threat
- 1.Rxa1?
- threat
- 2.Rd1#
- 2.Qd1#
- 1...Bxf1
- 2.Be4#
- 1...Bf3
- 2.Qxf3#
- 1...Be4
- 2.Bxe4#
- 1...Rg3!
- threat
- 1.Ra5?
- threat
- 2.Sa4#
- 1...Qxa5
- 2.Qd1#
- 1...Qb2
- 2.Sb3#
- 2.Qd1#
- 1...Qb1
- 2.Sb3#
- 1...Qa3
- 2.Qd1#
- 1...Qa4
- 2.Sxa4#
- 2.Qd1#
- 1...Ra8
- 2.Qxg2#
- 1...Qxc3!
- threat
- 1.Sa4?
- Keys
- 1.Rd8!
- threat
- 2.Bf8#
- 1...Rxd8
- 2.Qxg2#
- 1...Qa8
- 2.Qd1#
- 1...Rg7
- 2.Be7#
- 1...Re8
- 2.Qxg2#
- 1...Rf8
- 2.Bxf8#
- 2.Qxg2#
- threat
- 1.Rd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 16
- Sets
- Q(a);N_GUARD::QAR(A)
- Q(a);N_GUARD::QAR(A),XQ(a)
- Q(a);N_GUARD,XR(N)::QAR(A)
- R(f);N_GUARD,XR(N)::QAB(A),XB(b)
- R(f);N_GUARD::QAB(A),XB(b)
- B(b);N_GUARD,XQ(A)::B(H)
- B(b);N_GUARD::QAB(A),XB(b)
- B(b);N_GUARD::B(H),XB(b)
- Tries
- Try
- S(F);
- Threat
- R(N)
- Vars
- Q(a);XP(D)::S(F),XQ(a)
- Q(a);N_GUARD,XS(F)::QAR(A)
- R(f);N_GUARD,XR(N)::QAB(A),XB(b)
- Q(a);N_GUARD::QAR(A)
- Refutation
- Q(a);
- Try
- S(F);
- Threat
- S(F)
- Vars
- R(f);N_GUARD::QAB(A),XB(b)
- Refutation
- R(f);
- Try
- S(L);
- Threat
- DUALS(2)
- Vars
- Q(a);XQ(A)::B(H)
- R(f);XS(L)::B(H)
- R(f);::QAB(A),XB(b)
- Q(a);::B(H)
- B(b);::B(H)
- Refutation
- Q(a);XP(D)
- Try
- S(L);
- Threat
- DUALS(2)
- Vars
- Q(a);XQ(A)::B(H)
- R(f);XS(L)::B(H)
- Q(a);::B(H)
- R(f);::QAB(A),XB(b)
- B(b);::B(H)
- Refutation
- Q(a);XP(D)
- Try
- B(K);
- Threat
- R(N)
- Vars
- Q(a);N_GUARD,XR(N)::QAR(A)
- R(f);N_GUARD,XB(K)::QAB(A),XB(b)
- Refutation
- R(f);
- Try
- R(N);XQ(a)
- Threat
- DUALS(2)
- Vars
- B(b);N_GUARD,XQ(A)::B(H)
- B(b);N_GUARD::QAB(A),XB(b)
- B(b);N_GUARD::B(H),XB(b)
- Refutation
- R(f);
- Try
- R(N);
- Threat
- R(N)+S(F)
- Vars
- Q(a);N_GUARD,XR(N)::QAR(A)
- Q(a);N_GUARD::R(N)+S(F)
- Q(a);N_GUARD::QAR(A)
- R(f);N_GUARD::QAB(A),XB(b)
- Refutation
- Q(a);XP(D)
- Try
- Actual
- R(N);
- Threat
- R(N)+B(K)
- Vars
- R(f);N_GUARD,XR(N)::QAB(A),XB(b)
- Q(a);N_GUARD::QAR(A)
- R(f);N_GUARD::R(N)+B(K)
- R(f);N_GUARD::QAB(A),XB(b)
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