MESON Chess Problem Database
Problem Display
PID: 249806 (2BKn3/2P2N1b/1N4n1/1p1RB1p1/q3kpr1/2P1b1p1/4Q3/8 w - - 0 1)
Ahues, Herbert Siegfried Oskar
Schweizerische Schachzeitung, 1996
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Qc2
- 2.Rd4#
- 1...Qb3
- 2.Rd4#
- 1...Qa1
- 2.Rd4#
- 1...Qa2
- 2.Rd4#
- 1...Qa3
- 2.Rd4#
- 1...Qd4
- 2.Rxd4#
- 1...Qa5
- 2.Rd4#
- 1...Qa6
- 2.Rd4#
- 1...Qa7
- 2.Rd4#
- 1...Qa8
- 2.Rd4#
- 1...Rh4
- 2.Sxg5#
- 1...Sxe5
- 2.Rxe5#
- 1...Sd6
- 2.Sxd6#
- 1...Sf6
- 2.Sd6#
- 1...Sxc7
- 2.Sd6#
- 1...Sg7
- 2.Sd6#
- 1...f3
- 2.Qd3#
- 1...b4
- 2.Rd4#
- 1...Qc2
- Tries
- 1.Bd4?
- threat
- 2.Bf5#
- 1...f3
- 2.Qxe3#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...Sd6
- 2.Sxd6#
- 1...Sg7
- 2.Sd6#
- 1...Qa8!
- threat
- 1.Bd6?
- threat
- 2.Bf5#
- 1...Sxd6
- 2.Sxd6#
- 1...Qa8
- 2.Rd4#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...Sg7!
- threat
- 1.Bf6?
- threat
- 2.Bf5#
- 1...Qa8
- 2.Rd4#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...Sd6
- 2.Sxd6#
- 1...Sg7
- 2.Sd6#
- 1...f3!
- threat
- 1.Bg7?
- threat
- 2.Bf5#
- 1...Sxg7
- 2.Sd6#
- 1...Qa8
- 2.Rd4#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sh8
- 2.Re5#
- 1...Sd6
- 2.Sxd6#
- 1...f3!
- threat
- 1.Bh8?
- threat
- 2.Bf5#
- 1...Sxh8
- 2.Re5#
- 1...Qa8
- 2.Rd4#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Se7
- 2.Re5#
- 1...Sf8
- 2.Re5#
- 1...Sd6
- 2.Sxd6#
- 1...Sg7
- 2.Sd6#
- 1...f3!
- threat
- 1.Bxg4?
- threat
- 2.Sxg5#
- 2.Qd3#
- 2.Qf3#
- 1...Sxe5
- 2.Sxg5#
- 2.Rxe5#
- 1...Qd1
- 2.Sxg5#
- 1...Qc2
- 2.Sxg5#
- 2.Rd4#
- 2.Qf3#
- 2.Qxc2#
- 1...Qc4
- 2.Sxg5#
- 2.Qf3#
- 1...Qd4
- 2.Sxg5#
- 2.Rxd4#
- 1...Sh4
- 2.Sxg5#
- 2.Qd3#
- 1...f3
- 2.Sxg5#
- 2.Qd3#
- 2.Qxf3#
- 1...Qa8+!
- threat
- 1.Bd4?
- Keys
- 1.Bxf4!
- threat
- 2.Qxe3#
- 1...Kxf4
- 2.Qxg4#
- 1...Rxf4
- 2.Sxg5#
- 1...Sxf4
- 2.Re5#
- 1...gxf4
- 2.Bf5#
- 1...Qd4
- 2.Rxd4#
- threat
- 1.Bxf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 17
- Sets
- Q(c);N_GUARD::R1(C)
- Q(c);N_GUARD,P_PINR(C)::R1(C),XQ(c)
- Q(c);N_GUARD,P_PINB(H)::R1(C)
- R(f);N_GUARD::S(G),XP(h)
- S(i);OGATE,XB(D)::R1(C),XS(i)
- S(k);N_GUARD::S(G),XS(k)
- S(k);N_GUARD::S(G)
- S(k);N_GUARD,XP(F)::S(G)
- P(e);SBLOCK::QAB1(A)
- P(g);S_CUTQ(c)::R1(C)
- Tries
- Try
- B(D);
- Threat
- B(H)
- Vars
- P(e);N_GUARD::QAR1(A),XB(a)
- S(i);N_GUARD::R1(C)
- S(i);N_GUARD::R1(C),XS(i)
- S(k);N_GUARD::S(G),XS(k)
- S(k);N_GUARD::S(G)
- Refutation
- Q(c);P_PINB(H)
- Try
- B(D);
- Threat
- B(H)
- Vars
- S(k);XB(D)::S(G),XS(k)
- Q(c);N_GUARD,P_PINB(H)::R1(C)
- S(i);N_GUARD::R1(C)
- S(i);N_GUARD::R1(C),XS(i)
- Refutation
- S(k);
- Try
- B(D);
- Threat
- B(H)
- Vars
- Q(c);N_GUARD,P_PINB(H)::R1(C)
- S(i);N_GUARD::R1(C)
- S(i);N_GUARD::R1(C),XS(i)
- S(k);N_GUARD::S(G),XS(k)
- S(k);N_GUARD::S(G)
- Refutation
- P(e);
- Try
- B(D);
- Threat
- B(H)
- Vars
- S(k);N_GUARD,XB(D)::S(G)
- Q(c);N_GUARD,P_PINB(H)::R1(C)
- S(i);N_GUARD::R1(C)
- S(i);N_GUARD::R1(C),XS(i)
- S(k);N_GUARD::S(G),XS(k)
- Refutation
- P(e);
- Try
- B(D);
- Threat
- B(H)
- Vars
- S(i);N_GUARD,XB(D)::R1(C)
- Q(c);N_GUARD,P_PINB(H)::R1(C)
- S(i);N_GUARD::R1(C)
- S(i);N_GUARD::R1(C),XS(i)
- S(k);N_GUARD::S(G),XS(k)
- S(k);N_GUARD::S(G)
- Refutation
- P(e);
- Try
- B(H);XR(f)
- Threat
- DUALS(3)
- Vars
- Q(c);P_PINR(C)::S(G),XP(h)
- Refutation
- Q(c);CHECK
- Try
- Actual
- B(D);XP(e)
- Threat
- QAR1(A),XB(a)
- Vars
- K(d);N_SPINB(a),OGATEB,P-FLIGHT,XB(D)::QAR1(A),XR(f)
- R(f);N_GUARD,SBLOCK,XB(D)::S(G),XP(h)
- S(i);N_GUARD,SBLOCK,XB(D)::R1(C)
- P(h);SBLOCK,XB(D)::B(H)
- Q(c);N_GUARD,P_PINR(C)::R1(C),XQ(c)
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