MESON Chess Problem Database

Problem Display
PID: 232761 (6r1/4p2b/8/1QPp4/3B3b/qN6/P1k1KP1R/R7 w - - 0 1)

Hoy, Paul

Freie Presse, 1966

6r1/4p2b/8/1QPp4/3B3b/qN6/P1k1KP1R/R7

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Rxc1#
    • 1...Qb4
      • 2.Rc1#
    • 1...Qxc5
      • 2.Rc1#
      • 2.Qxc5#
    • 1...Qxa2
      • 2.Rc1#
    • 1...Qxb3
      • 2.Qxb3#
    • 1...Qa4
      • 2.Rc1#
    • 1...Qa5
      • 2.Rc1#
    • 1...Qa6
      • 2.Rc1#
    • 1...Qa7
      • 2.Rc1#
    • 1...Qa8
      • 2.Rc1#
    • 1...Rg6
      • 2.Qd3#
    • 1...Bd3+
      • 2.Qxd3#
  • Tries
    • 1.Rb1?
      • threat
        • 2.Sa1#
      • 1...Bd3+
        • 2.Qxd3#
      • 1...Qxa2
        • 2.Rc1#
      • 1...Qxb3
        • 2.Qxb3#
      • 1...Qb2
        • 2.Rxb2#
      • 1...Qb4
        • 2.Rc1#
        • 2.Rb2#
      • 1...Kxb1!
    • 1.Rd1?
      • threat
        • 2.Sa1#
      • 1...Bd3+
        • 2.Qxd3#
      • 1...Qxa2
        • 2.Rc1#
      • 1...Qxb3
        • 2.Qxb3#
      • 1...Qc1
        • 2.Rxc1#
      • 1...Qb2!
    • 1.Re1?
      • threat
        • 2.Sa1#
      • 1...Bd3+
        • 2.Qxd3#
      • 1...Qxa2
        • 2.Rc1#
      • 1...Qxb3
        • 2.Qxb3#
      • 1...Qc1
        • 2.Rxc1#
      • 1...Qb2!
    • 1.Rf1?
      • threat
        • 2.Sa1#
      • 1...Bd3+
        • 2.Qxd3#
      • 1...Qxa2
        • 2.Rc1#
      • 1...Qxb3
        • 2.Qxb3#
      • 1...Qc1
        • 2.Rxc1#
      • 1...Qb2!
    • 1.Qa5?
      • threat
        • 2.Qd2#
        • 2.Qc3#
      • 1...Qxc5
        • 2.Rc1#
        • 2.Qd2#
        • 2.Qxc5#
      • 1...Qxa2
        • 2.Qc3#
        • 2.Qxa2#
      • 1...Qxb3
        • 2.Qd2#
      • 1...Qxa5
        • 2.Rc1#
      • 1...Qb2
        • 2.Qd2#
      • 1...Qc1
        • 2.Rxc1#
        • 2.Qc3#
      • 1...Qb4
        • 2.Rc1#
      • 1...Rg3
        • 2.Qd2#
      • 1...Bg5
        • 2.Qc3#
      • 1...Bd3+!
  • Keys
    • 1.Ke3!
      • threat
        • 2.Qe2#
      • 1...Qc1+
        • 2.Rxc1#
      • 1...Qxb3+
        • 2.Qxb3#
      • 1...Rg3+
        • 2.fxg3#
      • 1...Bxf2+
        • 2.Rxf2#
      • 1...Bg5+
        • 2.f4#
      • 1...Qxa2
        • 2.Rc1#
      • 1...Qb4
        • 2.Rc1#
      • 1...Qa5
        • 2.Rc1#
      • 1...Qa6
        • 2.Rc1#
      • 1...Bd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD::R1(A),XQ(b)
    • Q(b);N_GUARD::R1(A)
    • Q(b);N_GUARD,XP(B)::R1(A)
    • Q(b);OGATE,XS(F)::QAB1(H),XQ(b)
    • Q(b);N_GUARD,P_PINQ(H)::R1(A)
    • R(g);S_CUTB(f)::QAB1(H)
    • B(f);CHECK,N_GUARD::QAB1(H),XB(f)
  • Tries
    • Try
      • R(A);
      • Threat
        • S(F)
      • Vars
        • B(f);CHECK,N_GUARD::QAB1(H),XB(f)
        • Q(b);N_GUARD,XP(B)::R1(A)
        • Q(b);OGATE,XS(F)::QAB1(H),XQ(b)
        • Q(b);N_GUARD::R1(A),XQ(b)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • R(A);
      • Threat
        • S(F)
      • Vars
        • B(f);CHECK,N_GUARD::QAB1(H),XB(f)
        • Q(b);N_GUARD,XP(B)::R1(A)
        • Q(b);OGATE,XS(F)::QAB1(H),XQ(b)
        • Q(b);N_GUARD::R1(A),XQ(b)
      • Refutation
        • Q(b);
    • Try
      • R(A);
      • Threat
        • S(F)
      • Vars
        • B(f);CHECK,N_GUARD::QAB1(H),XB(f)
        • Q(b);N_GUARD,XP(B)::R1(A)
        • Q(b);OGATE,XS(F)::QAB1(H),XQ(b)
        • Q(b);N_GUARD::R1(A),XQ(b)
      • Refutation
        • Q(b);
    • Try
      • R(A);
      • Threat
        • S(F)
      • Vars
        • B(f);CHECK,N_GUARD::QAB1(H),XB(f)
        • Q(b);N_GUARD,XP(B)::R1(A)
        • Q(b);OGATE,XS(F)::QAB1(H),XQ(b)
        • Q(b);N_GUARD::R1(A),XQ(b)
      • Refutation
        • Q(b);
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XS(F)::QAR1(H)
        • Q(b);N_GUARD,XQ(H)::R1(A)
        • Q(b);::QAR1(H)
        • Q(b);N_GUARD::R1(A)
        • R(g);::QAR1(H)
        • B(c);::QAR1(H)
      • Refutation
        • B(f);CHECK
  • Actual
    • K(C);P-FLIGHT,P_SPINS(F)
    • Threat
      • QAR2(H)
    • Vars
      • Q(b);CHECK,N_GUARD,N_PINS(F)::R1(A),XQ(b)
      • Q(b);CHECK,OGATE,XS(F)::QAB1(H),XQ(b)
      • R(g);CHECK,OGATE::R(E)+P(D),XR(g)
      • B(c);CHECK,OGATE,P_SPINB(c),XP(D)::R(E),XB(c)
      • B(c);CHECK,N_GUARD,S_CUTR(g)::R(E)+P(D)
      • Q(b);N_GUARD,N_PINS(F),XP(B)::R1(A)
      • Q(b);N_GUARD,N_PINS(F)::R1(A)
      • B(f);N_GUARD,N_PINS(F)::QAB1(H),XB(f)
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