MESON Chess Problem Database

Problem Display
PID: 242881 (7n/1b6/1p3Q2/4N2p/N1B1p3/4kp2/7R/1n2B1K1 w - - 0 1)

Degener, Udo

1st HM., Buletin Problemistic, 1992-1993

7n/1b6/1p3Q2/4N2p/N1B1p3/4kp2/7R/1n2B1K1

#2

7 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Bf2#
    • 1...f2+
      • 2.Qxf2#
    • 1...h4
      • 2.Sg4#
  • Tries
    • 1.Sxf3?
      • threat
        • 2.Bf2#
        • 2.Re2#
      • 1...Sc3
        • 2.Bd2#
        • 2.Bf2#
      • 1...exf3!
    • 1.Bg3?
      • threat
        • 2.Qxb6#
      • 1...f2+
        • 2.Qxf2#
      • 1...Kd4
        • 2.Qxb6#
      • 1...b5
        • 2.Qb6#
      • 1...Bc6!
    • 1.Ba5?
      • threat
        • 2.Bxb6#
      • 1...f2+
        • 2.Qxf2#
      • 1...Kd4
        • 2.Bxb6#
      • 1...b5
        • 2.Bb6#
      • 1...bxa5!
    • 1.Ra2?
      • threat
        • 2.Bf2#
      • 1...f2+
        • 2.Bxf2#
        • 2.Qxf2#
      • 1...Kd4!
    • 1.Rb2?
      • threat
        • 2.Bf2#
      • 1...f2+
        • 2.Bxf2#
        • 2.Qxf2#
      • 1...Kd4!
    • 1.Re2+?
      • 1...fxe2
        • 2.Qf2#
      • 1...Kd4!
    • 1.Rh4?
      • threat
        • 2.Qxb6#
      • 1...f2+
        • 2.Qxf2#
      • 1...Kd4
        • 2.Bf2#
      • 1...b5
        • 2.Qb6#
      • 1...Bc6!
    • 1.Rxh5?
      • threat
        • 2.Sg4#
      • 1...f2+
        • 2.Qxf2#
      • 1...Kd4
        • 2.Qxb6#
      • 1...Bc8!
    • 1.Qf4+?
      • 1...Kd4
        • 2.Bf2#
      • 1...Kxf4!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Bf2#
      • 1...f2+
        • 2.Bxf2#
        • 2.Qxf2#
      • 1...Kd4
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(a);SBLOCK::B(A)
    • P(c);CHECK,OGATE::QAB1(G),XP(c)
    • P(e);N_GUARD::S(F)
  • Tries
    • Try
      • S(F);XP(c)
      • Threat
        • DUALS(2)
      • Refutation
        • P(d);XS(F)
    • Try
      • B(A);
      • Threat
        • QAB(G),XP(f)
      • Vars
        • P(c);CHECK,OGATE::QAB1(G),XP(c)
        • K(b);S_FLIGHT::QAB(G),XP(f)
        • P(f);::QAB(G)
      • Refutation
        • B(g);
    • Try
      • B(A);
      • Threat
        • B(A),XP(f)
      • Vars
        • P(c);CHECK,OGATE::QAB1(G),XP(c)
        • K(b);S_FLIGHT::B(A),XP(f)
        • P(f);::B(A)
      • Refutation
        • P(f);XB(A)
    • Try
      • R(C);
      • Threat
        • B(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);
      • Threat
        • B(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • P(c);OGATE,XR(C)::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);
      • Threat
        • QAB(G),XP(f)
      • Vars
        • P(c);CHECK,OGATE::QAB1(G),XP(c)
        • K(b);P_SPINP(d),S_FLIGHT::B(A)
        • P(f);::QAB(G)
      • Refutation
        • B(g);
    • Try
      • R(C);XP(e)
      • Threat
        • S(F)
      • Vars
        • P(c);CHECK,OGATE::QAB1(G),XP(c)
        • K(b);S_FLIGHT::QAB(G),XP(f)
      • Refutation
        • B(g);
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);P_SPINP(d),S_FLIGHT::B(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(G)
  • Actual
    • R(C);
    • Threat
      • B(A)
    • Vars
      • K(b);S_FLIGHT::QAB(G)+S(F)
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