MESON Chess Problem Database

Problem Display
PID: 239833 (8/8/3pK3/1p1R1p2/1Q6/pN4p1/1RN1k1p1/4r1B1 w - - 0 1)

Hermanson, Halvar

Themes-64, 1960

8/8/3pK3/1p1R1p2/1Q6/pN4p1/1RN1k1p1/4r1B1

#2

7 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf1+
      • 2.Qxe1#
    • 1...Kf3+
      • 2.Sxe1#
  • Tries
    • 1.Se3+?
      • 1...Kf3
        • 2.Rxf5#
      • 1...axb2!
    • 1.Scd4+?
      • 1...Kd1+
        • 2.Se2#
      • 1...Kd3+
        • 2.Se2#
      • 1...Kf1+!
    • 1.Sc1+?
      • 1...Kf1+
        • 2.Qxe1#
      • 1...Kf3+
        • 2.Sxe1#
      • 1...Rxc1!
    • 1.Sbd4+?
      • 1...Kd1+
        • 2.Qxe1#
      • 1...Kf1+
        • 2.Qxe1#
      • 1...Kd3+!
    • 1.Rd2+?
      • 1...Kf3+
        • 2.Sxe1#
      • 1...Kf1+!
    • 1.Re5+?
      • 1...Kd1
        • 2.Rxe1#
        • 2.Qxe1#
        • 2.Qd2#
        • 2.Qxd6#
        • 2.Qd4#
      • 1...Kf1
        • 2.Rxe1#
        • 2.Qxe1#
      • 1...Kd3
        • 2.Sxe1#
        • 2.Qd4#
      • 1...Kf3
        • 2.Sxe1#
        • 2.Sd2#
      • 1...dxe5!
    • 1.Qd2+?
      • 1...Kf1+
        • 2.Qxe1#
      • 1...Kf3+!
    • 1.Qc4+?
      • 1...Kf3+
        • 2.Sxe1#
      • 1...bxc4!
    • 1.Qe4+?
      • 1...Kf1
        • 2.Qxe1#
      • 1...fxe4!
    • 1.Qf4?
      • threat
        • 2.Sxa3#
        • 2.Rd2#
      • 1...Rxg1
        • 2.Rd2#
      • 1...axb2
        • 2.Rd2#
      • 1...Ra1
        • 2.Rd2#
      • 1...Rb1
        • 2.Rd2#
      • 1...Rc1
        • 2.Sxc1#
        • 2.Rd2#
      • 1...Rf1
        • 2.Rd2#
        • 2.Qe3#
      • 1...a2
        • 2.Sca1#
        • 2.Sa3#
        • 2.Se3#
        • 2.Sb4#
        • 2.Rd2#
      • 1...Rd1!
  • Keys
    • 1.Rxf5!
      • threat
        • 2.Qd2#
      • 1...Kd1+
        • 2.Qxe1#
      • 1...Kd3+
        • 2.Sxe1#
      • 1...Rd1
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(b);CHECK,S_FLIGHT::QAR1(E),XR(a)
    • K(b);CHECK,S_FLIGHT::S(C),XR(a)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P_PINS(C),S_FLIGHT::R(F),XP(g)
      • Refutation
        • P(d);XR(B)
    • Try
      • S(C);CHECK
      • Vars
        • K(b);CHECK,S_FLIGHT::R(F)+S(C)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(b);CHECK,S_FLIGHT::QAR1(E),XR(a)
        • K(b);CHECK,S_FLIGHT::S(C),XR(a)
      • Refutation
        • R(a);XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • K(b);CHECK,S_FLIGHT::QAR1(E),XR(a)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(b);CHECK,S_FLIGHT::S(C),XR(a)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • R(F);CHECK
      • Refutation
        • P(h);XR(F)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);CHECK,S_FLIGHT::QAR1(E),XR(a)
      • Refutation
        • K(b);CHECK,S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);CHECK,S_FLIGHT::S(C),XR(a)
      • Refutation
        • P(f);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,P_PINQ(E),S_FLIGHT::QAR1(E),XR(a)
      • Refutation
        • P(g);XQ(E)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XB(A)::R1(F)
        • P(d);XR(B)::R1(F)
        • R(a);::R1(F)
      • Refutation
        • R(a);
  • Actual
    • R(F);XP(g)
    • Threat
      • QAR1(E)
    • Vars
      • K(b);CHECK,S_FLIGHT::QAR1(E),XR(a)
      • K(b);CHECK,S_FLIGHT::S(C),XR(a)
      • R(a);SBLOCK::QAR2(E)
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